No full-text available
To read the full-text of this research,
you can request a copy directly from the authors.
Peixes do Pantanal-Manual de Identificação
... Apresenta-se como um grupo dominante entre os peixes de águas continentais da América do Sul, exibindo ampla gama de categorias tróficas, incluindo espécies herbívoras, onívoras, detritívoras e, em sua maioria, carnívoras (BRITSKI; SILIMON;LOPES, 1999;REIS;LIEM et al., 2012). ...
... Apresenta-se como um grupo dominante entre os peixes de águas continentais da América do Sul, exibindo ampla gama de categorias tróficas, incluindo espécies herbívoras, onívoras, detritívoras e, em sua maioria, carnívoras (BRITSKI; SILIMON;LOPES, 1999;REIS;LIEM et al., 2012). ...
... O padrão de colorido frequentemente é caracterizado pela presença de listras longitudinais, barras transversais ou máculas arredondadas distribuídas no corpo (BRITSKI; SILIMON;LOPES, 1999). Muitas espécies, como o piau e a piapara, são relevantes para a pesca comercial. ...
O livro Peixes do Baixo rio Taquari carrega um lema na sua escrita: conhecer para conservar. Voltado para o levantamento minucioso de espécies de peixes de quatro locais distintos do rio Taquari, o livro possui um catálogo ricamente ilustrado com fotografia de cada espécie coletada, trazendo para o leitor informações úteis sobre sua morfologia e sua biologia. Os organizadores também chamam a atenção para a presença das espécies de peixes vulneráveis e ameaçadas de extinção, enfatizando a importância de manter a qualidade da água e dos hábitats aquáticos. Esta obra tem grande relevância não somente em nível regional, mas também nacional. Constitui um registro inédito da ictiofauna da bacia hidrográfica de um reservatório de grande porte. Permitirá aos interessados terem um retrato atual da diversidade de peixes, para que todos possam implementar esforços em prol da sua conservação e, assim, permitir que as futuras gerações usufruam desse conhecimento sobre os recursos ictiofaunísticos, com os quais os autores deste trabalho vêm a nos brindar. A obra é organizada por Heleno Brandão, Jamile Queiroz de Souza, André Batista Nobile, Felipe Pontieri de Lima, Nadayca Thayane Bonani Mateussi e Reinaldo José da Silva e já está disponível no site da EDUTFPR! Confira já!
A nova publicação da Editora Universitária está disponível em: https://editora.utfpr.edu.br/produto/peixes-do-baixo-rio-taquari/
Confira a entrevista com os autores: https://youtu.be/0d_r-5gr4lI
📣 Acompanhe a EDUTFPR:
https://www.instagram.com/edutfpr/
📚 Catálogo completo: https://editora.utfpr.edu.br/
🖋️ Publique pela EDUTFPR:
https://omp.utfpr.edu.br/index.php/edutfpr/submissions
🔗 Saiba mais: https://portal.utfpr.edu.br/editora
📧 editora@utfpr.edu.br
A Editora da UTFPR tem o compromisso institucional de compartilhar e dar acesso amplo aos conhecimentos produzidos pela UTFPR. Este projeto editorial, produzido pela EDUTFPR, é financiado com recurso público, que visa à ampla e democrática disseminação do conhecimento. Esta edição promove a educação de qualidade, que assegura a educação inclusiva, equitativa e de qualidade e promove oportunidades de aprendizagem ao longo da vida para todos.
A obra “Peixes do rio Taquari” apresenta uma lista com fotos, chaves de identificação e comentários de atributos biológicos de 57 espécies de peixes registradas nesta sub-bacia, contribuindo com informações com linguagem acessível para leitores que tenham ou não conhecimento da biologia dos peixes. Almejamos que este livro possa ser útil para elaboração de planos de manejo e estratégias para preservar e conservar a ictiofauna deste importante ecossistema aquático brasileiro e, também, contribua com a divulgação e a valorização do conhecimento científico para os acadêmicos, pesquisadores, pescadores profissionais ou amadores, admiradores da natureza e os tomadores de decisões, no que se refere à preservação, conservação e restauração dos ecossistemas.
... Nome popular: bagre, chum-chum, mandi, mandizinho (Britski et al., 1999;Bockmann, Guazzelli, 2003;Bockmann, Slobodian, 2013). (Fricke et al., 2022). ...
... Ao longo das décadas, novas espécies de Pimelodella foram sendo descritas, e o diagnóstico proposto por Eigenmann já não era suf iciente para delimitar o gênero, o qual foi então redef inido diversas vezes (Mees, 1983;Bockmann, Miquelarena, 2008;Souza-Shibatta et al., 2013;Slobodian et al., 2017;Slobodian, Pastana, 2018 (Britski et al., 1999;Aguilera, Azpelicueta, 2015;Koerber et al., 2017;Mirande, Koerber, 2020). Apesar de sua ocorrência ter sido registrada também na Amazônia Boliviana (Chernoff et al., 2000), é possível que materiais provenientes dessas áreas apresentem problemas de identif icação, devido a semelhanças morfológicas de P. mucosa com P. serrata, sendo esta última também encontrada neste local (Slobodian, 2017). ...
... Apesar de sua ocorrência ter sido registrada também na Amazônia Boliviana (Chernoff et al., 2000), é possível que materiais provenientes dessas áreas apresentem problemas de identif icação, devido a semelhanças morfológicas de P. mucosa com P. serrata, sendo esta última também encontrada neste local (Slobodian, 2017). Biologia: Pimelodella mucosa é uma espécie de pequeno porte, com o maior espécime registrado apresentando um comprimento padrão de 135 mm (Britski et al., 1999). A espécie, assim como diversas outras do gênero Pimelodella, carece de informações sobre reprodução, hábitos alimentares e ocupação do habitat. ...
Esta Nota técnica foi elaborada em resposta ao Projeto de Lei (PL)
número 614, do ano 2018 (PL614/2018), recentemente aprovado na
Assembleia Legislativa do Estado de São Paulo (ALESP). Proposto
pelo Deputado Estadual Carlos Eduardo Pignatari (Carlão Pignatari),
presidente da ALESP, o PL614/2018 trata da regulamentação da
pesca, embarque, transporte, comercialização e processamento de
peixes das espécies exóticas invasoras de tucunarés (Cichla spp.)
em sistemas aquáticos continentais do Estado de São Paulo, com o
suposto objetivo de conservação desses estoques.
... niveatus and P. spinosus). Fish of this family are known as armored catfish or acaris, typically exhibiting benthic habits and having their bodies covered in bony plates (Santos et al., 1984;Britski et al., 1999;Graça, 2004) and comprise the sixth-largest family in the world (Nelson, 1984). They occur in various environments but prefer lotic habitats (Britski et al., 1999). ...
... Fish of this family are known as armored catfish or acaris, typically exhibiting benthic habits and having their bodies covered in bony plates (Santos et al., 1984;Britski et al., 1999;Graça, 2004) and comprise the sixth-largest family in the world (Nelson, 1984). They occur in various environments but prefer lotic habitats (Britski et al., 1999). They are well-known species, although many still have undefined statuses due to significant intra-specific variation (Weber, 2003). ...
Aim: To evaluate the contribution of naturalists Francis de Castelnau, Jacob Heckel, Johan Baptist von Spix, Johann Natterer, Louis Agassiz, and Rudolf Kner to the knowledge of taxonomic diversity of freshwater ichthyofauna in Brazil between the years 1829 and 1859.
Methods: Two data matrices were constructed: one with information on freshwater fish species known in Brazil until 2021 and another based on the list of fish species in South America presented by Castelnau (1855). Both were supplemented with information on taxonomy, geographic distribution, authorship, and geographic distribution. The Taxonomic Diversity Index (Δ) was calculated from the first matrix to assess the contribution of the naturalists and determine the number of species per hydrographic region. The second matrix allowed for a detailed analysis of Francis de Castelnau's contribution.
