Erica Caramaschi | Universidade Federal do Rio de Janeiro (UFRJ) (original) (raw)

Papers by Erica Caramaschi

Research paper thumbnail of Dimensões Ecológicas, Geológicas e Humanas em Estudos de Longa-Duração no Parque Nacional da Restinga de Jurubatiba, Rio de Janeiro

Foto da Capa e Contracapa: Romulo Campos CIP-Brasil. Catalogação-na-Fonte Sindicato Nacional dos ... more Foto da Capa e Contracapa: Romulo Campos CIP-Brasil. Catalogação-na-Fonte Sindicato Nacional dos Editores de Livros, RJ É proibida a reprodução total ou parcial, por quaisquer meios, sem autorização por escrito da editora.

Research paper thumbnail of Desafios e Perspectivas na Conservação da Isoëtes cangae

Este livro representa uma exploração profunda e fascinante da biologia da conservação, campo acad... more Este livro representa uma exploração profunda e fascinante da biologia da conservação, campo acadêmico que surgiu em resposta à crescente crise da biodiversidade. Ele combina diversas disciplinas, incluindo ecologia, genética, fisiologia e gestão ambiental para enfrentar os desafios únicos da conservação de uma espécie aquática endêmica ancestral. O livro destaca as espécies endêmicas Isoëtes cangae e Isoëtes serracarajensis, ambas descobertas nos campos rupestres ferruginosos da Floresta Nacional de Carajás. Os lagos aqui abordados são rasos, mas biodiversos, e apresentam características oligotróficas, o que é incomum e, por isso, é habitat de I. cangae. A distribuição limitada de I. cangae a torna uma espécie muito interessante do ponto de vista ecológico e botânico, motivando uma parceria entre o Instituto de Biodiversidade e Sustentabilidade (NUPEM–UFRJ), o Instituto Tecnológico Vale (ITVDS) e a Vale S.A. para conservá-la. O livro discute a abordagem interdisciplinar necessária ...

Research paper thumbnail of Resource use by the facultative lepidophage Roeboides affinis (Günther, 1868): a comparison of size classes, seasons and environment types related to impoundment

Neotropical Ichthyology, Jun 1, 2013

Research paper thumbnail of Energy Flow in Aquatic Communities, Emphasizing Lotic Systems

Oecologia Australis, 2008

Os trabalhos de Lindeman (1942), seguidos pelos trabalhos de Odum (1956, 1957), desperteam o inte... more Os trabalhos de Lindeman (1942), seguidos pelos trabalhos de Odum (1956, 1957), desperteam o interesse de ecólogos sobre questões a cerca da produção biótica e do fl uxo de energia em sistemas aquáticos. A ecologia energética ocupa-se fundamentalmente da forma como a energia transita no interior do sistema. Ao nível ecossistêmico o fl uxo de energia desenvolve uma série de reações químicas que podem liberar ou absorver calor. Essas funções atuam primeiramente ao nível individual, populacional (Odum & Smalley 1959) e, posteriormente, ecossistêmico (Odum 2001). Odum foi o primeiro a desenvolver uma abordagem para medir o estado de maturidade do sistema que era atingido quando observado incremento de biomassa. Essa avaliação termodinâmica media o estágio de maturidade dos ecossistemas, e verifi cava o desempenho de cada componente, alicerçado ao manejo de populações naturais. A aplicação da teoria de Odum pode ser desenvolvida com análises sobre redes trófi cas que permitem quantifi car o estágio de evolução de um ecossistema, através das propriedades emergentes. A ausência de dados quantitativos (biomassa) englobando todos os organismos do ecossistema junto com a difi culdade de se encontrar ferramentas para o desenvolvimento desses trabalhos tem sido uma das principais difi culdades dessas abordagens. A presente revisão tem como objetivo traçar um histórico da ecologia energética em sistemas aquáticos, enfatizando as principais metodologias utilizadas para verifi car o fl uxo de energia nos sistemas ecológicos. Palavras-chave: Ecologia energética, rios, peixes, teias trófi cas ABSTRACT ENERGY FLOW IN AQUATIC COMMUNITIES, EMPHASIZING LOTIC SYSTEMS. A series of studies by Lindeman and Odum attracted scientifi c attention to the matter of biotic production and energy fl ow in aquatic ecosystems. Energy fl ow ecology fundamentally deals with how energy is transferred in a given system. The fl ow of energy generates a series of chemical reactions which may absorb or release heat, and these heat variations occur at the level of the individual, with subsequent effects over the entire population and ecosystem. Odum was the fi rst author to develop a thermodynamic method to measure the state of maturity reached by a given system following biomass increment. This method was used to evaluate the individual performance of each of the ecosystem's parts based on the natural processes intrinsic to populations. Odum's theory can be further developed by including trophic web analysis, thus allowing assessment of the evolutionary stage of ecosystems based on emergent properties. The greatest obstacles for such an approach is the lack of quantitative data (biomass) that would include all organisms of any given ecosystem and the diffi culty in fi nding useful tools to develop these studies. The objective of the present review is to present an historical account of the energy fl ow ecology in aquatic ecosystems, focusing on the main methodologies employed.

