The objective of this work was to present an updated checklist of the currently known fishes in t... more The objective of this work was to present an updated checklist of the currently known fishes in the Paranaguá Estuarine Complex (PEC) and provides comments on conservation status for the treated species. We used a large dataset derived from a pool of studies which have been conducted within there along the last 30 years. Each study was based on monthly samplings and conducted in several estuarine habitat; thus, the pool covers practically all estuarine habitats and takes into account the seasonal cycle in the system. The PEC ichthyofauna represents a mixture between that fauna typical from the tropical Brazilian coast and that with affinities of temperate Argentinean and Uruguayan zones. The PEC harbors a rich fish fauna of 213 species, inserted in the families that are common along the Brazilian coast. Only a minor part (8%) of the PEC fish fauna was evaluated as regards the conservation status, mostly because of the lack of basic biological and ecological information for most spec...
ABSTRACT The goal of this study was to assess the reproductive tactics of the ‘lambari tetra’ (As... more ABSTRACT The goal of this study was to assess the reproductive tactics of the ‘lambari tetra’ (Astyanax minor) in two reservoirs of different age (Iraí Reservoir = 5–6 years old; Passaúna Reservoir = 17–18 years old), both being located in the same geographical region in southern Brazil. Sampling took place monthly from July 2006 to June 2007 in both reservoirs. Collected specimens were identified and their morphometric data measured. The gonads were macroscopically and microscopically analysed. Gonadosomatic Index (GSI) and condition factor results indicate there was a higher reproductive investment in Passaúna Reservoir for both sexes, although with lower total condition. The occurrence of partially spawned ovaries allowed the characterization of partial spawning in both reservoirs. Higher growth rates and the largest individuals were found in Passaúna Reservoir for both sexes, according to length–weight relationships and length class distributions. Significant seasonal sexual rate differences were only detected in Passaúna Reservoir, with male predominance. Total length explained just a small fraction of GSI variability of mature females and males, supporting the hypothesis of local factor influence. It was concluded that this species uses distinct reproductive tactics in each of the two studied reservoirs and that these tactics seem to be reflective of environmental stability.
Polybrominated diphenyl esters are emerging environmental contaminants with few toxicological dat... more Polybrominated diphenyl esters are emerging environmental contaminants with few toxicological data, being a concern for the scientific community. This study evaluated the effects of BDE-47 on the health of Oreochromis niloticus fish. The animals were exposed to three doses of BDE-47 (0, 0.253, 2.53, 25.3 ng. g-1) every 10 days, for 80 days. The BDE-47 affected the hepatosomatic and gonadosomatic index in female and the condition factor by intermediate dose in both sexes. The levels of estradiol decreased and the T4 are increased, but the vitellogenin production was not modulated in male individuals. Changes in AChE, GST, LPO and histopathology were observed while the integrated biomarker response index suggests that the lowest dose of BDE-47 compromised the activity of antioxidant enzymes. The oral exposure to BDE-47 in environmental concentrations is toxic to O. niloticus and the use of multiple biomarkers is an attribution in ecotoxicology studies and biomonitoring programs.
Trophic niche of Dendropsophus minutus (Anura: Hylidae) in southern Brazil. The feeding biology o... more Trophic niche of Dendropsophus minutus (Anura: Hylidae) in southern Brazil. The feeding biology of the Neotropical tree frog Dendropsophus minutus is described based on identification of the items consumed by the anuran. Samples were collected monthly samplings for one year in an Araucaria forest in the state of Paraná in southern Brazil. Of the total of 101 gastrointestines examined, 51 were empty or contained digested remains or plant items. The 50 samples of gastrointestinal contents contained three classes and 10 orders of arthropods. The results suggest that D. minutus is a generalist predator that feeds on arthropods, primarily those in the orders Araneae, Lepidoptera, and Diptera. The diet varies seasonally depending upon prey activity, which determines the breadth of the trophic niche of the frog.
The spatial and temporal distribution of Sphoeroides greeleyi and Sphoeroides testudineus were es... more The spatial and temporal distribution of Sphoeroides greeleyi and Sphoeroides testudineus were established from collections (biological material and environmental data) conducted on a monthly basis from May 2000 to April 2001 in intertidal areas along the north-south axis of the ...