Results: Between 1829 and 1859, the five naturalists considered in this study described 171 fish species in Brazil, including several endemic species. Castelnau was the naturalist with the greatest contribution (Δ=87.7), followed by Agassiz (85.5), Spix & Agassiz (85.4), Kner (80.8), and Heckel (48.7). The five naturalists described species from four hydrographic regions: the Amazon (122 species), Paraná (25), Tocantins-Araguaia (18), and São Francisco (13). The 276 fish species cataloged by Francis de Castelnau are mostly from the Neotropical region, including some endemics, originating from watercourses in the southeastern Brazilian region, encompassing species collected for the first time in the watercourses of Central Brazil and some marine species, ranging from small (5 cm) to medium (56.0 cm) in size.
Conclusions: The five naturalists considered in the study made a significant contribution to the early scientific knowledge (1829-1859) of the Brazilian ichthyofauna, but this contribution varies among the naturalists, with particular emphasis on Castelnau, Agassiz, and Spix & Agassiz, as well as among the hydrographic basins, notably the Amazon.
... Distribuição: Pimelodella mucosa é uma espécie Neotropical de água doce, distribuída pela bacia do rio Paraguai, abrangendo os países Paraguai, Brasil e Argentina (Britski et al., 1999;Aguilera, Azpelicueta, 2015;Koerber et al., 2017;Mirande, Koerber, 2020). Apesar de sua ocorrência ter sido registrada também na Amazônia Boliviana (Chernoff et al., 2000), é possível que materiais provenientes dessas áreas apresentem problemas de identif icação, devido a semelhanças morfológicas de P. mucosa com P. serrata, sendo esta última também encontrada neste local (Slobodian, 2017). ...
... Apesar de sua ocorrência ter sido registrada também na Amazônia Boliviana (Chernoff et al., 2000), é possível que materiais provenientes dessas áreas apresentem problemas de identif icação, devido a semelhanças morfológicas de P. mucosa com P. serrata, sendo esta última também encontrada neste local (Slobodian, 2017). Biologia: Pimelodella mucosa é uma espécie de pequeno porte, com o maior espécime registrado apresentando um comprimento padrão de 135 mm (Britski et al., 1999). A espécie, assim como diversas outras do gênero Pimelodella, carece de informações sobre reprodução, hábitos alimentares e ocupação do habitat. ...
Boletim - Sociedade Brasileira de Ictiologia (1808-1436)
... Foram contabilizadas um total de 10 ordens, 37 famílias e 174 espécies de peixes para a região (Tabela 1). Este valor corresponde à cerca de 65% da fauna conhecida para o alto Paraguai, segundo Britski; Silimon; Lopes (2007). Representando o padrão esperado para a região Neotropical (LOWE-MCCONELL, 1987), as ordens Characiformes e Siluriformes fo-Ainda que estas sejam as espécies mais conhecidas, a distribuição das classes de tamanho mostra que a maior parte da riqueza está entre peixes de pequeno e médio porte, compondo 86% do total da amostragem, enquadrando-se na estimativa neotropical onde cerca de 70% das espécies atinge no máximo 15 cm de comprimento padrão (Reis et al. 2003) e abrigam grande parte da ictiofauna com algum grau de ameaça de extinção (CASTRO; POLAZ, 2020). ...
... Tabela 1. Espécies de peixes registradas para a região brasileira do Chaco, no município de Porto Murtinho, Mato Grosso do Sul. Tamanho das espécies é baseado nos dados de comprimento padrão a partir da bibliografia disponível Lopes, 2007;Froese;Pauly, 2020). Marcações em negrito sinalizam as espécies que ocorreram exclusivamente em uma categoria de ambiente. ...
Neste capítulo apresentamos uma breve revisão de estudos sobre diversidade e estrutura genética, e padrões filogeográficos de espécies de plantas do Chaco. As espécies estudadas apresentaram de moderados a altos níveis de diversidade genética em comparação a outras espécies da mesma família, mas que ocorrem em outras fisionomias brasileiras. O sistema misto de cruzamento e a fragmentação do habitat são fatores que provavelmente contribuem para a alta estruturação genética e altos coeficientes de endogamia observados em algumas das espécies estudadas. Também apresentamos estudos de caso com representantes de Apocynaceae, Bromeliaceae, e Cactaceae, recentemente desenvolvidos por nosso grupo de pesquisa. Esses estudos revelam que as populações destas espécies apresentaram de baixa a alta diversidade genética, de acordo com a fragmentação populacional observada nas respectivas áreas de amostragem. Nossos estudos destacam a importância do Chaco para a diversidade genética destas espécies, bem como a necessidade de mais estudos genéticos populacionais neste bioma, subsidiando medidas de conservação.
... Foram contabilizadas um total de 10 ordens, 37 famílias e 174 espécies de peixes para a região (Tabela 1). Este valor corresponde à cerca de 65% da fauna conhecida para o alto Paraguai, segundo Britski; Silimon; Lopes (2007). Representando o padrão esperado para a região Neotropical (LOWE-MCCONELL, 1987), as ordens Characiformes e Siluriformes fo-Ainda que estas sejam as espécies mais conhecidas, a distribuição das classes de tamanho mostra que a maior parte da riqueza está entre peixes de pequeno e médio porte, compondo 86% do total da amostragem, enquadrando-se na estimativa neotropical onde cerca de 70% das espécies atinge no máximo 15 cm de comprimento padrão (Reis et al. 2003) e abrigam grande parte da ictiofauna com algum grau de ameaça de extinção (CASTRO; POLAZ, 2020). ...
... Tabela 1. Espécies de peixes registradas para a região brasileira do Chaco, no município de Porto Murtinho, Mato Grosso do Sul. Tamanho das espécies é baseado nos dados de comprimento padrão a partir da bibliografia disponível Lopes, 2007;Froese;Pauly, 2020). Marcações em negrito sinalizam as espécies que ocorreram exclusivamente em uma categoria de ambiente. ...
... Foram contabilizadas um total de 10 ordens, 37 famílias e 174 espécies de peixes para a região (Tabela 1). Este valor corresponde à cerca de 65% da fauna conhecida para o alto Paraguai, segundo Lopes (2007). Representando o padrão esperado para a região Neotropical (LOWE-MCCONELL, 1987), as ordens Characiformes e Siluriformes fo-ram as mais representativas, com 82 espécies na primeira e 57 na segunda. ...
... Tabela 1. Espécies de peixes registradas para a região brasileira do Chaco, no município de Porto Murtinho, Mato Grosso do Sul. Tamanho das espécies é baseado nos dados de comprimento padrão a partir da bibliografia disponívelLopes, 2007;Froese;Pauly, 2020). Marcações em negrito sinalizam as espécies que ocorreram exclusivamente em uma categoria de ambiente. ...
RESUMO Localizado no limite sul da bacia do Alto Paraguai, no município de Porto Murtinho, encontra-se a única região de Chaco conhecida no território brasileiro. A região recebe forte influência dos ciclos hidroló-gicos do rio Paraguai e apresenta uma vasta gama de corpos d'água pro-pícios como habitat para diversas espécies de peixes, como rios, corixos, baías e poças temporárias. Ainda que grande parte dos endemismos de espécies de peixes ocorram nas áreas altas de cabeceiras e que a comunidade de peixes passe por um processo de homogeneização devido ao pulso de inundação, é fundamental a compreensão de quais espécies es-tão aonde para fins de melhor entendimento e conservação da ictiofauna da bacia do Alto Paraguai. Nesse contexto, empreendemos esforços na amostragem de peixes em diferentes ambientes e com diferentes técnicas de captura na região do Chaco brasileiro.
... Some specimens have already been identified as B. melanurus in the Rio Paraguay basin (Britski et al., 1999;Sidlauskas et al., 2006;Gimênes Junior & Rech, 2022), despite contradictions regarding this identification (see Chernoff et al., 1994). Chernoff et al. (1994) Dagosta et al., 2024;Lopes et al., 2024); alternatively, as a more plausible hypothesis, given that the region has been sampled for over 20 years and no specimens have been collected so far, (2) the anthropogenic introduction of species for restocking fisheries in the area, which has been affected by several hydroelectric power plants and fish farming, or for aquarium trade due to the species' ornamental potential (Daga et al., 2014;Dagosta et al., 2024;Ota et al., 2018). ...
