Igor Christo Miyahira- PhD
- Biologist at Federal University of the State of Rio de Janeiro
Igor Christo Miyahira
- PhD
- Biologist at Federal University of the State of Rio de Janeiro
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71
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February 2010 - present
Publications
Publications (71)
The Tocantins river basin was one of the few regions in Brazil considered free of Golden Mussel, Limnoperna fortunei (Dunker, 1857). This is an invasive species that has been dispersing throughout South America since 1990. We report the first record of this species in the state of Tocantins. Its presence there represents a problem in the region and...
The Tocantins river basin was one of the few regions in Brazil considered free of Golden Mussel, Limnoperna fortunei (Dunker, 1857). This is an invasive species that has been dispersing throughout South America since 1990. We report the first record of this species in the state of Tocantins. Its presence there represents a problem in the region and...
Um estudo de revisão das densidades registradas do molusco de água doce, Melanoides tuberculata, amplamente distribuído ao redor do mundo, com o objetivo de compreender a dispersão da espécie, e se ela possui mais facilidade de alcançar maiores densidades em ambientes em que ela é nativa ou invasora. O estudo foi realizado através de uma busca padr...
La Plata Basin, the fifth-largest basin in the world, includes areas of Argentina, Bolivia, Brazil, Paraguay, and Uruguay and is subjected to intensive human activities such as agriculture, mining, and global trade. The basin hosts 83 native bivalves (Hyriidae, Mycetopodidae, Cyrenoididae, and Sphaeriidae), including 29 endemic and at least 3 non-n...
The limited temporal completeness and taxonomic accuracy of species lists, made available in a traditional manner in scientific publications, has always represented a problem. These lists are invariably limited to a few taxonomic groups and do not represent up-to-date knowledge of all species and classification. In this context, the B Brazilian meg...
Cagarras Islands Archipelago, a no-take MPA in Southeast Brazil, was designated as Natural Monument (MONA Cagarras) and, more recently, recognized as Hope Spot for biodiversity conservation. This study aimed to assess plastic contamination by analyzing marine litter and microplastics in MONA Cagarras and surrounding waters. Marine litter (34.12 kg)...
La Plata Basin is the second largest hydrographic system in South America but the most impacted by invasive species of molluscs in the continent. Paraguay is a land-surrounded South American country with scarce information about malacological fauna. To fill some of these gaps, a large field expedition was conducted to analyze the distribution of in...
The golden mussel Limnoperna fortunei is native to Southeast Asia but is now widespread in South America. Limnoperna fortunei is an ecosystem engineer able to change the environment, and also directly affect the native species. Golden mussel grows attached to hard natural and artificial substrata in dense agglomerates, up to 150,000 ind m-2. The ma...
The golden mussel Limnoperna fortunei is native to Southeast Asia but is now widespread in South America. Limnoperna fortunei is an ecosystem engineer able to change the environment, and also directly affect the native species. Golden mussel grows attached to hard natural and artificial substrata in dense agglomerates, up to 150,000 ind m-2. The ma...
The expression ‘you need to know to conserve’ is a well-known cliche among biologists. Documenting the richness of a group of organisms is the first step towards understanding biodiversity and preparing efficient conservation plans. In this context, many efforts have been made to quantify the number of species on Earth and estimate the number of sp...
Mytilopsis leucophaeata is an estuarine bivalve native from the Gulf of Mexico and Southeast USA, and it was introduced in Europe, Asia, Caribbean, South America and Northeast USA, showing massive colonization skills. In Brazil, the single invasion records of M. leucophaeata occur in the city of Rio de Janeiro, i.e., in the Rodrigo de Freitas Lagoo...
The present study aimed to evaluate and compare feeding responses of the non-native and native bivalves, the dark false mussel Mytilopsis leucophaeata and the scorched mussel Brachidontes darwinianus, respectively, by offering different concentrations of seston from the coastal lagoon where these species coexist after dark false mussel introduction...