The spatial and temporal distribution of Sphoeroides greeleyi and Sphoeroides testudineus were es... more The spatial and temporal distribution of Sphoeroides greeleyi and Sphoeroides testudineus were established from collections (biological material and environmental data) conducted on a monthly basis from May 2000 to April 2001 in intertidal areas along the north-south axis of the ...
The chola guitarfish, Rhinobatos percellens, is one of the most-captured batoids on the Brazilian... more The chola guitarfish, Rhinobatos percellens, is one of the most-captured batoids on the Brazilian coast, and an important predator of benthic community. Stomachs from R. percellens were sampled in the Paranaguá estuarine complex (March/2006 to March/2007 and October/2008 to September/2009). The stomachs obtained were used for describing the diet of R. percellens, and verifying if there are seasonal and ontogenetic differences in their feeding into the estuarine area. The general analysis showed a specialized diet with a predominance of three species in food contents: Leptochela serratorbita, Caridea remains and Ogyrides alphaerostris. Ontogenetic and seasonal analysis did not reveal significant differences in the food consumption. These data reveal that R. percellens is a specialist predator of L. serratorbita, and this food component is consumed by all size classes.
The spatial and temporal distribution of Sphoeroides greeleyi and Sphoeroides testudineus were es... more The spatial and temporal distribution of Sphoeroides greeleyi and Sphoeroides testudineus were established from collections (biological material and environmental data) conducted on a monthly basis from May 2000 to April 2001 in intertidal areas along the north-south axis of the ...
Resumo: A estrutura populacional e aspectos reprodutivos de Atherinella brasiliensis (Quoy & ... more Resumo: A estrutura populacional e aspectos reprodutivos de Atherinella brasiliensis (Quoy & Gaimard, 1825) foram analisados mensalmente de maio de 2000 a abril de 2001, em oito pontos de ambientes rasos do eixo norte-sul do complexo estuarino de Paranaguá. As ...
Page 1. Revista Brasileira de Zoologia 22 (4): 10221029, dezembro 2005 A baía dos Pinheiros, áre... more Page 1. Revista Brasileira de Zoologia 22 (4): 10221029, dezembro 2005 A baía dos Pinheiros, área de estudo do presente trabalho, lo-caliza-se na porção oriental do complexo estuarino de Paranaguá, Paraná, entre 25 ...
The objective of this work was to present an updated checklist of the currently known fishes in t... more The objective of this work was to present an updated checklist of the currently known fishes in the Paranaguá Estuarine Complex (PEC) and provides comments on conservation status for the treated species. We used a large dataset derived from a pool of studies which have been conducted within there along the last 30 years. Each study was based on monthly samplings and conducted in several estuarine habitat; thus, the pool covers practically all estuarine habitats and takes into account the seasonal cycle in the system. The PEC ichthyofauna represents a mixture between that fauna typical from the tropical Brazilian coast and that with affinities of temperate Argentinean and Uruguayan zones. The PEC harbors a rich fish fauna of 213 species, inserted in the families that are common along the Brazilian coast. Only a minor part (8%) of the PEC fish fauna was evaluated as regards the conservation status, mostly because of the lack of basic biological and ecological information for most spec...
ABSTRACT The goal of this study was to assess the reproductive tactics of the ‘lambari tetra’ (As... more ABSTRACT The goal of this study was to assess the reproductive tactics of the ‘lambari tetra’ (Astyanax minor) in two reservoirs of different age (Iraí Reservoir = 5–6 years old; Passaúna Reservoir = 17–18 years old), both being located in the same geographical region in southern Brazil. Sampling took place monthly from July 2006 to June 2007 in both reservoirs. Collected specimens were identified and their morphometric data measured. The gonads were macroscopically and microscopically analysed. Gonadosomatic Index (GSI) and condition factor results indicate there was a higher reproductive investment in Passaúna Reservoir for both sexes, although with lower total condition. The occurrence of partially spawned ovaries allowed the characterization of partial spawning in both reservoirs. Higher growth rates and the largest individuals were found in Passaúna Reservoir for both sexes, according to length–weight relationships and length class distributions. Significant seasonal sexual rate differences were only detected in Passaúna Reservoir, with male predominance. Total length explained just a small fraction of GSI variability of mature females and males, supporting the hypothesis of local factor influence. It was concluded that this species uses distinct reproductive tactics in each of the two studied reservoirs and that these tactics seem to be reflective of environmental stability.