Research paper thumbnail of Caracteristicas reprodutivas de hypostomus grupo h. Punctatus no rio ubatiba , marica , rj ( osteichthyes , siluriformes )

Revista Brasileira De Biologia, 1994

Research paper thumbnail of Diagnóstico Pesqueiro Da Ictiofauna Na Lagoa Costeira Cabiúnas, Parque Nacional Da Restinga De Jurubatiba, Rio De Janeiro, Brasil

Arquivos de Ciências do Mar, Nov 1, 2010

Estudos realizados em lagoas costeiras no âmbito do projeto de Pesquisas de Longa Duração (PELD-s... more Estudos realizados em lagoas costeiras no âmbito do projeto de Pesquisas de Longa Duração (PELD-site 5) tiveram como objetivo a aplicação de variadas metodologias visando propostas para o monitoramento padronizado e contínuo da comunidade de peixes nas lagoas do Parque Nacional da Restinga de Jurubatiba (PNRJ). Para tal, neste estudo foram abordadas metodologias referentes a estratégias de amostragem (habitats, aparelhos de captura de peixes e observação subaquática), comparando parâmetros de riqueza, abundância, biomassa e tamanho dos peixes capturados. O esforço de pesca utilizado com a maioria dos aparelhos em diferentes habitats não foi suficiente para estabilizar as curvas acumuladas das espécies, devido possivelmente às coletas terem sido realizadas durante um único período climático ou mês do ano. Valores de biomassa e comprimento padrão mostraram que os aparelhos de pesca utilizados foram adequados para obter amostras heterogêneas da ictiofauna nos diferentes habitats da lagoa. Assim, levando em consideração tamanhos de redes (comprimento, altura e olho de malha), seu uso por habitat disponível na lagoa e esforço de captura (número de lances ou tempo de exposição) é possível obter dados confiáveis para avaliar aspetos relacionados à dinâmica de populações ou estrutura de comunidades em lagoas costeiras com características similares.

Research paper thumbnail of Morphological variation among populations of Hemigrammus coeruleus (Characiformes: Characidae) in a Negro River tributary, Brazilian Amazon

Neotropical Ichthyology, 2017

We explored patterns of phenotypic variation in Hemigrammus coeruleus from the Unini River basin,... more We explored patterns of phenotypic variation in Hemigrammus coeruleus from the Unini River basin, a blackwater river in the Brazilian Amazon. Geometric morphometrics was used to evaluate variation in body shape among populations from four tributaries (UN2-UN5). We found no evidence for sexual dimorphism in body size and shape. However, morphological differences among populations were detected as the analyses recovered significant groups corresponding to each sub-basin, with some overlap among them. The populations from UN2, UN3 and UN5 had more elongate bodies than fish from UN4. The most morphologically divergent population belonged to UN4, the tributary with the most divergent environmental conditions and the only one with seasonally-muddy waters. The morphological variation found among these populations is likely due to phenotypic plasticity or local adaptation, arising as a product of divergent ecological selection pressures among sub-basins. This work constitutes one of the first to employ a population-level geometric morphometric approach to assess phenotypic variation in Amazonian fishes. This method was able to distinguish subtle differences in body morphology, and its use with additional species can bring novel perspectives on the evaluation of general patterns of phenotypic differentiation in the Amazon.

Research paper thumbnail of Longitudinal distribution of Hypostomus punctatus (Osteichthyes, Loricariidae) in a coastal stream from Rio de Janeiro, Southeastern Brazil

Brazilian Archives of Biology and Technology, 2000

Hypostomus punctatus was collected between June/1987 and July/1988, in three sampling stations wi... more Hypostomus punctatus was collected between June/1987 and July/1988, in three sampling stations with different features, along the Ubatiba stream (Maricá, Rio de Janeiro state). Sampling stations 2 and 3 were more similar (50% similarity) to each other. The species was frequent and persistent in all sampling stations. The size varied from 1.0 to 22.2 cm. The occurrence of different size classes along the stream was probably related to the kind of environment. Young forms prevailed in the total sample and were mainly collected next to the submersed riparian vegetation. Adults occurred just in sampling stations 1 and 2, and were found most often in rapids with rocky bottom, and in pools among submersed branches.