This study presents a four-year follow-up of an introduced population of Physa acuta Draparnaud, 1805, from initial stages to an established population. This introduction occurred on a small impacted stream of Vila do Abraão, the main village of Ilha Grande (Angra dos Reis, Rio de Janeiro, Brazil). The population size increased during the study,
an...
This paper records the invasive gastropod Melanoides tuberculata in a limnetic ecosystem located in integral protection area in the semiarid region of the state of Paraíba in northeast Brazil. Live individuals were collected and photographed along shallow margins of the Piranhas Reservoir associated with different types of substrates. Photographic...
Nutrient removal and water transparency are ecosystem services often related to bivalves, that also provide other regulating services, provisioning, habitat, and supporting. Eutrophication is one of the main impacts on coastal ecosystems and its negative effects highlighted the bivalve application as a solution to water improvement. Our study aimed...
Bivalves are important components of freshwater ecosystems; however, they are also one of the most threatened animal groups, especially members of the order Unionida. The main threats to freshwater bivalves are habitat modification and invasive species. Protected areas are a common way to minimize impacts and preserve native species, but they are r...
False mussels are recognized as the brackish water equivalent of zebra mussels, although the abiotic and habitat conditions that mediate these invaders’ success are barely known. In this context, we aimed to evaluate the native and non-native geographical distribution of Mytilopsis species worldwide and assess biological traits, environmental condi...
South America is a high biodiversity continent with five out of 13 countries considered megadiverse. Many major groups within this fauna exhibit high diversity, including non-marine molluscs. With at least 1401 known species, South American molluscs are seriously understudied. The aim of this paper is to review the conservation status of non-marine...
p>O Instituto de Pesquisas Jardim Botânico do Rio de Janeiro (JBRJ) completou recentemente 213 anos, sendo uma das instituições mais antigas do Brasil. Além de promover pesquisas e incentivar a Educação Ambiental, por meio do seu acervo, ele abriga uma grande diversidade de plantas nativas e introduzidas acumuladas desde os tempos do império. O JBR...
Mytilopsis leucophaeata is an estuarine bivalve native from the Gulf of Mexico and possibly part of the eastern USA, which invaded many regions around the globe. Despite the previous discovery that two genetic lineages of this species exist, one comprising the northeastern USA and Eurasia and another having invaded South America, there were no gene...
The invasion record for the estuarine bivalve Mytilopsis leucophaeata in Brazil is in Rio de Janeiro city, including the Rodrigo de Freitas Lagoon, where high densities of this invader were registered. This work aimed to (1) assess the composition and structure of the benthic macrofauna associated with this invader in Rodrigo de Freitas Lagoon, (2)...
p>A Floresta Nacional Mário Xavier (FLONA MX) é uma Unidade de Conservação (UC) de uso sustentável localizada no município de Seropédica, região metropolitana do estado do Rio de Janeiro. Foi criada em 1986, e desde então serviu como pioneira na produção de mudas e sementes de espécies nativas e não nativas. Atualmente, o conhecimento da fauna está...
False mussels are recognized as the brackish water equivalent of zebra mussels, although the abiotic and habitat conditions that mediate these invaders’ success are barely known. In this context, we aimed to evaluate the native and non-native geographical distribution of Mytilopsis species worldwide and assess biological traits, environmental condi...
The intermediate disturbance hypothesis (IDH) has been thoroughly investigated, but much controversy has been found for supporting its assumptions, which rely largely on the nature of the disturbance, spatial scale, and biological predictors tested. In this paper, richness of native and non-native species along a suite of Neotropical aquatic ecosys...
Atualmente, o meio ambiente, em especial os rios e córregos, tem passado por diversos processos de degradação. Uma das formas de avaliar esses impactos nos corpos hídricos é a aplicação de Protocolo de Avaliação Rápida (PAR). O PAR consiste na utilização de parâmetros ambientais, usualmente analisados in loco e pontuados de acordo com o estado de c...