Polybrominated diphenyl esters are emerging environmental contaminants with few toxicological dat... more Polybrominated diphenyl esters are emerging environmental contaminants with few toxicological data, being a concern for the scientific community. This study evaluated the effects of BDE-47 on the health of Oreochromis niloticus fish. The animals were exposed to three doses of BDE-47 (0, 0.253, 2.53, 25.3 ng. g-1) every 10 days, for 80 days. The BDE-47 affected the hepatosomatic and gonadosomatic index in female and the condition factor by intermediate dose in both sexes. The levels of estradiol decreased and the T4 are increased, but the vitellogenin production was not modulated in male individuals. Changes in AChE, GST, LPO and histopathology were observed while the integrated biomarker response index suggests that the lowest dose of BDE-47 compromised the activity of antioxidant enzymes. The oral exposure to BDE-47 in environmental concentrations is toxic to O. niloticus and the use of multiple biomarkers is an attribution in ecotoxicology studies and biomonitoring programs.
Trophic niche of Dendropsophus minutus (Anura: Hylidae) in southern Brazil. The feeding biology o... more Trophic niche of Dendropsophus minutus (Anura: Hylidae) in southern Brazil. The feeding biology of the Neotropical tree frog Dendropsophus minutus is described based on identification of the items consumed by the anuran. Samples were collected monthly samplings for one year in an Araucaria forest in the state of Paraná in southern Brazil. Of the total of 101 gastrointestines examined, 51 were empty or contained digested remains or plant items. The 50 samples of gastrointestinal contents contained three classes and 10 orders of arthropods. The results suggest that D. minutus is a generalist predator that feeds on arthropods, primarily those in the orders Araneae, Lepidoptera, and Diptera. The diet varies seasonally depending upon prey activity, which determines the breadth of the trophic niche of the frog.
The spatial and temporal distribution of Sphoeroides greeleyi and Sphoeroides testudineus were es... more The spatial and temporal distribution of Sphoeroides greeleyi and Sphoeroides testudineus were established from collections (biological material and environmental data) conducted on a monthly basis from May 2000 to April 2001 in intertidal areas along the north-south axis of the ...
The spatial and temporal distribution of Sphoeroides greeleyi and Sphoeroides testudineus were es... more The spatial and temporal distribution of Sphoeroides greeleyi and Sphoeroides testudineus were established from collections (biological material and environmental data) conducted on a monthly basis from May 2000 to April 2001 in intertidal areas along the north-south axis of the ...
The chola guitarfish, Rhinobatos percellens, is one of the most-captured batoids on the Brazilian... more The chola guitarfish, Rhinobatos percellens, is one of the most-captured batoids on the Brazilian coast, and an important predator of benthic community. Stomachs from R. percellens were sampled in the Paranaguá estuarine complex (March/2006 to March/2007 and October/2008 to September/2009). The stomachs obtained were used for describing the diet of R. percellens, and verifying if there are seasonal and ontogenetic differences in their feeding into the estuarine area. The general analysis showed a specialized diet with a predominance of three species in food contents: Leptochela serratorbita, Caridea remains and Ogyrides alphaerostris. Ontogenetic and seasonal analysis did not reveal significant differences in the food consumption. These data reveal that R. percellens is a specialist predator of L. serratorbita, and this food component is consumed by all size classes.
The spatial and temporal distribution of Sphoeroides greeleyi and Sphoeroides testudineus were es... more The spatial and temporal distribution of Sphoeroides greeleyi and Sphoeroides testudineus were established from collections (biological material and environmental data) conducted on a monthly basis from May 2000 to April 2001 in intertidal areas along the north-south axis of the ...
Resumo: A estrutura populacional e aspectos reprodutivos de Atherinella brasiliensis (Quoy & ... more Resumo: A estrutura populacional e aspectos reprodutivos de Atherinella brasiliensis (Quoy & Gaimard, 1825) foram analisados mensalmente de maio de 2000 a abril de 2001, em oito pontos de ambientes rasos do eixo norte-sul do complexo estuarino de Paranaguá. As ...
Page 1. Revista Brasileira de Zoologia 22 (4): 10221029, dezembro 2005 A baía dos Pinheiros, áre... more Page 1. Revista Brasileira de Zoologia 22 (4): 10221029, dezembro 2005 A baía dos Pinheiros, área de estudo do presente trabalho, lo-caliza-se na porção oriental do complexo estuarino de Paranaguá, Paraná, entre 25 ...
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