This study presents the first record of the non‐native species Bryconops aff. melanurus (Bloch 1794) within the upper Paraná River floodplain in Brazil. Two specimens were collected in December 2023 as part of a long‐term ecological research programme (PELD). A morphological analysis confirmed species identity. The introduction of B. aff. melanurus into this region raises concerns about its potential impact on the local ichthyofauna because of its dietary plasticity and the disturbed nature of the ecoregion. It is essential to conduct continuous monitoring to assess the ecological implications of the introduction.
... Flattened barbels; maxillary barbels extending beyond the origin of the adipose fin. Tip of the dorsal fin reaching the adipose fin; pectoral fin not reaching the pelvic fin (Britski et al. 2007). Strongly bifurcated caudal fin with pointed lobes (Eigenmann & Eigenmann 1890). ...
This review provides an updated list, morphological characterization,
and an artificial dichotomous key for identifying Pimelodidae fish species
of Bolivia. 346 specimens deposited in the UMSS–Museo d’Orbigny
Ichthyological Collection (Cochabamba, Bolivia) were examined. The
morphological characterization was based on 41 measurements. The
species list considered the museum collection and records available in the
literature for Bolivia. Forty-eight species and 24 genera were identified
from the Amazon (44) and La Plata (16) basins. New records for Bolivia were
Hypophthalmus celiae, H. oremaculatus, Iheringichthys megalops, and
two new potential species were identified within the genus Propimelodus.
Additionally, two new undescribed genera are listed: one collected from
the bottom of the Beni River channel (three specimens), and the second
from the bottom of the Beni and the Mamoré river channels in the north
of Bolivia (one specimen). Species groups such as Pimelodus gr. blochii
and P. gr. maculatus are taxonomically challenging and difficult to identify
due to morphological similarities. This study reveals the high diversity of
Pimelodidae in Bolivia, and the presence of new genera and species.
... As paisagens são compostas por um mosaico de campos alagáveis e não alagáveis, florestas (florestas monodominantes, semi-decíduas, secas, ripárias e cerradões), savanas de vegetação aberta (cerrado, campo cerrado, campo de murundu, savanas monodominantes, savanas de palmeiras), e ambientes aquáticos permanentes e temporários (rios, lagoas de água doce, lagoas salobras, meandros abandonados, brejos e vazantes). A diversidade biológica é considerável, com mais de 2.500 espécies de plantas Pott et al., 2011) e pelo menos 1.200 espécies de vertebrados (Gimenes- Junior & Reck, 2022;Nunes et al., 2021;Ferreira et al., 2017;Souza et al., 2017;Tomas et al., 2010;Tubelis & Tomas, 2003;Britski et al., 1999). O Pantanal abriga populações vigorosas de muitas espécies ameaçadas de extinção (Tomas et al., 2019), apesar de seu número relativamente pequeno de espécies endêmicas, como a cobra Helicops boitata (Moraes da Silva et al., 2019) e nove espécies de plantas . ...
O Pantanal é considerado a maior planície alagada contínua de água doce do mundo, e seu uso sustentável requer uma estrutura conceitual unificada. O longo processo para a formulação de políticas públicas tem contribuído para a crescente vulnerabilidade do
Pantanal. Dada a necessidade de uma base conceitual para auxiliar esse processo, elaboramos uma lista de oito princípios básicos baseados nas evidências científicas acumuladas: (i) Considerar a Bacia do Rio Paraguai como unidade de gestão; (ii) Estabelecer regras com base no conceito de uso restrito; (iii) Garantir o uso ecologicamente sustentável do Pantanal; (iv) Manter a heterogeneidade e a funcionalidade nas paisagens do Pantanal; (v) Manter a integridade e a conectividade hidrológica; (vi) Assegurar ampla representatividade ambiental da rede de Áreas Protegidas; (vii) Promover incentivos econômicos para o uso conservacionista da terra; e (viii) Reconhecer e proteger os povos tradicionais e seus valores, recursos e modos de vida. No entanto, a elaboração de políticas públicas deve ser um processo de tomada de decisão participativo e inclusivo em direção a um futuro mais justo e
sustentável.
... The landscapes are composed of a mosaic of floodable and nonfloodable grasslands, forests (monodominant, semi-deciduous, dry, riparian, and cerradão forests), open woodland savannas (cerrado, campo cerrado, campo de murundu, monodominant savannas, palm savannas), and permanent and temporary aquatic environments (rivers, freshwater ponds, brackish water ponds, oxbows, marshes, and vazantes). The biological diversity is considerable, with over 2500 plant species (Pott et al., 2011; and at least 1200 vertebrate species (Britski et al., 1999;Ferreira et al., 2017;Gimênes Junior & Rech, 2022;Nunes et al., 2021;Souza et al., 2017;Tomas et al., 2010;Tubelis & Tomas, 2003). The Pantanal shelters vigorous populations of many endangered species (Tomas et al., 2019;Tomas et al., 2015), despite its relatively small number of endemic species, such as the snake Helicops boitata (Moraes-da-Silva et al., 2019) and nine plant species . ...
The Pantanal is considered the largest continuous freshwater wetland in the world, and its sustainable use requires a unified conceptual framework. The lengthy process to establish public policies has contributed to the increasing vulnerability of the Pantanal. Given the need for a conceptual basis to help this process, we elaborate a list of eight basic principles based on the accumulated scientific evidence: (i) Consider the Paraguay River Basin a management unity; (ii) Establish rules that follow the concept of restricted use approach; (iii) Ensure the ecologically sustainable use of the Pantanal; (iv) Maintain the environmental heterogeneity and functionality in the Pantanal landscapes; (v) Maintain the hydrological integrity and connectivity; (vi) Ensure the environmental representativeness of the protected areas network; (vii) Provide economic incentives for conservationist use of the land; and (viii) Recognize and protect traditional people, their values, resources, and way of living. However, the elaboration of public policies should be a participatory and inclusive decision-making process towards a more just and sustainable future.
... Lima et al. [32] based their taxonomic designation of the specimens collected in their study on the manual of Britski et al. [73]. However, Souza-Filho and Shibatta [9] described a new species, Pimelodus pantaneiro, from this study area, for example, which was denominated previously as P. maculatus by Britski et al. [73,76]. This newly described species is easily confused with P. maculatus, in particular, in terms of its coloration, given that both species have three to five large spots on the flanks [9]. ...
Pimelodus is the most speciose genus of the family Pimelodidae, and is amply distributed in the Neotropical region. The species-level taxonomy and phylogenetic relationships within this genus are still poorly resolved, however. These taxonomic problems and the general lack of data have generated major uncertainties with regard to the identification of specimens from different localities. In the present study, we applied a single-locus species delimitation approach to identify the MOTUs found within the genus Pimelodus and provide sound evidence for the evaluation of the species richness of this genus in the different river basins of the Neotropical region. The study was based on the analysis of sequences of the mitochondrial COI gene of 13 nominal species, which resulted in the identification of 24 consensus MOTUs. Only six nominal species were recovered as well-defined molecular entities by both the traditional barcoding analysis and the molecular delimitation methods, while the other seven presented cryptic diversity or persistent taxonomic uncertainties. The lineages identified from the Parnaíba ecoregions, Amazonas Estuary and Coastal Drainages may represent a much greater diversity of Pimelodus species than that recognized currently, although a more detailed study of this diversity will be necessary to provide a more definitive classification of the genus.
... Nomes populares: Lambari-listrado, Lambari (Britski et al., 2007;Carvalho et al., 2022); Informações gerais: Astyanax Baird & Girard representa um dos gêneros mais ricos em espécies de Characidae e abriga peixes conhecidos como piabas, lambaris e tambiús, com ampla distribuição pela região Neotropical (Mirande, 2010(Mirande, , 2018Oliveira et al., 2011). Em uma recente hipótese f ilogenética, baseada em dados combinados (morfologia e molecular), foi proposta uma redef inição de Astyanax, limitando a um grupo formado por dois clados: o primeiro com as espécies da América do Norte e Central (incluindo a espécie-tipo) e espécies Sul-americanas trans-andinas; e o segundo, com as espécies do grupo Astyanax bimaculatus (Sul-americanas, cis-andinas) (Téran et al., 2020). ...