Research paper thumbnail of Short-Term Changes in Two Tropical Coastal Lagoons: Effects of Sandbar Openings on Fish Assemblages

Journal of Coastal Research, 2018

ABSTRACT Camara, E.M.; Caramaschi, É.P.; Di Dario, F., and Petry, A.C., 2018. Short-term changes ... more ABSTRACT Camara, E.M.; Caramaschi, É.P.; Di Dario, F., and Petry, A.C., 2018. Short-term changes in two tropical coastal lagoons: Effects of sandbar openings on fish assemblages. Sandbar openings (SBOs) are among the largest possible disturbances in coastal lagoons. This study investigated the mechanisms of the responses of fish assemblages to short-term environmental changes resulting from several SBOs during 1 year in two coastal lagoons in southeastern Brazil. Lagoons were sampled monthly in sites closer to, and more distant from, the sandbars. A principal component analysis summarized limnological differences between periods of contact and isolation from the sea, and site- and lagoon-based variation partitioning and independent redundancy analyses (RDAs) quantified the unique and shared effects of limnology, space, and period on species and groups of species (marine, estuarine, and freshwater). Limnological differences between periods were associated with a higher marine influence during SBOs and an increasingly eutrophic state influenced by the lagoon and days of isolation. Limnology explained most of the variance in composition and abundance of species, and large fractions were shared with, or explained exclusively by, lagoons and distance of sites from the sandbar. The responses of groups of species were less evident in lagoon-based analyses and more associated with trophic state, most likely because of the short intervals between SBOs, which reduced temporal differences in the marine influence. Responses at the group level were more relevant in site-based analyses, given the predominance of species based on their tolerances or affinities in sites with different salinities. Therefore, the responses of groups of species to limnological changes associated with the features of lagoons and sites (e.g., morphometry, human impacts, and freshwater inflow) determined the effects of SBOs on the fish assemblages.

Research paper thumbnail of Ovary maturation stages and oocyte features in three species of the neotropical fish Hemiodus (Müller, 1842)

Brazilian Archives of Biology and Technology, Jun 1, 2003

Research paper thumbnail of Observations on the reproductive biology of female Hypostomus luetkeni Lacepede 1803

Ecology of Freshwater Fish, Mar 1, 1997

— Seasonal observations in the gonadosomatic index and development stages of female ovaries showe... more — Seasonal observations in the gonadosomatic index and development stages of female ovaries showed that Hypostomus luetkeni has an extended spawning period lasting from September to February. Histological examinations and analysis of oocyte size distributions indicated a fractional spawning. Fecundity was determined in ripe ovaries and indicated that H. luetkeni, as most other Loricariidae, spawn a small number (446‐936 eggs‐ind−1) of large eggs (5.2 mm).

Research paper thumbnail of Population responses of two omnivorous fish species to impoundment of a Brazilian tropical river

Hydrobiologia, Feb 26, 2009

Brycon gouldingi and B. falcatus were the most abundant and widespread of five species of the gen... more Brycon gouldingi and B. falcatus were the most abundant and widespread of five species of the genus captured in a sampling study encompassing 5 years (1995–2000) in the upper Rio Tocantins, where the river was impounded by the Serra da Mesa hydroelectric dam. Given that impoundments constitute a disturbance to which species will show demographic and biological responses, we assessed such

Research paper thumbnail of Temporal and spatial distribution of the ichthyofauna in two streams of the upper Rio Paraná basin

Brazilian Archives of Biology and Technology, Mar 1, 2003

Research paper thumbnail of Reproductive biology of the armored catfish Neoplecostomus microps in a coastal Atlantic Forest stream, southeastern Brazil

Aquatic Biology, May 2, 2019

Research paper thumbnail of Alimentacao de Hypostomus emarginatus (Teleostei, Loricariidae) no alto rio Tocantins antes e apos o represamento pela uhe Serra da Mesa, GO

Biociencias (Porto Alegre), 2003

Research paper thumbnail of Dinâmica alimentar de Rhaphiodon vulpinus Agassiz, 1829 (Teleostei, Cynodontidae) no alto Rio Tocantins (GO) em relação ao represamento pela UHE Serra da Mesa

Biota Neotropica, Sep 1, 2009

Feeding dynamics of Rhaphiodon vulpinus Agassiz, 1829 (Teleostei, Cynodontidae) in the upper Toca... more Feeding dynamics of Rhaphiodon vulpinus Agassiz, 1829 (Teleostei, Cynodontidae) in the upper Tocantins River (GO, Brazil) relative to the impoundment by the Serra da Mesa hydroelectric dam. Biota Neotrop.

