Ronaldo Borges Barthem

Ronaldo Borges Barthem
Museu Paraense Emilio Goeldi - MPEG | MPEG · Coordenação de Ciências da Terra e Ecologia (CCTE)

Doctor of Ecology

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71
Publications
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Publications

Publications (71)
Article
Inland fisheries feed greater than 150 million people globally, yet their status is rarely assessed due to their socio-ecological complexity and pervasive lack of data. Here, we leverage an unprecedented landings time series from the Amazon, Earth's largest river basin, together with theoretical food web models to examine (i) taxonomic and trait-ba...
Article
Full-text available
Migratory species are the most important commercial fishes in the Amazon. They are also now the most threatened directly by some combination of overfishing, floodplain deforestation, and dam construction. Limited governmental monitoring and implemented regulations impede adequate management of the fisheries at adequate scale. We summarize the curre...
Article
Full-text available
• The Amazon basin hosts the Earth's highest diversity of freshwater fish. Fish species have adapted to the basin's size and seasonal dynamics by displaying a broad range of migratory behaviour, but they are under increasing threats; however, no study to date has assessed threats and conservation of Amazonian migratory fishes. • Here, the available...
Article
Full-text available
Com o objetivo de inventariar as espécies de peixes dos sistemas hídricos da Floresta Nacional (FLONA) de Caxiuanã (Melgaço/Portel, PA), foram realizadas coletas entre os anos de 1999 e 2004, abrangendo o maior número de ambientes distinguíveis com diversos métodos amostrais. Os métodos utilizados foram redes de tapagem, rede de cerco, rede de espe...
Article
Co-occurrence patterns of species can appear through niche-related processes such as (i) environmental filtering matching specific sets of traits to a given environment, and (ii) limiting similarity selecting divergent functional traits to reduce niche overlap. Locally, both processes should act together to shape the distribution of species. We eva...
Article
Climate‐driven alterations of hydro‐meteorological conditions can change river flow regimes and potentially affect the migration behavior of fishes and the productivity of important fisheries in the Amazon basin, such as those for the continental‐scale migratory goliath catfishes (Brachyplatystoma, Pimelodidae). In this study, we investigated hydro...
Preprint
Full-text available
Cooccurrence patterns of species can appear through niche-related processes such as (i) environmental filtering matching specific sets of traits to a given environment, and (ii) limiting similarity selecting divergent functional traits to reduce niche overlap. Locally, both processes should act together to shape the distribution of species. We eval...
Article
Este estudo comparou a produção pesqueira e a composição de pescado de diferentes tipos de currais, localizados em áreas costeira e fluvial na costa norte do Brasil. Por meio de entrevistas e de observação participativa, monitorou-se a produção de 12 currais, dos tipos coração, enfia e cachimbo. As amostragens foram realizadas a cada despesca por t...
Book
Full-text available
This is a publication of the Brazilian Platform for Biodiversity and Ecosystem Services - BPDES, an initial synthesis of a complex and transdisciplinary theme that is water, seeking to integrate the concept of ecosystem services, the multiple dimensions of water and water security in Brazil.
Article
Full-text available
The Brazilian North coastline comprises a total area of approximately 223,000 km2, representing one of the world’s most essential fishing grounds. Availability of data on the diversity of fishes caught in the industrial fishery trawlers in the region are usually limited to the commercially important and targeted species. Knowledge gaps on the relat...
Article
Full-text available
Gobioides species are abundant large fishes in the Amazon River estuary, with total length greater than 50 cm. Many predatory fish species of fresh, brackish and saltwater eat at least two large species of this genus in the estuary. Qualitative and quantitative analyses of the gut contents of the Gobioides broussonnetti were undertaken in order to...
Book
Full-text available
As águas brasileiras são um componente-chave para o desenvolvimento ambiental, social e econômico do país, mas sua distribuição heterogênea no território e a falta de estratégias que visem a integração de seus usos múltiplos colocam o país em estado de alerta. Neste contexto, este Sumário para Tomadores de Decisão (STD) resume, de forma objetiva, o...
Chapter
Full-text available
Resumo O colapso dos recursos pesqueiros é uma séria ameaça à segurança alimentar e ao bem-estar humano, especialmente da população amazônica. A sobrepesca tem sido considerada a principal causa do colapso das populações de peixes marinhos, no entanto, as pescarias continentais são afetadas por uma combinação deste aspecto e de outros fatores, tais...