Peixe da Vez - Astyanax lineatus (Perugia, 1891)
... Porém, as 50 tilápias (Oreochromis niloticus) foram obtidas de cativeiros comerciais localizados no município de Jarinu, SP, no mesmo período. Os peixes utilizados foram identificados segundo Britski et al. (1999) 8 . ...
Resumo OBJETIVO: Este trabalho teve por objetivo pesquisar a presença de parasitos de importância zoonótica de peixes das espécies Hoplias malabaricus e Oreochromis niloticus coletadas no Estado de São Paulo e que seriam encaminhadas para consumo humano. MÉTODOS: As 50 traíras (Hoplias malabaricus) foram adquiridas de pescadores do extremo sul do município de São Paulo, SP. Porém, as 50 tilápias (Oreochromis niloticus) foram obtidas no município de Jarinu, SP. Os exemplares foram necropsiados para as análises parasitológicas. Para a necropsia foi realizado exame externo e interno dos exemplares. Os parasitas encontrados foram limpos, fixados, separados por espécie e sítio de infecção/infestação e quantificados. RESULTADOS: Das 50 traíras (Hoplias malabaricus bloch, 1794) coletadas, em 49 indivíduos foram encontrados no mesentério Contracaecum spp., o que representa um percentual de 98% de positividade. Foram encontrados no total 3.568 espécimes de Contracaecum spp. nos peixes parasitados, apresentando uma intensidade média de 71,42 parasitos por peixe parasitado. Das 50 tilápias (Oreochromis niloticus) coletadas, nenhuma (0%) apresentou positividade. CONCLUSÃO: A partir das informações e dados apresentados, concluímos que se faz necessário novos estudos de outras espécies de peixes, de modo a determinar a predominância do Contracaecum spp. em espécies diferentes de peixes e se há a existência de outros parasitos de potencial zoonótico que possa impactar no quesito saúde pública no entorno dessas comunidades, permitindo campanhas de conscientização e fomento de políticas públicas. DESCRITORES: Peixes, Contracaecum, Hoplias malabaricus, Oreochromis niloticus, Zoonoses.
... The Pantanal is one of the main South American biomes, mainly composed of floodplains, covering approximately 150,000 km 2 in the central area of South America, including part of the Upper Paraguay River basin, of which 93% is in Brazil (Alho, 2020;Fernandes et al., 2019;Pereira et al., 2012;Tomas et al., 2019). It was recently recognized as a Ramsar site (Alho, 2020), an area with high fish occurrence (Britski et al., 2007), including different species of Gymnotidae de Sousa et al., 2017;Fernandes et al., 2005). The genus Gymnotus has the broadest geographic distribution among all Gymnotiformes, occurring in the plains of South and Central America, from the Salado River in the Argentinean Pampas to the San Nicolas River in Mexico, and in the Caribbean island of Trinidad (Albert and Crampton, 2003). ...
Free article at
https://authors.elsevier.com/c/1h90CACeYFYnR
until 15/06/23.
... Descripción Especie nativa que puede alcanzar los 170 mm de LE máxima (Britski et al., 2007). Presenta una cabeza prominente; boca ventral; no tiene barbillas nasales; tiene dos pares de barbillas maxilares; el primer par sobrepasa la abertura branquial y el segundo también, pero es de menor longitud que el primero; no tiene barbillas mentonianas; cuerpo alargado con 2 hileras de placas; aleta adiposa corta con espina; aleta caudal convexa; D I 7; P I 7; V I 5; A I 5; C II 11. ...
En esta ocasión nos complace presentar esta obra, que describe un importante grupo de vertebrados, como son los peces del Alto Nangaritza, ubicado en la Cordillera del Cóndor, considerada como una región invaluable desde el punto de vista ecosistémico y de biodiversidad. Se describe desde los nombres científicos hasta las posibles distribuciones espaciales de las especies encontradas, acompañadas de fotografías de alta calidad. Esta guía es fruto de varios muestreos desarrollados en el año 2016, en los ríos Nangaritza y Numpatakaime en la zona denominada Alto Nangaritza. En los muestreos participaron varios miembros de las comunidades locales, quienes además aportaron con sus conocimientos relacionados con los nombres comunes de las especies. Esperamos que esta obra contribuya a la difusión de conocimientos, a la conservación de este significativo grupo de fauna, que constituye un importante recurso para las comunidades locales.162 páginas ISBN: 978-9942-778-16-1 e-ISBN: 978-9942-778-17-8
... We identified the material collected with the help of specialists in taxonomy of neotropical fish, and using specialized literature (eg. : Gery, 1977;Kullander, 1986;Britski et al., 2007). The material will also be listed in the ichthyological scientific collection of the Museu Paraense Emilio Goeldi. ...
In this manuscript, we aimed to answer: 1) which environmental and spatial processes are determinant for the patterns of co-occurrence of fish in Amazonian streams, and 2) which variables are responsible for the positive and negative associations between species pairs. For this, we sampled 32 Terra-Firme forest streams in a basin affected by different land uses in the eastern Amazon. In each stream, we measured environmental metrics for its physical characterization; estimated the percentage of land cover of the drainage network; and sampled the ichthyofauna. We also analyzed associations (positive or negative) between pairs of species and whether these associations were determined by physical habitat characteristics and the percentage of vegetation cover, spatial dispersal or biotic interactions, using a classical null model approach complemented by spatial tests and of environmental characteristics of the sites occupied by members of each pair of species. Most of the patterns of ichthyofauna co-occurrence occurred at random, composed mainly of rare species, which may be due to the specificity of these species or because the still forested and highly heterogeneous areas of the region may be acting as a mosaic, together with less aggressive land uses such as agriculture, generating these random pairs. Meanwhile, 32 species (41.03%) formed 613 non-random aggregated or segregated pairs (20.41% of the total pairs), composed mainly of species of intermediate frequency and abundance in the region and with different niches and guilds and determined by biotic interactions, environmental filters' action and/or by limiting species dispersal.
... Each specimen was identified to the lowest feasible taxonomical level using identification keys (Britski et al., 2007;Géry, 1977;Kullander, 1986) and aided by specialists for various taxa. ...
Species distribution models often fail to predict observed patterns of species diversity, and this is because some species within a regional pool that are tolerant of conditions at a given location may nevertheless be absent from the local community. These missing species have been termed “dark diversity”. In the present study, we investigated which factors explain dark diversity among fish assemblages in Amazonian streams.
We sampled 71 streams in areas with different types of land use within two river basins and estimated dark diversity from patterns of species co‐occurrence, using Beals’ index, along environmental gradients. From this procedure, taxa are designated as dark diversity components when they are absent from a given stream, but often co‐occur with the local species at other streams, indicating similar ecological requirements. We used generalised linear models both to determine whether environmental or landscape variables, connectivity, instream environmental heterogeneity or some combination of these factors explained dark diversity of fishes, and to evaluate whether ecomorphology is associated with the extent to which a species contributes to dark diversity and which specific traits contribute the most to explaining variation in dark diversity.
Mean local diversity exceeded observed dark diversity. The magnitude of dark diversity was directly associated with the proportion of secondary forest in the immediate catchment and with the index of proximity to anthropogenic impact. Species that have high affinity for environments with higher current velocity, low swimming ability and that capture food mainly on the surface contributed more to dark diversity, which suggests that swimming ability, habitat preference and aspects related to diet are key predictors of the probability that a given species will be present at locations with suitable habitat.
Our findings reinforce the idea that dark diversity results from interactions between species traits and environmental factors, including anthropogenic impacts. Understanding the interplay among environmental factors and species traits that contribute to dark diversity provides targets for improved ecosystem restoration and sustainability of native species assemblages.
... Although adult individuals can be found throughout the river, spawn are restricted to the upstream reach, at the onset of the rainy season (austral spring, between October and January) after upstream migration (Ferraz de Lima and Chabalin, 1981;Costa and Mateus 2009;Rauber et al., 2021). Pacu is an omnivorous with a tendency to herbivory, and its diet is mainly composed of leaves, fruits, seeds, and flowers, being able to feed occasionally on small invertebrates and fish (Britski et al., 2007;Urbinati et al., 2010;Sado et al., 2020). This fish is an important commercial species in the Paraguay River Basin because it is highly sought by both recreational and commercial fishermen (Mateus et al., 2004;Mateus et al., 2011;Massaroli et al., 2021). ...