Research paper thumbnail of Índices De Integridade Biótica Usando Peixes De Água Doce: Uso Nas Regiões Tropical e Subtropical

Oecologia Australis, Oct 1, 2008

utilizando assembléias de peixes de água doce, tem sido uma ferramenta efetiva de biomonitorament... more utilizando assembléias de peixes de água doce, tem sido uma ferramenta efetiva de biomonitoramento amplamente utilizada em países de regiões temperadas. Em países tropicais e subtropicais, no entanto, seu uso é ainda reduzido, apesar da adaptação nestas regiões ter se iniciado há quase 15 anos. Esta revisão inclui 15 adaptações do IIB publicadas para essas regiões. Verifi camos que a maioria delas foi realizada em zonas subtropicais, principalmente em riachos; algumas em rios de maior porte e apenas uma em lagos. Tornou-se evidente a necessidade de uma defi nição clara do local de referência e implementação de metodologias padronizadas e não seletivas (e.g. pesca elétrica), inclusive para rios de grande porte. As métricas foram criadas ou adaptadas usando as famílias ou grupos funcionais que se mostraram sensíveis na região estudada. No entanto, é fundamental que a seleção seja respaldada por métodos estatísticos rigorosos. Apesar do modelo do IIB ter se mostrado efetivo na detecção de alterações ambientais em todos os trabalhos analisados, é evidente que a aplicabilidade e efi cácia nos países tropicais e subtropicais (em geral em desenvolvimento, com grande diversidade e complexidade ecológica) depende do preenchimento das lacunas de informação, tanto sobre diversidade como sobre processos ecológicos. Ressalta-se a importância da participação e coordenação governamental na implantação do biomonitoramento nessas regiões, uma vez que as iniciativas, até o momento, partiram exclusivamente de grupos de pesquisa. Palavras-chave: IIB, índices multimétricos, biomonitoramento, peixes de água doce. ABSTRACT BIOTIC INTEGRITY INDEX USING FRESHWATER FISHES IN TROPICAL AND SUBTROPICAL REGIONS. The Index of Biotic Integrity (IBI) using freshwater fi sh assemblages is an effective biomonitoring tool that is widely used in temperate countries. Despite the fact that the IBI is being adjusted to be applied to studies in tropical and subtropical countries for almost 15 years, it still is rarely used with these regions. The present review visits 15 publications of IBI adaptations for tropical regions. Most studies were performed in subtropical regions and mainly on streams, while some were done in large rivers, and one in lakes. There is evident need for a clear defi nition of the reference condition and for standardized and non-selective methodologies (e.g., electrofi shing), even in large river systems. Metrics were created or adapted using families or functional groups that proved sensitive in the studied regions. However, the metrics must be selected through rigorous statistical methods. Although IBI fi sh models were shown to be effective in detecting environmental changes in all studies analyzed, it is evident that the applicability and effectiveness of these models in tropical and subtropical countries (chiefl y developing countries with high diversity and ecological complexity) depend on fi lling in the informationgaps in diversity and ecological processes. We highlight the importance of government taking part in the coordination of biomonitoring programs within these regions, noting that all the initiatives developed up to now were carried out by research groups.

Research paper thumbnail of Feeding Ecology of Leporinus friderici (Teleostei; Anostomidae) in the Upper Tocantins River, Central Brazil, before and after Installation of a Hydroelectric Plant

Studies on Neotropical Fauna and Environment, Feb 1, 2003

The feeding ecology of Leporinus friderici Bloch, 1794 was investigated in the upper Tocantins Ri... more The feeding ecology of Leporinus friderici Bloch, 1794 was investigated in the upper Tocantins River, before and after its impoundment by the Serra da Mesa Hydroelectric Dam. Leporinus friderici was classified as an euryphagic, omnivorous species. Allochtonous ...