Article
The genetic analysis of Brachyplatystoma platynemum individuals sampled from the lower Madeira River reinforces the existence of two structured populations in the Amazon Basin (Madeira and Amazon populations). However, the recapture of an individual from the Amazon population in the Solimões River, which was telemetry‐tagged in the Madeira River af...
Article
Studies of trait–environment relationships provide important tools for the prediction of the response of biological communities to environmental alterations. The Amazon basin presents enormous potential for the development of research on this type of relationship, given the diversity of both its fish fauna and the aquatic ecosystems this fauna inha...
Article
Full-text available
The Brazilian North coastline comprises a total area of approximately 223,000 km2, representing one of the world's most essential fishing grounds. Availability of data on the diversity of fishes caught in the industrial fishery trawlers in the region areusually limited to the commercially important and targeted species. Knowledge gaps on the relate...
Article
Full-text available
Infrastructure development and overfishing in the Amazon make it imperative to de- fine adequate scales for the ecosystem-based management of commercial fisheries and the wetlands on which they depend. We mapped fisheries and fish ecology data from Brazil, Peru, Bolivia and Colombia to an explicit GIS framework of river basins and mainstems. Migr...
Article
Full-text available
Increased energy demand has led to plans for building many new dams in the western Amazon , mostly in the Andean region. Historical data and mechanistic scenarios are used to examine potential impacts above and below six of the largest dams planned for the region, including reductions in downstream sediment and nutrient supplies, changes in downstr...
Data
Relationship between % N in sediments and total suspended sediments (TSS) in the Amazon mainstem and its principal Brazilian tributaries. Unpublished data from CAMREX Project, http://dx.doi.org/10.3334/ORNLDAAC/904. (TIF)
Data
Relationship between particulate P and total suspended sediments (TSS) for the Amazon mainstem and its principal Brazilian tributaries. Unpublished data from CAMREX Project, http://dx.doi.org/10.3334/ORNLDAAC/904. (TIF)
Data
Historical fisheries and flooding data for the Loreto fishing region of Peru. Flooded areas simulated using the MGB-IPH Large Scale Numerical Hydrological Model, developed specifically for the Amazon Basin [67, 68]. Fisheries data supplied by DIREPRO (Dirección Regional de Producción, Peru). TY = total annual fish yield, tons y-1; YFZ = annual fish...
Article
Full-text available
We mapped the inferred long-distance migrations of four species of Amazonian goliath catfishes (Brachyplatystoma rousseauxii, B. platynemum, B. juruense and B. vaillantii) based on the presence of individuals with mature gonads and conducted statistical analysis of the expected long-distance downstream migrations of their larvae and juveniles. By l...
Research
Full-text available
O sistema de monitoramento do ProVárzea/Ibama foi concebido como propósito de acompanhar e avaliar a pesca artesanal e comercial, ao longo da calha dos rios Solimões/Amazonas, levando-se em conta as mudanças decorrentes dessa atividade, em âmbito social, econômico e ambiental na Amazônia. Assim, através de uma abordagem multiinstitucional, foram es...
Article
The Thomas sea catfish is characterized by a highly variable parietosupraoccipital process, which has been recognized as intraspecific variation or phenotypic plasticity. On the basis of this variation, three nominal species have been described, with two of them currently considered to be junior synonyms. Here, the Notarius grandicassis species com...
Article
Full-text available
Fish exhibit morphological, physiological and behavioral specializations which enable them to display diff erent ways to explore the environments and resources. Thus, the aim of this study was to verify how four Auchenipteridae species diff er in the distribution, feeding habits and morphological traits: Auchenipterichthys longimanus (Günther, 1864...
Article
Full-text available
Despite large-scale infrastructure development, deforestation, mining and petroleum exploration in the Amazon Basin, relatively little attention has been paid to the management scale required for the protection of wetlands, fisheries and other aspects of aquatic ecosystems. This is due, in part, to the enormous size, multinational composition and i...
Research
Full-text available
http://inambari.org/ WCS trabaja en la conservación de paisajes desde una visión de gestión integrada del territorio, buscando abordar los impactos acumulativos de grandes proyectos de inversión con información técnica basada en investigación científica. En este marco, presentamos un estudio de caso llevado a cabo en la cuenca del río Inambari (su...