Aquatic organisms that consume resources from riparian vegetation or floodplain forests act as trophic links between aquatic and terrestrial ecosystems. For instance, the pacu Piaractus mesopotamicus (Holmberg 1887), which is a migratory fish species, can play an important role in this interaction on Neotropical floodplains. We compared the stomach content of individuals from this species between two different parts of a large river floodplain during contrasting hydrological seasons to quantify the spatiotemporal contribution of allochthonous and autochthonous resources in their diet. Moreover, we performed a bipartite network approach to evaluate the sensitivity of these populations to a simulated loss of food resources through the potential deforestation of riparian vegetation. We found that in the upper catchment, individuals fed mainly on allochthonous items, but their identity depended on the season: fruits were the most abundant resource during the wet season, whereas leaves were more consumed during the dry season. In the lower catchment, the contribution of allochthonous resources was slightly lower in the dry season than in the wet season, when the pacu was able to explore the floodplain. Finally, the results from our consumer-resource network model indicated that this system is vulnerable to riparian deforestation since P. mesopotamicus is highly dependent on input from the riparian vegetation items to its feed.
... Fish specimens' standard length (SL hereafter) (cm) and weight (g) were measured and identified following the identification keys found in Britski et al. (2007). The species valid names were checked according to Fricke et al. (2022). ...
This study aims to evaluate the dynamics of fish trophic guilds according to the longitudinal gradient of the Paraguay River, northern Pantanal, Brazil. Three river segments were sampled: plateau, confluence and plain. These segments have different physical and biological characteristics, with high water flow in forest areas in plateau and slow flow in meanders, with Pantanal typical vegetation. In total, 26,542 individuals distributed in 130 fish species were collected. The sampled species were characterized in seven trophic guilds. From the seven trophic guilds identified, only three were statistically related to the type of the environment; herbivores were more abundant in the plateau, piscivores in the confluence, and invertivores in the plain. According to values of corrected Akaike Information Criteria, the environmental variable that best explains the abundance of piscivorous fishes in the segments sampled in the Paraguay River was water transparency. For herbivores, the model that explained the variation in abundance was composed by temperature, altitude and dense forest proportion. The variable altitude best represented the abundance of invertivores. Water transparency, temperature, altitude, river width and dense forest proportion were determining factors for the distribution of piscivorous, herbivorous and invertivorous fishes as a response to an environmental gradient that meets its ecological requirements. Understanding the trophic relationships is fundamental for management actions, contributing to the maintenance of ecosystem services of different species. Therefore, future research must be taken into account regarding management and ecological relationships.
... The fish of this subfamily live in lake, lagoon or river pool environments (Britski et al., 1988). They have an elongated and compressed body and a mouth provided with caniniform conical teeth and are therefore popularly known as "peixe-cachorro" ("dogfish") (Britski et al., 1999). ...
The endoparasitic fauna of Acestrorhynchus lacustris from eight marginal lagoons of the upper and middle São Francisco river basin, Brazil, is recorded here for the first time. For this, a total of 106 specimens of A. lacustris were collected. Eighteen helminth species were found. The taxa recorded were phylum Platyhelminthes: one metacercaria of Clinostomum sp. (Trematoda: Clinostomidae) and plerocercoid larvae of unidentified species (Eucestoda: Proteocephalidae gen. sp.); phylum Acanthocephala: juvenile of Quadrigyrus sp.; and phylum Nematoda: larvae of Brevimulticaecum sp., Contracaecum sp. Type1, Contracaecum sp. Type2, Hysterothylacium sp., Gnathostoma sp., Spiroxys sp., juvenile and adult specimens of Freitascapillaria sp., Paracapillaria piscicola, Capillariidae gen. sp., Procamallanus (Spirocamallanus) hilarii, Procamallanus (S.) inopinatus, Procamallanus (S.) saofranciscencis, Travassosnema travassosi paranaensis, Cystidicoloides fischeri and Spinitectus rodolphiheringi. Proteocephalidae gen. sp., Contracaecum sp. Type1 and Travassosnema t. paranaensis were present in all eight lagoons with high parasitic indexes. Proteocephalidae gen. sp., Brevimulticaecum sp., Gnathostoma sp., Freitascapillaria sp., P. piscicola, Capillariidae gen. sp., Procamallanus (S.) hilarii, C. fischeri and S. rodolphiheringi are new records for A. lacustris. The known geographical distribution of Gnathostoma sp., Freitascapillaria sp., P. piscicola, Capillariidae gen. sp., Procamallanus (S.) hilarii and Travassosnema t. paranaensis has now been extended to the São Francisco river basin.
... The Upper Paraguay River Basin (UPRB) located in Central South America is one of the most aquatically diverse watersheds in the world with about 300 fish species described (Britski et al., 2007;Harris et al., 2005;Junk et al., 2006). Although UPRB cover Paraguay, Bolivia, and Brazil, its largest area 361,338 km 2 , 61% is in the Brazilian states of Mato Grosso and Mato Grosso do Sul (Thielen et al., 2020;Fig. ...
Climate change is now recognized as a reality and along with human pressures such as river fragmentation by dams, amplifies the threats to freshwater ecosystems and their biodiversity. In the Brazilian portion of the Upper Paraguay River Basin (UPRB) that encompasses the Pantanal, one of the largest tropical wetlands in the world, in addition to the high biodiversity found there, fisheries are an important ecosystem service mostly supported by migratory fishes. We estimated the current range of migratory fish of commercial interest, also assessing the climate change effects predicted on the distribution patterns. Then, we assessed the effects of future climate on fish richness, and combining species ranges with routes blocked by artificial dams investigated possible impacts on fishery and food security in the UPRB. Climate change will induce range contraction between 47% and 100% for the species analyzed, and only four migratory fish may have suitable habitat until the end-of-century. The local richness will reduce about 85% in the basin. River fragmentation by dams acting together with climate change will prevent upstream shifts for most fish species. About 4% of present range and up to 45% of future range of migratory fish should be blocked by dams in UPRB. Consequently, this will also negatively affect fishery yield and food security in the future.
... In addition to the articles, a reference list was also obtained from books and technical reports. Whenever the information about the taxonomic and native range were not available from our reference list, we have searched for it in the following references: Reis et Britski et al. (2007), and Eschmeyer et al. (2019). ...
Brazil has one of the most significant diversity of freshwater fish in the world, and this drives trade and fishing tourism. Several species of sport fish have characteristics and behaviors that favor fishing tourism and its related activities. Live baits are widely used in fisheries across the country, and at the end of fisheries, is common that anglers may release the remaining bait in rivers, lakes or reservoirs. Here we report for the first time the crab Dilocarcinus pagei in the Paranapanema River basin, and list the freshwater species that were introduced similarly. During field samplings between 2012/2016, and 2018/2019, we captured 10 individuals of D. pagei. One female in the Rosana Reservoir; and two juveniles, one female and six males in the Taquaruçu Reservoir. The literature review revealed 16 species used as live bait, the crab D. pagei and 15 fish species. Gymnotiformes were the largest number of species used as live bait. The basins that had introduction cases were in the Upper Paraná, Iguaçu, and Paraíba do Sul Rivers. The Paraguay-Lower Paraná River was the system that contributed with nine species to the most invaded ecoregion in Brazil, the Upper Paraná River basin. Anglers and live bait farmers should be aware of the risks and consequences of these constant introduction actions (propagule pressure), not releasing baits. In addition, the live bait trade must be monitored and controlled to occur only with species in their original river basin.
... Pantanal is already recognized worldwide as a destination for ecotourism (Arts et al., 2018;Greve, 2014;Mittermeier et al., 2005). The biome's rich biodiversity includes 174 mammal species (Alho et al., 2011), more than 260 fish species (Britski et al., 2007) and more than 580 bird species (Nunes, 2011) which, together with the scenic beauty, have attracted visitors to contemplate nature and observe fauna. ...
