| diverse early life-history strategies in migratory amazonian catfish: implications for conservation and management. | animal migrations provide important ecological functions and can allow for increased biodiversity through habitat and niche diversification. however, aquatic migrations in general, and those of the world's largest fish in particular, are imperiled worldwide and are often poorly understood. several species of large amazonian catfish carry out some of the longest freshwater fish migrations in the world, travelling from the amazon river estuary to the andes foothills. these species are important ap ... | 2015 | 26153984 |
| mercury in muscle and brain of catfish from the madeira river, amazon, brazil. | the central nervous system is a critical target for hg toxicity in all living organisms. total hg (thg) was determined in brain and muscle samples of 165 specimens of eight species of catfish (brachyplatystoma filamentosum; brachyplatystoma platynemum; brachyplatystoma rousseauxii; brachyplatystoma vaillantii; phractocephalus hemiliopterus; pseudoplatystoma punctifer; pseudoplatystoma tigrinum; zungaro zungaro) from the madeira river, brazilian amazon. despite the narrow range of fishbase trophi ... | 2015 | 25913362 |
| calyptospora sp. in brachyplatystoma vaillantii trapped at the vigia, state of pará, brazil. | the article describes the first occurrence of hepatic coccidiosis in catfish of the species brachyplatystoma vaillantii, captured in the coastal region of the vigia city, state of pará, brazil, caused by species of the genus calyptospora, family calyptosporidae. thirty specimens of piramutabas were examined where 60% were infected with liver location, featuring numerous mature and immature oocysts, grouped or isolated, with four sporocysts in pyriform shape. they were described on their morpholo ... | 2013 | 22832762 |