Invasive species are one of the main causes of biodiversity loss and the knowledge of their distribution is essential for conservation efforts. The present study inventoried the land and freshwater invasive molluscs of 25 villages of Ilha Grande (Rio de Janeiro, Brazil), an island with Atlantic Rainforest remnants. Three invasive species are found:...
An extensive fi eld survey was conducted to evaluate the spreading of the invasive estuarine bivalve Mytilopsis leucophaeata into the metropolitan region of Rio de Janeiro (Brazil), in which the single invaded site so far recorded is Rodrigo de Freitas Lagoon. A novel record is made to the Marapendi coastal lagoon, where M. leucophaeata mainly colo...
Supplementary Material of Miyahira IC, Pereira LS, dos Santos LN (2020) Non-native freshwater molluscs in the Neotropics: what can be learned from Brazilian reservoirs? Aquatic Invasions 15(3): 455–472, https://doi.org/10.3391/ai.2020.15.3.06
The dark false mussel Mytilopsis leucophaeata occurs as non-native species in Asia, Europe and South America. Despite the low population density usually found in its native range, M. leucophaeata forms dense clusters in newly invaded areas which lead to impacts on local organisms and environment. Some of the impacts of non-native species on newly c...
Keys to Freshwater Neotropical Molluscs
Diplodon granosus was one of the first freshwater mussels to be described for South America. However, the status of the species was confusing for a long time, receiving different taxonomic treatments. In this paper, we redescribe the shell, with new data on the soft parts and information on the distribution and conservation of D. granosus, a rarely...
An updated taxonomic review of Mollusca from the Neotropical regions is presented in this chapter. Dichotomous identification keys to the lowest justifiable taxonomic level based on the most recent literature are provided. These are coupled with the material preparation methods, defined relevant morphological terms, and current limitations in our k...
Freshwater mussels in the tribe Rhipidodontini (Paleoheterodonta: Hyriidae) are among the most diverse in South America. Despite that, many included species are known only from their original descriptions. A search for representatives of Rhipidodontini in eastern and Northeastern coastal rivers in Brazil found 3 species: Diplodon ellipticus Spix in...
The occurrence of Gundlachia radiata is recorded for the first time in the Minas Gerais state, expanding its distribution in southeastern Brazil. We also report the phoresy between this ancylinid and Pomacea lineata and discuss the participation of this ampullariid in the transport and possible dispersion of G. radiata.
The Brazilian Environmental Ministry (MMA) released a report in 2016 listing 163 non-native species into Brazilian inland waters. Reservoirs are among the freshwater habitats most frequently associated with the release of non-native species. Therefore, the aim of the present study was to evaluate the occurrence and distribution of the non-native sp...
The genus Mytilopsis includes some of the most invasive estuarine bivalves in the world, and M. leucophaeata (native to the Gulf of Mexico) and M. sallei (indigenous in the Caribbean Sea) are the most often reported species. Molecular investigations of the COI gene in invasive populations of M. leucophaeata in Europe found only one haplotype, where...
Supplementary Material to “Freshwater mussels from South America:
state of the art of Unionida, specially Rhipidodontini”
Gastropoda é o grupo mais diverso de Mollusca, contudo ainda existem muitas lacunas no conhecimento, e os moluscos terrestres e de água doce são um exemplo. Desta forma, apresentamos o levantamento dos gastrópodes do campus Urca da Universidade Federal do Estado do Rio de Janeiro (UNIRIO), área limítrofe com o Parque Natural Municipal da Paisagem C...
Unionida is the most diverse clade of freshwater bivalves. Among the groups occurring in South America, one with the highest number of species is Rhipidodontini (Hyriidae, Unionida, Paleoheterodonta, Bivalvia). However several issues remains on taxonomy and systematic of this group, leading to problems on species identification, description, as als...