This scientometric study aimed to outline an overview of studies on ecotourism in the Pantanal published between 1990 and 2020. In this sense, studies published in the form of books, book chapters and scientific articles in journals were selected. Data were collected using the Web of Science, Scopus and, Science Direct databases, as well as the Google Scholar tool. We identified 36 published works on the subject. In 2020, seven studies were published, this being the year with the largest number of publications. 84% (n = 30) of the works were published in scientific journals, 8% (n = 3) in the form of book chapters and 8% (n = 3) in the form of books. Altogether, 92 authors wrote on the subject, but only 13 of them published at least two works. The highlights were C.J.R. Alho, with 4 publications, followed by R. Hoogesteijn and F. R. Tortato, with 3 each. Among the journals, Ecological Economics was the only one to present 3 articles. The most discussed topics were Ecotourism, Conservation, Biodiversity and Pantanal. Similarly, in the works’ keyword network, the words Pantanal, Conservation, Biodiversity and Tourism stood out.Finally, it is suggested that research institutions and Brazilian tourism associations should increase their partnerships to strengthen the research process on ecotourism in the Pantanal.
O conhecimento sobre ecologia trófica e particionamento de recursos alimentares por aves da região do Pantanal é pouco explorado nos estudos científicos. Desta forma o objetivo deste trabalho foi investigar as relações tróficas por meio de análises sobre partição de recursos alimentares, entre espécies de aves insetívoras de um gradiente longitudinal de mata ripária, na porção norte do Pantanal de Mato Grosso. Os espécimes de aves insetívoras foram capturados com rede de neblina que formaram uma malha de 81m de extensão ao longo de cada ponto. Para análise do conteúdo alimentar os estômagos foram retirados por meio de uma incisão ventral de modo que as presas identificadas foram quantificadas conforme a presença de restos de estruturas não digeríveis e classificadas a nível taxinômico de ordem com auxílio de microscópio estereoscópico e posterirormente acondicionadas em frascos ergométricos contendo álcool 70%. Na análise de dados para o aspecto da dieta foi determinado à importância de cada categoria de presa para posterior ordenamento por meio da Análise de Componentes Principais (PCA) e avaliação da sobreposição das espécies de aves em função dos itens alimentares. Dentre as 14 espécies de aves insetívoras estudadas ocorreram 91 combinações entre os pares de espécies e 33 apresentaram sobreposição acima de 0,90. Os itens alimentares mais consumidos pelas aves estudadas foram insetos pertecentes a ordem Coleoptera, Hyminoptera-Formicidae, Himenoptera, Diptera, Ixodida e Hymenoptera não Formicidae, respectivemante. Os resultados encontrados fornecem uma importante contribuição para o conhecimento da dieta de aves insetívoras que habitam a planície pantaneira.
Callichthyidae são peixes de alto interesse ornamental, devido às suas diversas características morfológicas e rusticidade. No entanto, esses animais podem ser veículos para a disseminação de uma ampla gama de parasitas, alguns dos quais apresentam potencial zoonótico, como os do grupo Myxozoa. Portanto, este estudo realizou uma revisão sistemática de trabalhos publicados entre 1990 e 2022 sobre a fauna parasitária em Callichthyidae em países da América Latina. Foram encontrados 5.141 trabalhos, dos quais 32 artigos foram selecionados. O Brasil é o país da América Latina que possui o maior número de trabalhos relacionados ao tema, sendo os biomas Amazônia e Mata Atlântica aqueles com maior diversidade de parasitas.
A taxonomic review of Triportheus from the Paraná-Paraguai basin was conducted, with four valid species recognized: two natives, one introduced in the upper rio Paraná basin, and one new species described herein. Redescriptions, including osteological characters and detailed coloration patterns, are presented for all recognized species. An update on the distribution of Triportheus species in the Paraná-Paraguai basin is provided, along with discussions regarding introductions in the upper rio Paraná basin and hypothesis of occurrences. In this context, a key for the identification of Triportheus species from the rios Paraná-Paraguai basin is also provided.
O conhecimento sobre ecologia trófica e particionamento de recursos alimentares por aves da região do Pantanal é pouco explorado nos estudos científicos. Desta forma o objetivo deste trabalho foi investigar as relações tróficas por meio de análises sobre partição de recursos alimentares, entre espécies de aves insetívoras de um gradiente longitudinal de mata ripária, na porção norte do Pantanal de Mato Grosso. Os espécimes de aves insetívoras foram capturados com rede de neblina que formaram uma malha de 81m de extensão ao longo de cada ponto. Para análise do conteúdo alimentar os estômagos foram retirados por meio de uma incisão ventral de modo que as presas identificadas foram quantificadas conforme a presença de restos de estruturas não digeríveis e classificadas a nível taxinômico de ordem com auxílio de microscópio estereoscópico e posterirormente acondicionadas em frascos ergométricos contendo álcool 70%. Na análise de dados para o aspecto da dieta foi determinado à importância de cada categoria de presa para posterior ordenamento por meio da Análise de Componentes Principais (PCA) e avaliação da sobreposição das espécies de aves em função dos itens alimentares. Dentre as 14 espécies de aves insetívoras estudadas ocorreram 91 combinações entre os pares de espécies e 33 apresentaram sobreposição acima de 0,90. Os itens alimentares mais consumidos pelas aves estudadas foram insetos pertecentes a ordem Coleoptera, Hyminoptera-Formicidae, Himenoptera, Diptera, Ixodida e Hymenoptera não Formicidae, respectivemante. Os resultados encontrados fornecem uma importante contribuição para o conhecimento da dieta de aves insetívoras que habitam a planície pantaneira.
Informações técnicas sobre o pintado, Pseudoplatystoma corruscans. A espécie tem grande importância econômica, sendo um dos peixes mais consumidos no Brasil. Em conjunto com a espécie congênere Pseudoplatystoma reticulatum (cachara),
já chegaram a totalizar 65% da biomassa pescada no estado de Mato Grosso do Sul, na região do Pantanal (Resende et al., 1995). Pseudoplatystoma corruscans é amplamente procurada por pescadores esportivos, fato que estimula sua criação em cativeiro. Além disso, P. corruscans é utilizada no controle populacional de populações de tilápia, o que pode causar a introdução da espécie em ambientes onde ela não ocorre naturalmente (Birck et al., 2019).
NIJSSEN & ISBRÜCKER (1980) haben im Zuge einer Revision der Gattung Corydoras LACÉPÈDE, 1803 auch die drei Syntypen von Corydoras paleatus (JENYNS, 1842) untersucht und einen Lectotypus festgelegt. Dieser Lectotypus und die beiden Paralectotypen wurden 2006 erneut bearbeitet. Dabei stellte sich heraus, dass das als Lectotypus (BMNH 1917.7.14.18) betrachtete Exemplar nicht der von NIJSSEN & ISBRÜCKER festgelegte Fisch ist und demnach auch kein Exemplar der von DARWIN gesammelten Syntypenserie darstellt. Somit muss der von NIJSSEN & ISBRÜCKER (1980) festgelegte Lectotypus als verschollen gelten. Nachforschungen über den Verbleib des Lectotypus führten zu keinem Ergebnis. Damit wurde die Festlegung eines Neotypus (BMNH 1917.7.14.19) aus den zwei noch verbliebenen Paralectotypen notwendig.
Gymnogeophagus is a genus of fish from the family Cichlidae present in freshwaters from Southern South America, and the knowledge on its parasite communities is rather scarce. Therefore, the present study evaluated, for the first time, the parasite community of G. balzanii. Fish were collected in the Pantanal wetlands, State of Mato Grosso do Sul, Brazil and analysed for metazoan parasites. Ten taxa (larvae and adult) were found including Nematoda (3), Digenea (5), Copepoda (1) and Monogenea (1). All taxa were aggregated within the host population, few showed high prevalence and all had low abundance. The parasite community was composed by few specialists and several generalist and characterised by low richness, diversity and, consequently high dominance of few species and low evenness. These characteristics are typical of isolationist parasite communities. The predominance of larval forms indicates that G. balzanii occupies a lower position within the food chain, acting as an important link for trophic relations. Host length and weight were strong determinants in the parasite community, making fish sex also important since males were significantly longer and heavier than females. Generally, the parasite fauna did not influence host body condition, indicating no apparent debility. Presence of Clinostomum metacercariae is important for human health issues.