Research paper thumbnail of Trophic guilds in fish assemblages in three coastal lagoons of Rio de Janeiro State (Brazil)

Verhandlungen, Jun 1, 1998

Research paper thumbnail of Ecologia de duas espécies de Pachyurus (Perciformes, Sciaenidae) do rio Tocantins, na região represada pela UHE Serra da Mesa, Goiás

Iheringia Serie Zoologia, Jun 1, 2008

Research paper thumbnail of Dimensões Ecológicas, Geológicas e Humanas em Estudos de Longa-Duração no Parque Nacional da Restinga de Jurubatiba, Rio de Janeiro

Foto da Capa e Contracapa: Romulo Campos CIP-Brasil. Catalogação-na-Fonte Sindicato Nacional dos ... more Foto da Capa e Contracapa: Romulo Campos CIP-Brasil. Catalogação-na-Fonte Sindicato Nacional dos Editores de Livros, RJ É proibida a reprodução total ou parcial, por quaisquer meios, sem autorização por escrito da editora.

Research paper thumbnail of Desafios e Perspectivas na Conservação da Isoëtes cangae

Este livro representa uma exploração profunda e fascinante da biologia da conservação, campo acad... more Este livro representa uma exploração profunda e fascinante da biologia da conservação, campo acadêmico que surgiu em resposta à crescente crise da biodiversidade. Ele combina diversas disciplinas, incluindo ecologia, genética, fisiologia e gestão ambiental para enfrentar os desafios únicos da conservação de uma espécie aquática endêmica ancestral. O livro destaca as espécies endêmicas Isoëtes cangae e Isoëtes serracarajensis, ambas descobertas nos campos rupestres ferruginosos da Floresta Nacional de Carajás. Os lagos aqui abordados são rasos, mas biodiversos, e apresentam características oligotróficas, o que é incomum e, por isso, é habitat de I. cangae. A distribuição limitada de I. cangae a torna uma espécie muito interessante do ponto de vista ecológico e botânico, motivando uma parceria entre o Instituto de Biodiversidade e Sustentabilidade (NUPEM–UFRJ), o Instituto Tecnológico Vale (ITVDS) e a Vale S.A. para conservá-la. O livro discute a abordagem interdisciplinar necessária ...

Research paper thumbnail of Resource use by the facultative lepidophage Roeboides affinis (Günther, 1868): a comparison of size classes, seasons and environment types related to impoundment

Neotropical Ichthyology, Jun 1, 2013

Research paper thumbnail of Energy Flow in Aquatic Communities, Emphasizing Lotic Systems

Oecologia Australis, 2008

Os trabalhos de Lindeman (1942), seguidos pelos trabalhos de Odum (1956, 1957), desperteam o inte... more Os trabalhos de Lindeman (1942), seguidos pelos trabalhos de Odum (1956, 1957), desperteam o interesse de ecólogos sobre questões a cerca da produção biótica e do fl uxo de energia em sistemas aquáticos. A ecologia energética ocupa-se fundamentalmente da forma como a energia transita no interior do sistema. Ao nível ecossistêmico o fl uxo de energia desenvolve uma série de reações químicas que podem liberar ou absorver calor. Essas funções atuam primeiramente ao nível individual, populacional (Odum & Smalley 1959) e, posteriormente, ecossistêmico (Odum 2001). Odum foi o primeiro a desenvolver uma abordagem para medir o estado de maturidade do sistema que era atingido quando observado incremento de biomassa. Essa avaliação termodinâmica media o estágio de maturidade dos ecossistemas, e verifi cava o desempenho de cada componente, alicerçado ao manejo de populações naturais. A aplicação da teoria de Odum pode ser desenvolvida com análises sobre redes trófi cas que permitem quantifi car o estágio de evolução de um ecossistema, através das propriedades emergentes. A ausência de dados quantitativos (biomassa) englobando todos os organismos do ecossistema junto com a difi culdade de se encontrar ferramentas para o desenvolvimento desses trabalhos tem sido uma das principais difi culdades dessas abordagens. A presente revisão tem como objetivo traçar um histórico da ecologia energética em sistemas aquáticos, enfatizando as principais metodologias utilizadas para verifi car o fl uxo de energia nos sistemas ecológicos. Palavras-chave: Ecologia energética, rios, peixes, teias trófi cas ABSTRACT ENERGY FLOW IN AQUATIC COMMUNITIES, EMPHASIZING LOTIC SYSTEMS. A series of studies by Lindeman and Odum attracted scientifi c attention to the matter of biotic production and energy fl ow in aquatic ecosystems. Energy fl ow ecology fundamentally deals with how energy is transferred in a given system. The fl ow of energy generates a series of chemical reactions which may absorb or release heat, and these heat variations occur at the level of the individual, with subsequent effects over the entire population and ecosystem. Odum was the fi rst author to develop a thermodynamic method to measure the state of maturity reached by a given system following biomass increment. This method was used to evaluate the individual performance of each of the ecosystem's parts based on the natural processes intrinsic to populations. Odum's theory can be further developed by including trophic web analysis, thus allowing assessment of the evolutionary stage of ecosystems based on emergent properties. The greatest obstacles for such an approach is the lack of quantitative data (biomass) that would include all organisms of any given ecosystem and the diffi culty in fi nding useful tools to develop these studies. The objective of the present review is to present an historical account of the energy fl ow ecology in aquatic ecosystems, focusing on the main methodologies employed.