Chapter
Full-text available
In the language of Brazil’s indigenous Munduruku people, “Ocekadi” means “the river of our place.” It is their name for the Tapajós River, which forms the core of their traditional lands in the heart of the Brazilian Amazon. A region of tremendous social and biological diversity, the Tapajós river basin connects two important biomes: the tropical s...
Article
Length-weight relationships (LWR) were determined for seven commercially important species of catfishes (Siluriformes, Ariidae) from the Amazon Coastal Zone (ACZ), Brazil. The analyses included 3628 specimens sampled in three trawling expeditions: dry season of 1996 (111 hauls), rainy season of 1997 (120 hauls), and dry season of 1997 (120 hauls)....
Article
Full-text available
O estudo da ecologia alimentar de peixes é uma abordagem consistente na avaliação dos processos interativos dentro das comunidades. Dessa forma, este trabalho teve como objetivo investigar a ecologia alimentar do bacu-pedra Lithodoras dorsalis em furos próximos no delta do estuário Amazônico (Brasil), uma área sobre influência de macro-marés, em di...
Article
Full-text available
The piramutaba (Brachyplatystoma vaillantii) is an important fishing resource exploited by artisanal and industrial fleets in the Amazon estuary. One of the first measures adopted for management of industrial fishing was its restriction in the area considered natural breeding of the species. Considering the efforts made for the implementation and m...
Article
Full-text available
RESUMO A piramutaba (Brachyplatystoma vaillantii) é um importante recurso pesqueiro explotado pela pesca artesanal e industrial no estuário Amazônico. Uma das primeiras medidas adotadas para o manejo da pesca industrial foi a sua exclusão da área considerada criadouro natural da espécie. Considerando o esforço empregado para a implementação e monit...
Article
Full-text available
Geographical genetics allows the evaluation of evolutionary processes underlying genetic variation within and among local populations and forms the basis for establishing more effective strategies for biodiversity conservation at the population level. In this study, we used explicit spatial analyses to investigate molecular genetic variation (estim...
Article
Full-text available
The tambaqui, Colossoma macropomum, is one of the most commercially valuable Amazonian fish species, and in the floodplains of the region, they are caught in both rivers and lakes. Most growth studies on this species to date have adjusted only one growth model, the von Bertalanffy, without considering its possible uncertainties. In this study, four...
Article
Full-text available
One of the most intriguing patterns of migration and gene flow that affects genetic structure is the reproductive homing behavior of fishes, wherein the adults return to the areas in which they were spawned. Here we reviewed the literature on homing behavior in fish and propose an analytical framework for testing hypotheses regarding this behavior...
Article
Full-text available
The stomach contents of 137 examples of Potamotrygon motoro caught in 3 locations (Muaná, Afuá and Lake Arari) on Marajó Island were analysed. The values of the Index of Relative Importance (IRI) and its respective percentage (%IRI) were calculated. The level of repletion 1 (1/4 full) was the most representative for both sexes, as well as for immat...
Article
Full-text available
RESUMO Os Siluriformes compreendem bagres marinhos e estuarinos, que se distribuem pelas áreas costeiras tropicais e subtropicais, em águas de pouca profundidade, com fundo arenoso ou lodoso. No estuário amazônico, no estado do Pará (Brasil), encontram-se sete espécies, pertencentes aos gêneros Hexanematichthys (H. parkeri, H. couma e H. proops), A...
Article
Full-text available
Os campos alagados ou savanas da ilha do Marajó é uma área disjunta do bioma Cerrado na Amazônia, e é considerada de grande importância para planos de manejo, conservação e preservação ambiental. A fim de ampliar o conhecimento ictiofaunístico da região, o presente estudo reuniu informações coletadas em campo, compiladas da literatura e selecionada...
Article
Full-text available
The flooded areas or savannas of the Marajó island is a fraction of the "Cerrado" biome in the Amazonian, and it is considered of a great importance to management plans, conservation and environmental preservation. In order to increase the knowledge of ichthyofauna from this region, the present study united information collected in other past campa...
Article
Full-text available
Experimental fisheries were carried out at Marajó Island in regions with different environmental characteristics and using various fishing gears. A total of 344 specimens belonging to five described species (Plesiotrygon iwamae, Paratrygon aiereba, Potamotrygon motoro, Potamotrygon orbignyi and Potamotrygon scobina) and to two undescribed species w...