Studies on the size spectrum allow indirect inferences of how the energy flows from one organism to another. Assuming that the bottom-up is more intense than the top-down mechanism along the cascade of reservoirs, which limits the growth and development of individuals, we investigated the effect of a cascade of reservoirs in a neotropical basin on the stock and distribution of the population of Oligosarcus longirostris, a species at the top of the food chain. Samples were conducted quarterly in five reservoirs, from March 2004 to December 2008. Stock size was estimated by catch per unit effort (CPUE); to establish the size spectra slopes of fish, we used Pareto I model, and data was analyzed using univariate analysis of variance followed by Tukey's test. There was a higher proportion of smaller individuals in the first reservoir of the cascade, with a decline in this proportion along the succession of reservoirs in the cascade. It can be concluded that there is an effect of the reservoir cascade on the abundance and size of individuals of Oligosarcus longirostris.
The Aquidauana River is one of the most important rivers in the Pantanal region, Brazil. However, its waters have been contaminated by nearby anthropogenic activities, threatening native fish species. In this study, our objectives were: 1) to determine the concentrations of Al, As, Cd, Cu, Fe, Mn, Ni, Pb, and Zn in water and sediment samples from the Aquidauana River and to assess the risks posed to aquatic biota; 2) to quantify the concentration of these elements in muscle and liver tissue samples from four native fish species; 3) to evaluate the potential bioaccumulation of inorganic elements in the muscles and liver; and 4) to investigate genotoxicity biomarkers and their association with the inorganic element concentrations present in the muscle tissue. Water and fish samples were collected in November 2020. The concentrations of Al, As, Cd, Cu, Fe, and Pb in the water samples were in disagreement with the Brazilian legislation and presented risks to the aquatic biota. In terms of mixtures of inorganic elements, there was a great increase in the risk to biota. The As concentration did not meet the Brazilian standard for sediments in the sample collected at sampling site 6. The concentrations of Cd and Pb in the muscle tissue of Hypostomus regani, Prochilodus lineatus, Brycon hilarii, and Mylossoma duriventre exceeded the Brazilian standards for human consumption. H. regani showed greater genotoxic damage, and the higher the Al and Fe concentrations in the muscle tissue, the higher the frequencies of lobulated nuclei and nuclear invaginations. Together, our results demonstrate the negative impacts on native fish species from the Aquidauana River contamination and indicate risks to Pantanal biodiversity.
RESUMEN Bajo el enfoque de zooarqueología he intentado interpretar la estrategia de asentamiento y de adquisición de recursos por los ocupantes del yacimiento RS-LN-279. Este asentamiento datado en 3.310 ± 40 A. P. se vincula a la ocupación pre-ceramista de los pescadores-recolectores de la Costa Norte de RS. En la muestra se destacan, entre los invertebrados, los bivalvos Mesodesma mactroides. Entre los vertebrados los peces marinos tienen mayor representatividad y abundancia con los taxones Genidens sp., Menticirrhus sp., Micropogonias furnieri y Mugil sp. Los reptiles, aves y mamíferos tienen poca representación. Con la configuración de los datos se pone de manifiesto una estrategia de asentamiento y adquisición principalmente direccionada a los recursos provenientes del ambiente marino. Palabras clave: zooarqueología; restos faunísticos; costa norte. ABSTRACT Under the focus of zooarchaeology I sought to interpret the strategy of the settlement and the acquisition of resources by the occupants of the site RS-LN-279. The settlement, dated 3,310 ± 40 BP, represents a pre-ceramic occupation of fishermen and mollusk collectors on the North Coast of RS. In the sample stands out, among the invertebrates, the marine bivalve Mesodesma mactroides. Among the vertebrates, marine fish have greater representativeness and abundance with the taxa Genidens sp., Menticirrhus sp., Micropogonias furnieri and Mugil sp. The reptiles, birds and mammals have little representation. The configuration of the data makes evident a strategy of settlement and acquisition of resources mainly directed to marine environment. Keywords: zooarchaeology; faunal remains; north coast. RESUMO Sob o enfoque da zooarqueologia se buscou interpretar a estratégia de assentamento e captação de recursos desenvolvidos pelos ocupantes do sítio RS-LN-279. Este assentamento datado em 3.310 ± 40 A. P., se vincula á ocupação pré-ceramista por pescadores-coletores no Litoral Norte do RS. Na amostra se destaca entre os invertebrados o bivalve marinho Mesodesma mactroides. Dentre os vertebrados, os peixes marinhos possuem maior representatividade e abundância com os táxons Genidens sp., Menticirrhus sp., Micropogonias furnieri e Mugil sp. Os répteis, aves e mamíferos possuem pouca representatividade. Com a configuração dos dados fica evidenciada uma estratégia de assentamento e captação de recursos voltada principalmente ao ambiente marinho.
RESUMO: O estudo trata de remanescentes faunísticos presentes em sítios arqueológicos da Tradição Guarani e dos ambientes em que os sítios estavam inseridos. Para isto foram comparadas informações publicadas sobre a arqueofauna de 13 sítios da tradição cerâmica Guarani: um de São Paulo, um de Santa Catarina, dez do Rio Grande do Sul e um da Argentina. Há expressiva quantidade de trabalhos publicados tratando principalmente do fabrico ceramista desta população, porém os estudos de vestígios faunísticos de seus assentamentos são raros. O enfoque zooarqueológico da análise de remanescentes faunísticos proporciona conhecimentos sobre padrões de subsistência, de paleoecologia e de formação de sítio. A partir dos dados obtidos sobre a arqueofauna dos sítios foi possível delinear elementos da instalação dessas populações e da exploração dos recursos. Com os resultados fica evidenciada a busca preferencial de recursos em habitats aquáticos e formações florestais. Os dados mostram um padrão de caça seletivo direcionado á mamíferos de porte médio a grande. Com base nos dados e informações ecológicas das espécies identificadas, percebe-se a instalação do assentamento em áreas com formações florestais densas, sempre associadas a corpos hídricos, proporcionando a exploração dos variados ambientes adjacentes à aldeia.
The Paraná River at the flodplain, Ilha Grande National Park region, is formed for a conjunct of islands that form the Ilha Grande fluvial archipelago, and for lagoons and fields periodically overflowed, been this of extreme importance for fishes how natural cradle and alimentation area for much fishes species. This study had how purpose know the diet of Plagioscion squamosissimus specie. In distributed points at Paraná River top at Ilha Grande National Park region, between the mouth of Ivai river and Guaira city. The fishes were shown in bimonthly collections during the period of 01/ October to 02/ August, using wait-fishing nets of different meshes. The stomach of 49 exemplariness with size changing of 9,10 to 30,00 cm, were analyzed using Frequency of Occurrence and Volumetric. The dies analysis show this specie been carnivorous consuming essentially crustaceous, insets and fishes, was verified a ontogenetic variation where the smaller fishes feed them selves with other fishes, the special analysis shown that in lentic ambient (lagoons) there was a major predominance of camaroes and insets, while in canals, gutters and rivers consumed only fishes, the determinate month analyses shown that in hot months the specie consumed with major predominance insets and fishes, and in winter camaroes were exhausted with major intensity.
The ichthyofauna of a large lake located in one of the biggest urban centers in Southern South America was studied for 15 years. Variations in ichthyofauna composition by sampling site and period, as well as the influence of abiotic parameter variations on the fish community, were tested through multivariate statistical analysis. Likewise, alterations in abundance of morphological anomalies by species, sampling site, and sampling period were verified. Fish community structure alterations demonstrated dissimilar levels of environmental quality in different areas, with sampling sites 1 and 4 considered the poorest and sampling sites 2 and 5 the highest environmental quality areas of the lake. Concerning temporal alterations of the fish fauna, species richness varied significantly, and non-native species emerged in the lake along the studied years. Statistical analysis pointed to a significant abundance of morphological anomalies occurring during four periods, as well as in all sampling sites; however, the highest abundance of anomalous specimens and anomaly types had been recorded for sampling site 1, reinforcing its low environmental quality. The use of different parameters of fish community structure and the observation of morphological alterations’ occurrence in integrative analyses can be an accurate tool to diagnose spatial and temporal discrepancies in aquatic environment quality.