Research paper thumbnail of Caracteristicas reprodutivas de hypostomus grupo h. Punctatus no rio ubatiba , marica , rj ( osteichthyes , siluriformes )

Revista Brasileira De Biologia, 1994

Research paper thumbnail of Diagnóstico Pesqueiro Da Ictiofauna Na Lagoa Costeira Cabiúnas, Parque Nacional Da Restinga De Jurubatiba, Rio De Janeiro, Brasil

Arquivos de Ciências do Mar, Nov 1, 2010

Estudos realizados em lagoas costeiras no âmbito do projeto de Pesquisas de Longa Duração (PELD-s... more Estudos realizados em lagoas costeiras no âmbito do projeto de Pesquisas de Longa Duração (PELD-site 5) tiveram como objetivo a aplicação de variadas metodologias visando propostas para o monitoramento padronizado e contínuo da comunidade de peixes nas lagoas do Parque Nacional da Restinga de Jurubatiba (PNRJ). Para tal, neste estudo foram abordadas metodologias referentes a estratégias de amostragem (habitats, aparelhos de captura de peixes e observação subaquática), comparando parâmetros de riqueza, abundância, biomassa e tamanho dos peixes capturados. O esforço de pesca utilizado com a maioria dos aparelhos em diferentes habitats não foi suficiente para estabilizar as curvas acumuladas das espécies, devido possivelmente às coletas terem sido realizadas durante um único período climático ou mês do ano. Valores de biomassa e comprimento padrão mostraram que os aparelhos de pesca utilizados foram adequados para obter amostras heterogêneas da ictiofauna nos diferentes habitats da lagoa. Assim, levando em consideração tamanhos de redes (comprimento, altura e olho de malha), seu uso por habitat disponível na lagoa e esforço de captura (número de lances ou tempo de exposição) é possível obter dados confiáveis para avaliar aspetos relacionados à dinâmica de populações ou estrutura de comunidades em lagoas costeiras com características similares.

Research paper thumbnail of Morphological variation among populations of Hemigrammus coeruleus (Characiformes: Characidae) in a Negro River tributary, Brazilian Amazon

Neotropical Ichthyology, 2017

We explored patterns of phenotypic variation in Hemigrammus coeruleus from the Unini River basin,... more We explored patterns of phenotypic variation in Hemigrammus coeruleus from the Unini River basin, a blackwater river in the Brazilian Amazon. Geometric morphometrics was used to evaluate variation in body shape among populations from four tributaries (UN2-UN5). We found no evidence for sexual dimorphism in body size and shape. However, morphological differences among populations were detected as the analyses recovered significant groups corresponding to each sub-basin, with some overlap among them. The populations from UN2, UN3 and UN5 had more elongate bodies than fish from UN4. The most morphologically divergent population belonged to UN4, the tributary with the most divergent environmental conditions and the only one with seasonally-muddy waters. The morphological variation found among these populations is likely due to phenotypic plasticity or local adaptation, arising as a product of divergent ecological selection pressures among sub-basins. This work constitutes one of the first to employ a population-level geometric morphometric approach to assess phenotypic variation in Amazonian fishes. This method was able to distinguish subtle differences in body morphology, and its use with additional species can bring novel perspectives on the evaluation of general patterns of phenotypic differentiation in the Amazon.

Research paper thumbnail of Longitudinal distribution of Hypostomus punctatus (Osteichthyes, Loricariidae) in a coastal stream from Rio de Janeiro, Southeastern Brazil

Brazilian Archives of Biology and Technology, 2000

Hypostomus punctatus was collected between June/1987 and July/1988, in three sampling stations wi... more Hypostomus punctatus was collected between June/1987 and July/1988, in three sampling stations with different features, along the Ubatiba stream (Maricá, Rio de Janeiro state). Sampling stations 2 and 3 were more similar (50% similarity) to each other. The species was frequent and persistent in all sampling stations. The size varied from 1.0 to 22.2 cm. The occurrence of different size classes along the stream was probably related to the kind of environment. Young forms prevailed in the total sample and were mainly collected next to the submersed riparian vegetation. Adults occurred just in sampling stations 1 and 2, and were found most often in rapids with rocky bottom, and in pools among submersed branches.

