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Reduction of a native fish fauna by alien species: an example from Brazilian freshwater tropical lakes
(Blackwell Publishing, 2004-04-01)
The consequences of introducing Cichla cf. monoculus Spix & Agassiz, Astronotus ocellatus (Agassiz) and Pygocentrus nattereri Kner into lakes in the River Doce basin, Brazil, on richness, diversity and efficiency of aquatic ...
Diversity of fish species in the River Paranapanema Jurumirim Reservoir transition region (São Paulo, Brazil)
(Unione Zoologica Italiana, 1998-01-01)
The diversity of fish species in an transition zone between the River Paranapanema and the head mouth of the Jurumirim Reservoir was evaluated. Fish samples were collected from October 1995 to September 1996, by experimental ...
Testicular ultrastructure and morphology of the seminal pathway in Prochilodus scrofa
(2001-07-01)
The seminiferous tubules of Prochilodus scrofa present a coiled morphological arrangement with intertubular anastomoses and unrestricted spermatogonial distribution. The structural pattern of the seminiferous tubules is ...
Eye color as an indicator of social rank in the fish Nile tilapia
(Associação Brasileira de Divulgação Científica (ABRADIC), 2003-12-01)
We investigated the association of eye color with the dominant-subordinate relationship in the fish Nile tilapia, Oreochromis niloticus. Eye color pattern was also examined in relation to the intensity of attacks. We paired ...
Amino acid composition of processed fish silage using different raw materials
(Elsevier B.V., 2003-03-31)
The objective was to evaluate amino acid composition of silages produced from three raw materials. Commercial marine fish waste, commercial freshwater fish waste, and tilapia filleting residue were used to produce fish ...
Eye color as an indicator of social rank in the fish Nile tilapia
(Associação Brasileira de Divulgação Científica (ABRADIC), 2003-12-01)
We investigated the association of eye color with the dominant-subordinate relationship in the fish Nile tilapia, Oreochromis niloticus. Eye color pattern was also examined in relation to the intensity of attacks. We paired ...
Testicular ultrastructure and morphology of the seminal pathway in Prochilodus scrofa
(2001-07-01)
The seminiferous tubules of Prochilodus scrofa present a coiled morphological arrangement with intertubular anastomoses and unrestricted spermatogonial distribution. The structural pattern of the seminiferous tubules is ...
Diversity of fish species in the River Paranapanema Jurumirim Reservoir transition region (São Paulo, Brazil)
(Unione Zoologica Italiana, 1998-01-01)
The diversity of fish species in an transition zone between the River Paranapanema and the head mouth of the Jurumirim Reservoir was evaluated. Fish samples were collected from October 1995 to September 1996, by experimental ...
Surface-spreading technique of meiotic cells and immunodetection of synaptonemal complex proteins in teleostean fishes
(Biomed Central Ltd, 2015-01-27)
Background: Different moderrn methodologies are presently available to analyze meiotic chromosomes. These methods permit investigation of the behavior of chromosomes in the normal complement and of sex and B chromosomes, ...
Tourism impact on stream fish measured with an ecological and a behavioural indicator
(2017-12-01)
As nature-based tourism grows, its impacts on aquatic ecosystems follow, requiring effective management techniques to conserve river integrity. Nevertheless, strong indicators of tourism impacts are scarce and have seldom ...