The Guandu River Basin is extremely important to state of Rio de Janeiro, as a water supplier of several municipalities. However, the malacological knowledge and environmental status is not well known to this basin. The aim of this paper is to present an inventory of freshwater mollusks, as well as an environmental assessment through a Rapid Assess...
Pleurolophocercous cercariae found in the invasive gastropod Melanoides tuberculata (Müller, 1774) collected in a stream of the Vila do Abraão, Ilha Grande, Angra dos Reis, Rio de Janeiro, Brazil were used for experimental infection that enabled the identification of the heterophyid trematode Centrocestus formosanus (Nishigori, 1924). The parasite...
On 18 December 2014, the Ministry of Environment of Brasil published the “Official National List of Fauna Threatened with Extinction” (MMA, 2014a) and the “Official National List of Fauna Threatened with Extinction-Fish and Aquatic Invertebrates” (MMA, 2014b). This work was linked to the review of the continental fauna (freshwater and terrestrial)...
Mytilopsis leucophaeata naturally occurs in oligo- to mesohaline estuaries along the Atlantic coast of the USA and Mexico. In Brazil, M. leucophaeata was first recorded in 2004 in estuaries adjacent to the Port of Recife (Pernambuco State, north-eastern Brazil). Here, we present the second record of the species in Brazil, and the first for the sout...
We redescribe type specimens of two freshwater mussels from Brazil, Diplodon ellipticus Spix in Wagner, 1827 and Diplodon expansus (Küster, 1856), focusing on previously unnoticed diagnostic conchological aspects in a brief taxonomical re-view. The first species, represented by one shell previously considered to be lost, was recently rediscovered i...
Based on literature review and malacological collections, 168 native freshwater bivalve and
five invasive species have been recorded for 52 hydrographic regions in South America. The higher
species richness has been detected in the South Atlantic, Uruguay, Paraguay, and Amazon Brazilian
hydrographic regions. Presence or absence data were analysed b...
We report the first records of Gundlachia radiata (Guilding, 1828), a freshwater limpet, from the state of Rio de
Janeiro, which extends its distribution to Southeast Brazil.
The unionids (order Unionoida Stoliczka, 1871) comprise a highly specialized and diverse group among the Bivalvia.
Range extension of Melanoides tuberculata in Ilha Grande
O estudo da helmintofauna associada aos gastrópodes límnicos presentes na Ilha Grande, Angra dos Reis, demonstrou a presença de “Amphistome cercaria”, “Echinostome cercaria” e “Gymnocephalous cercaria”. Tratase do primeiro registro no Brasil de “Gymnocephalous cercaria” em Gundlachia ticaga (Marcus & Marcus, 1962), ancilídeo com a maior abundância...
The freshwater snail Gundlachia ticaga (Marcus & Marcus, 1962) is widely distributed in Brazil, but its morphology has been poorly studied. We compared the shell morphology of samples from four sites (Vila do Abraão, Vila de Provetá, Parnaioca and Praia do Sul) in Ilha Grande (Angra dos Reis, state of Rio de Janeiro) in order to evaluate difference...
A Ilha Grande, situada ao sul do Estado do Rio de Janeiro, possui importantes remanescentes de Floresta Atlântica. Entretanto, o conhecimento sobre sua fauna de invertebrados nao-marinhos ainda e restrito, tanto em abrangencia de grupos taxonomicos como em areas geograficas. Devido a importância de inventarios de biodiversidade para a conservacao e...
Uncancylus concentricus in Rio de Janeiro (Brazil)
Small populations of Melanoides tuberculatus(Müller, 1774) and Biomphalaria tenagophila(d´Orbigny, 1835), were found at Vila do Abraão, being the first record of these species to Ilha Grande, Angra dos Reis, Rio de Janeiro. They were probably introduced after 2004, perhaps following release from aquaria. The possible spread of these species to othe...