Research paper thumbnail of Short-Term Changes in Two Tropical Coastal Lagoons: Effects of Sandbar Openings on Fish Assemblages

Journal of Coastal Research, 2018

ABSTRACT Camara, E.M.; Caramaschi, É.P.; Di Dario, F., and Petry, A.C., 2018. Short-term changes ... more ABSTRACT Camara, E.M.; Caramaschi, É.P.; Di Dario, F., and Petry, A.C., 2018. Short-term changes in two tropical coastal lagoons: Effects of sandbar openings on fish assemblages. Sandbar openings (SBOs) are among the largest possible disturbances in coastal lagoons. This study investigated the mechanisms of the responses of fish assemblages to short-term environmental changes resulting from several SBOs during 1 year in two coastal lagoons in southeastern Brazil. Lagoons were sampled monthly in sites closer to, and more distant from, the sandbars. A principal component analysis summarized limnological differences between periods of contact and isolation from the sea, and site- and lagoon-based variation partitioning and independent redundancy analyses (RDAs) quantified the unique and shared effects of limnology, space, and period on species and groups of species (marine, estuarine, and freshwater). Limnological differences between periods were associated with a higher marine influence during SBOs and an increasingly eutrophic state influenced by the lagoon and days of isolation. Limnology explained most of the variance in composition and abundance of species, and large fractions were shared with, or explained exclusively by, lagoons and distance of sites from the sandbar. The responses of groups of species were less evident in lagoon-based analyses and more associated with trophic state, most likely because of the short intervals between SBOs, which reduced temporal differences in the marine influence. Responses at the group level were more relevant in site-based analyses, given the predominance of species based on their tolerances or affinities in sites with different salinities. Therefore, the responses of groups of species to limnological changes associated with the features of lagoons and sites (e.g., morphometry, human impacts, and freshwater inflow) determined the effects of SBOs on the fish assemblages.

Research paper thumbnail of Ovary maturation stages and oocyte features in three species of the neotropical fish Hemiodus (Müller, 1842)

Brazilian Archives of Biology and Technology, Jun 1, 2003

Research paper thumbnail of Observations on the reproductive biology of female Hypostomus luetkeni Lacepede 1803

Ecology of Freshwater Fish, Mar 1, 1997

— Seasonal observations in the gonadosomatic index and development stages of female ovaries showe... more — Seasonal observations in the gonadosomatic index and development stages of female ovaries showed that Hypostomus luetkeni has an extended spawning period lasting from September to February. Histological examinations and analysis of oocyte size distributions indicated a fractional spawning. Fecundity was determined in ripe ovaries and indicated that H. luetkeni, as most other Loricariidae, spawn a small number (446‐936 eggs‐ind−1) of large eggs (5.2 mm).

Research paper thumbnail of Population responses of two omnivorous fish species to impoundment of a Brazilian tropical river

Hydrobiologia, Feb 26, 2009

Brycon gouldingi and B. falcatus were the most abundant and widespread of five species of the gen... more Brycon gouldingi and B. falcatus were the most abundant and widespread of five species of the genus captured in a sampling study encompassing 5 years (1995–2000) in the upper Rio Tocantins, where the river was impounded by the Serra da Mesa hydroelectric dam. Given that impoundments constitute a disturbance to which species will show demographic and biological responses, we assessed such

Research paper thumbnail of Temporal and spatial distribution of the ichthyofauna in two streams of the upper Rio Paraná basin

Brazilian Archives of Biology and Technology, Mar 1, 2003

Research paper thumbnail of Reproductive biology of the armored catfish Neoplecostomus microps in a coastal Atlantic Forest stream, southeastern Brazil

Aquatic Biology, May 2, 2019

Research paper thumbnail of Alimentacao de Hypostomus emarginatus (Teleostei, Loricariidae) no alto rio Tocantins antes e apos o represamento pela uhe Serra da Mesa, GO

Biociencias (Porto Alegre), 2003

Research paper thumbnail of Dinâmica alimentar de Rhaphiodon vulpinus Agassiz, 1829 (Teleostei, Cynodontidae) no alto Rio Tocantins (GO) em relação ao represamento pela UHE Serra da Mesa

Biota Neotropica, Sep 1, 2009

Feeding dynamics of Rhaphiodon vulpinus Agassiz, 1829 (Teleostei, Cynodontidae) in the upper Toca... more Feeding dynamics of Rhaphiodon vulpinus Agassiz, 1829 (Teleostei, Cynodontidae) in the upper Tocantins River (GO, Brazil) relative to the impoundment by the Serra da Mesa hydroelectric dam. Biota Neotrop.