Article
Full-text available
Hoplosternum littorale (Hancock, 1828) (Siluriformes, Callichthyidae) is a middle size catfish, known in the Brazilian Amazon as ‘tamoatá’. It uses an accessory air-breathing organ to live in the poor oxygen swamps of the mouth of Amazon and Orinoco rivers. The tamoatá is the main fishery resource of the Marajó Island and it is caught in the floode...
Article
Full-text available
In order to survey the poorly known fish fauna of the National Forest Caxiuanã, located in the municipalities of Melgaço and Portel, Pará State, Brazil, collections were made between 1999 and 2004, encompassing all distinguishable environments and employing different collecting methods. These methods included: blocking streams, enclosure nets for f...
Article
Full-text available
RESUMO Este estudo descreve a pesca comercial dos "tucunarés" Cichla spp. no Baixo Rio Tocantins-PA, no reservatório da UHE-Tucuruí, em relação às artes de pesca, estratégia dos pescadores, ambientes explorados, sazonalidade e aspectos sociais e econômicos da pesca. Foram realizadas entrevistas com os pescadores e observações diretas em campo. A pe...
Article
Full-text available
IV Resumo: Com o objetivo de inventariar as espécies de peixes dos sistemas hídricos da Floresta Nacional (FLONA) de Caxiuanã (Melgaço/Portel, PA), foram realizadas coletas entre os anos de 1999 e 2004, abrangendo o maior número de ambientes distinguíveis com diversos métodos amostrais. Os métodos utilizados foram redes de tapagem, rede de cerco, r...
Article
Full-text available
This study describes the freshwater fishery based on peacock bass ("tucunare") Cichla spp. in the lower Tocantins River, Para state, northern Brazil, on the reservoir in the Tucurui hydroelectric dam with relation to fishing gear, fishing strategies, utilized environments, seasonality, and appearances sociais and economics from the fishery. Intervi...
Chapter
Full-text available
The Amazon River basin is the largest basin of the planet and contributes about 15% of the total freshwater discharge in the world. Among the environmental concerns, habitat modification is considered the most relevant, since the integrity of the aquatic ecosystems and associated coastal/marine ecosystems are strongly dependent on the preservation...
Article
Full-text available
In this paper we describe the present status of the large migratory catfish fisheries in the Upper Amazon. We present biological information about the main species and we give strong evidence that the stock of piraba (Brachyplatystoma filamentosum),the largest catfish in the Amazon Basin is probably over-exploited. In conclusion, we raise some hypo...
Article
Full-text available
Este trabalho avalia a importância da pesca do tambaqui (Colossoma macropomum) nas bacias dos rios Amazonas e Orinoco e, mais especificamente, na região do médio Solimões. As análises foram baseadas em dados de literatura e da pesca praticada pela frota de Tefé no médio Solimões, coletados no mercado de Tefé, entre 1991 e 1995, e a bordo de embarca...
Article
Full-text available
RESUMEN El conocimiento actual sobre la migración de algunas especies de bagres de la Amazonia sugiere que algunos stocks migran desde el Brasil, área de cría, hasta el área de desove en aguas del Alto Solimões. en territorios brasileños, colombianos y peruanos. Considerando que estos stocks constituyen un recurso económicamente muy importante, est...
Article
Full-text available
This paper presents a review ofali available data on the ecology and economy offisheries in the Brazilian Amazon basin. A description of fisheries, stock assessment oftarget species, policies and problems concerning fish exploitation are discussed. Recommendations for management are given.
Article
In this paper, we present evidence that the long-distance migratory catfish Brachyplatystoma filamentosum, B. flavicans, B. vaillantii, Goslinia platynema and Lithodoras dorsalis spawn in the headstreams of the Amazon river and its tributaries and that the estuary of the Amazon is the main nursery ground utilized by their alevins. The impact of hyd...
Article
Full-text available
To understand the hydrological and limnological conditions during the annual regime of high and low river flow, as well as the action of the tides, a series of 18 collecting trips were conducted in monthly and bimonthly intervals across the Bay of Marajó during the years 1983-1985. The Tocantins River provides more than 80% of the inflow into this...
Article
Full-text available
Rhythmic activity patterns are demonstrated for 15 species of fish in várzea lakes of the Solimões river by analyzing catch per hour-of-day data. Supplemented by visual observation, an array of six gillnets of equal length but different mesh size was used for collecting. The data, in general, show a bimodal pattern of activity. The two peaks of cat...