The Characiform fish species from the Tapyta Reserve and surrounding area, Caazapa, Paraguay, were inventoried during a year with electrofishing, netting, and trapping. A total of 20 species were registered, being Characidae the richest family. We also report three species as new records to the Paraguayan ichthyofauna and discuss the update of the inventory of fishes from Paraguay.
The Yacyretá Nature Reserve (YNR) is located in the extreme south of Paraguay, to the west of the Yacyretá dam, covering approximately 8,481 hectares. It has lagoons of artificial origin of permanent water, as a result of the removal of earth material for the construction of the Yacyretá Binational Dam on the Paraná River. The objective was to survey the fish fauna present in the inland waters of the YNR. The study was carried out in three sampling stations in internal waters of the YNR developing a single fishing campaign, during the days 16 to 18 September 2017. Eleven species were collected, resulting in 8 new records for the YNR, Corydoras undulatus, Hyphessobrycon eques, Astyanax bimaculatus, Curimatopsis myersi, Pirrulina australis, Hoplerythrinus unitaniatus, Rivulus punctatus y Letacara dorsigera.
Anthropogenic factors have significantly influenced the frequency, duration, and intensity of meteorological drought in many regions of the globe, and the increased frequency of wildfires is among the most visible consequences of human-induced climate change. Despite the fire role in determining biodiversity outcomes in different ecosystems, wildfires can cause negative impacts on wildlife. We conducted ground surveys along line transects to estimate the first-order impact of the 2020 wildfires on vertebrates in the Pantanal wetland, Brazil. We adopted the distance sampling technique to estimate the densities and the number of dead vertebrates in the 39,030 square kilometers affected by fire. Our estimates indicate that at least 16.952 million vertebrates were killed immediately by the fires in the Pantanal, demonstrating the impact of such an event in wet savanna ecosystems. The Pantanal case also reminds us that the cumulative impact of widespread burning would be catastrophic, as fire recurrence may lead to the impoverishment of ecosystems and the disruption of their functioning. To overcome this unsustainable scenario, it is necessary to establish proper biomass fuel management to avoid cumulative impacts caused by fire over biodiversity and ecosystem services.
Reportes científicos de la FACEN, Julio-Diciembre 2021, 12(2): 999-999 2078-399X/2021 Facultad de Ciencias Exactas y Naturales-Universidad Nacional de Asunción, San Lorenzo, Paraguay. Este es un artículo de acceso abierto bajo la licencia CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/deed.es). Resumen: La Reserva Natural Yacyretá (RNY) se encuentra ubicada en el extremo Sur del Paraguay, al oeste de la traza de la represa Yacyretá, abarcando aproximadamente 8.481 hectáreas. Presenta lagunas de origen artificial de agua permanente, producto del retiro de material térreo para la construcción de la Represa Bina-cional Yacyretá sobre el río Paraná. El objetivo fue relevar la fauna íctica presente en las aguas interiores de la RNY. El estudio se realizó en tres estaciones de muestreo en aguas internas de la RNY desarrollándose una sola campaña pesquera, durante los días 16 al 18 de setiembre de 2017. Se colectaron 11 especies, resultando 8 nuevos registros para la RNY, Corydoras undulatus, Hyphessobrycon eques, Astyanax bimaculatus, Curi-matopsis myersi, Pirrulina australis, Hoplerythrinus unitaniatus, Rivulus punctatus y Letacara dorsigera.
Abstract: The Yacyretá Nature Reserve (YNR) is located in the extreme south of Paraguay, to the west of the Yacyretá dam, covering approximately 8,481 hectares. It has lagoons of artificial origin of permanent water, as a result of the removal of earth material for the construction of the Yacyretá Binational Dam on the Paraná River. The objective was to survey the fish fauna present in the inland waters of the YNR. The study was carried out in three sampling stations in internal waters of the YNR developing a single fishing campaign, during the days 16 to 18 September 2017. Eleven species were collected, resulting in 8 new records for the YNR, Corydoras undulatus, Hyphessobrycon eques, Astyanax bimaculatus, Curimatopsis myersi, Pirrulina australis, Hoplerythrinus unitaniatus, Rivulus punctatus y Letacara dorsigera.
O cultivo de Eucalyptus grandis é de grande importância para o setor florestal brasileiro, em especial em áreas de reflorestamento. A incorporação da fração sólida das águas residuária de suinicultura ao solo pode contribuir para melhoria da sua qualidade física, química e biológica, repercutindo no crescimento e qualidade de mudas do eucalipto. Diante da importância da nutrição das plantas tem para com o sistema florestal, neste trabalho procurou-se evidenciar a possibilidade do uso da fração sólida da água residuária da suinocultura no crescimento inicial das mudas de Eucalyptus grandis. O estudo foi conduzido em casa de vegetação da Universidade Federal de Santa Maria, campus de Frederico Westphalen. O delineamento experimental foi inteiramente casualizado, sendo testada a adubação com duas fontes nutricionais: fertilizante mineral (4-18-18) e fertilizante organomineral (2-9-9). Os parâmetros morfológicos das mudas (altura, diâmetro, massa seca da parte aérea e massa seca da raiz) e de qualidade (relação H/MSPA e IQD) foram avaliados após 90 dias do transplante das mudas. Os dados foram submetidos à análise de variância e as médias de tratamentos comparados por meio do teste de F, a 5% de probabilidade de erro. A fração sólida da água residuária de suinocultura apresenta potencial para inserir na composição de fertilizante organomineral, pois possibilitou maior crescimento em altura e em massa seca, além de melhor qualidade das mudas de Eucalyptus grandis em relação ao fertilizante mineral.
PALAVRAS-CHAVE: Eucalyptus grandis, adubação, fração sólida, água residuária de suinocultura.
The Itaipu Hydroelectric Power Plant is the second largest in the world in power generation. The artificial barrier created by its dam imposes an obstacle for fish migration. Thus, in 2002, a fish pass system, named Piracema Channel, was built to allow fish to access areas upstream of the reservoir. We tested the potential of environmental DNA metabarcoding to monitor the impact of both the dam and associated fish pass system in the Paraná River fish communities and to compare it with traditional monitoring methods. Using a fragment of the 12S gene, we characterized richness and community composition based on amplicon sequence variants, operational taxonomic units, and zero-radius OTUs. We combined GenBank and inhouse data for taxonomic assignment. We found that different bioinformatics approaches showed similar results. Also, we found a decrease in fish diversity from 2019 to 2020 probably due to the recent extreme drought experienced in southeastern Brazil. The highest alpha diversity was recorded in the mouth of the fish pass system, located in a protected valley with the highest environmental heterogeneity. Despite the clear indication that the reference databases need to be continuously improved, our results demonstrate the analytical efficiency of the metabarcoding to monitor fish species.
Anthropogenic factors have significantly influenced the frequency, duration, and intensity of meteorological drought in many regions of the globe, and the increased frequency of wildfires is among the most visible consequences of human-induced climate change. Despite its role in determining biodiversity outcomes in different ecosystems, wildfires can cause negative impacts on wildlife. We conducted ground surveys along line transects to estimate the first-order impact of the 2020 wildfires on vertebrates in the Pantanal wetland, Brazil. We adopted the distance sampling technique to estimate the densities and the number of dead vertebrates in the 39,030 square kilometers affected by fire. Our estimates indicate that at least 16.952 million vertebrates were killed immediately by the fires in the Pantanal, demonstrating the impact of such an event in wet savanna ecosystems. The Pantanal case also reminds us that the cumulative impact of widespread burning would be catastrophic, as fire recurrence may lead to the impoverishment of ecosystems and the disruption of their functioning. To overcome this unsustainable scenario, it is necessary to establish proper biomass fuel management to avoid cumulative impacts caused by fire over biodiversity and ecosystem services.
ResearchGate has not been able to resolve any references for this publication.