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Mostrando ítems 11-20 de 2080
Nile tilapia, Oreochromis niloticus, productive performance and carcass characteristics as related to food management
(2004-12-01)
Male juveniles of Nile tilapia, Oreochromis niloticus, were stocked in 12, 300-m 2 ponds at a density of 1.7 fish/m 2 to evaluate the effects of different food management methods (natural foods and diets in pellet, floating ...
Angling sport fishing in Lobo-Broa reservoir (Itirapina, SP, Brazil)
(Instituto Internacional de Ecologia, 2008-11-01)
O objetivo deste trabalho foi estudar as pescarias esportivas, entre setembro de 2002 e setembro de 2004 na Represa do Lobo-Broa, Itirapina, SP (22° 15' S e 47° 49' W). Foram realizadas 1.027 entrevistas junto aos pescadores ...
Early social environment and the fighting behaviour of young Oreochromis niloticus (Pisces, Cichlidae)
(Brill Academic Publishers, 1998-10-01)
This study examines the influence of early experience with different forms of aggressive behaviour on the fighting behaviour of young fish. Fry of the cichlid fish, Oreochromis niloticus, were raised from hatching in small ...
Chemical communication, aggression, and conspecific recognition in the fish Nile tilapia
(Elsevier B.V., 1997-12-01)
The chemical modulation of agonistic behavior and conspecific recognition were tested in juveniles of the fish Nile tilapia, Oreochromis niloticus (L.). After a 7-day isolation period, the fish were grouped (four individuals ...
Caracterização da piscicultura na microrregião da baixada cuiabana, Mato Grosso, Brasil
(Inst Pesca, 2011-01-01)
The objective of this study was to characterize the fish farms located in the lowland micro region in Cuiaba, MT, through interviews with 26 selected farmers which represent the universe of fish farms that are active. ...
Two 5S rDNA arrays in Neotropical fish species: is it a general rule for fishes ?
(Kluwer Academic Publ, 2001-01-01)
In this paper we describe Southern blot hybridization results probed with 5S rRNA genes for several Neotropical fish species representing different taxonomic groups. All the studied species showed a general trend with the ...
Challenges in Assessing Fish Welfare
(Inst Laboratory Animal Research, Natl Res Council, 2009-01-01)
Descriptions of feeling states in nonhuman animals have relied on indirect evidence from empirical data. Assumptions that fish do not experience suffering lack evidence and in fact contradict a large body of indirect ...
Genetics of neotropical fish: from chromosomes to populations
(Springer, 2009-03-01)
The Neotropical freshwater fish fauna is very rich-according to the most recent catalogue 71 families and 4,475 species have been described. However, only a small amount of general information is available on the composition ...
Influence of artificial reefs on fish assemblage of the Barra Bonita Reservoir (São Paulo, Brazil)
(2001-12-01)
This paper deals with the effects of introduced artificial reefs on the diversity of freshwater fish communities in lentic and lotic zones of a very impacted river in southeastern Brazil. To accomplish this goal, artificial ...
Fish cytogenetic research: Advances, applications and perspectives
(1991-12-01)
Methods developed since 1976 for harvesting, preparing and banding fish chromosomes are now commonly used for taxonomic and phylogenetic studies, genetic control and chromosome manipulations in fish breeding and in monitoring ...