Research paper thumbnail of Índices De Integridade Biótica Usando Peixes De Água Doce: Uso Nas Regiões Tropical e Subtropical

Oecologia Australis, Oct 1, 2008

utilizando assembléias de peixes de água doce, tem sido uma ferramenta efetiva de biomonitorament... more utilizando assembléias de peixes de água doce, tem sido uma ferramenta efetiva de biomonitoramento amplamente utilizada em países de regiões temperadas. Em países tropicais e subtropicais, no entanto, seu uso é ainda reduzido, apesar da adaptação nestas regiões ter se iniciado há quase 15 anos. Esta revisão inclui 15 adaptações do IIB publicadas para essas regiões. Verifi camos que a maioria delas foi realizada em zonas subtropicais, principalmente em riachos; algumas em rios de maior porte e apenas uma em lagos. Tornou-se evidente a necessidade de uma defi nição clara do local de referência e implementação de metodologias padronizadas e não seletivas (e.g. pesca elétrica), inclusive para rios de grande porte. As métricas foram criadas ou adaptadas usando as famílias ou grupos funcionais que se mostraram sensíveis na região estudada. No entanto, é fundamental que a seleção seja respaldada por métodos estatísticos rigorosos. Apesar do modelo do IIB ter se mostrado efetivo na detecção de alterações ambientais em todos os trabalhos analisados, é evidente que a aplicabilidade e efi cácia nos países tropicais e subtropicais (em geral em desenvolvimento, com grande diversidade e complexidade ecológica) depende do preenchimento das lacunas de informação, tanto sobre diversidade como sobre processos ecológicos. Ressalta-se a importância da participação e coordenação governamental na implantação do biomonitoramento nessas regiões, uma vez que as iniciativas, até o momento, partiram exclusivamente de grupos de pesquisa. Palavras-chave: IIB, índices multimétricos, biomonitoramento, peixes de água doce. ABSTRACT BIOTIC INTEGRITY INDEX USING FRESHWATER FISHES IN TROPICAL AND SUBTROPICAL REGIONS. The Index of Biotic Integrity (IBI) using freshwater fi sh assemblages is an effective biomonitoring tool that is widely used in temperate countries. Despite the fact that the IBI is being adjusted to be applied to studies in tropical and subtropical countries for almost 15 years, it still is rarely used with these regions. The present review visits 15 publications of IBI adaptations for tropical regions. Most studies were performed in subtropical regions and mainly on streams, while some were done in large rivers, and one in lakes. There is evident need for a clear defi nition of the reference condition and for standardized and non-selective methodologies (e.g., electrofi shing), even in large river systems. Metrics were created or adapted using families or functional groups that proved sensitive in the studied regions. However, the metrics must be selected through rigorous statistical methods. Although IBI fi sh models were shown to be effective in detecting environmental changes in all studies analyzed, it is evident that the applicability and effectiveness of these models in tropical and subtropical countries (chiefl y developing countries with high diversity and ecological complexity) depend on fi lling in the informationgaps in diversity and ecological processes. We highlight the importance of government taking part in the coordination of biomonitoring programs within these regions, noting that all the initiatives developed up to now were carried out by research groups.

Research paper thumbnail of Feeding Ecology of Leporinus friderici (Teleostei; Anostomidae) in the Upper Tocantins River, Central Brazil, before and after Installation of a Hydroelectric Plant

Studies on Neotropical Fauna and Environment, Feb 1, 2003

The feeding ecology of Leporinus friderici Bloch, 1794 was investigated in the upper Tocantins Ri... more The feeding ecology of Leporinus friderici Bloch, 1794 was investigated in the upper Tocantins River, before and after its impoundment by the Serra da Mesa Hydroelectric Dam. Leporinus friderici was classified as an euryphagic, omnivorous species. Allochtonous ...

Research paper thumbnail of Trophic guilds in fish assemblages in three coastal lagoons of Rio de Janeiro State (Brazil)

Verhandlungen, Jun 1, 1998

Research paper thumbnail of Ecologia de duas espécies de Pachyurus (Perciformes, Sciaenidae) do rio Tocantins, na região represada pela UHE Serra da Mesa, Goiás

Iheringia Serie Zoologia, Jun 1, 2008