Now showing items 1-10 of 14180
The fish fauna in the fish passage at the Ourinhos Dam, Paranapanema River
(SOC BRASILEIRA ICTIOLOGIASAO PAULO, 2012)
The composition and abundance of the fish assemblage were evaluated in the fish ladder of Ourinhos Dam, the newest dam (closed in 2005) in the cascade of dams constructed on the Paranapanema River. Samplings were carried ...
Fish ladders select fish traits on migration - still a growing problem for natural fish populations
(Taylor & Francis Ltd, 2009-01-01)
We investigated the potential selective effect of fish ladders on physiological and morphological profiles of the curimbata, Prochilodus lineatus, during reproductive migration in Brazil. We registered sex, body weight and ...
Perfil hematológico de tilápias-do-nilo alimentadas com die-tas contendo diferentes lipídeos e estimuladas por baixa temperatura
The goal of this paper was to determine the effects of seven diets with differents fatty acids sources in hematology of Nile tilapia before and after cold stimulus. Seven diets, with 3% of fatty acid source, were formulated: ...
Chemical communication of handling stress in fish
(Pergamon-Elsevier B.V. Ltd, 2011-06-01)
We investigated whether juveniles of the nocturnal fish jundia (Rhamdia quelen) and the diurnal fish Nile tilapia (Oreochromis niloticus) are able to chemically communicate stress to conspecifics. Groups of 8 fish were ...
An overview of the ongoing insights in selenium research and its role in fish nutrition and fish health
In the present review, the ongoing researches about selenium research in fish nutrition have been comprehensively discussed. Selenium research is getting popularity in fish nutrition as it is required for the normal growth ...
When does this fish spawn? Fishermen's local knowledge of migration and reproduction of Brazilian coastal fishes
(SpringerNew YorkEUA, 2006)
Low concentrations of glyphosate-based herbicide cause complete loss of sperm motility of yellowtail tetra fish Astyanax lacustris
Environmental relevant concentrations of glyphosate-based herbicide as 50 µg l−1, 300 µg l−1 and 1800 µg l−1 can affect sperm quality of yellowtail tetra fish Astyanax lacustris. Viability of sperm cells was impaired at ...
Energy deficit does not affect immune responses of experimentally infected pacu (Piaractus mesopotamicus)
(Elsevier B.V., 2015-04-01)
We investigated if the energy deficit following a 30-day starvation period could affect the ability of fish to mount immune responses after experimental exposure to Aeromonas hydrophila. Fish were submitted to two feeding ...
Spatial and temporal patterns of diversity and distribution of the Upper Jurua River fish community (Brazilian Amazon)
(Kluwer Academic PublDordrechtHolanda, 2000)