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	Provedor de dados BJMBR (4) Autor Barreto,R.E. (4) Volpato,G.L. (3) Carvalho,R.F. (1) Duarte,C.R.A. (1) Luchiari,A.C. (1) Moreira,P.S.A. (1) Ramanzini,G.C. (1) Mais... Palavra-chave Aggression (2) Nile tilapia (2) Oreochromis niloticus (2) Social stress (2) Stress (2) Agonistic behavior (1) Animal welfare (1) Compensatory growth (1) Cortisol (1) Electroshock (1) Eye color (1) Fasting (1) Fighting (1) Fish (1) Light color (1) Mouthbrooding fish (1) Oreochromis niloticus (L.) (1) Sex-related growth (1) Social hierarchy (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Info:eu-repo/semantics/other (2) Ano 2006 (1) 2003 (2) 2001 (1) País Brazil (4) Idioma Inglês (4)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 4 Primeira ... 1 ... Última Sex-specific compensatory growth in food-deprived Nile tilapia BJMBR Barreto,R.E.; Moreira,P.S.A.; Carvalho,R.F.. Female Nile tilapia incubate fertilized eggs in their mouth until they are released as alevins. Consequently, the female may not eat during this period. Thus, it would be expected that female Nile tilapia are more adapted to recovering from fasting than males, which do not display this behavior. To test this hypothesis we conducted an experiment with two groups of fish consisting of 7 males and 7 females each, with one fish per aquarium. The experiment was divided into three phases involving adjustment of the animals to experimental aquaria (0-15th day), fasting (16th-27th day), and refeeding (27th-42nd day). Compensatory growth performance was assessed by specific growth rate, weight, food conversion efficiency and food intake. Food conversion efficiency... Tipo: Info:eu-repo/semantics/article Palavras-chave: Compensatory growth; Fasting; Sex-related growth; Mouthbrooding fish; Nile tilapia; Oreochromis niloticus. Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2003000400009 Eye color as an indicator of social rank in the fish Nile tilapia BJMBR Volpato,G.L.; Luchiari,A.C.; Duarte,C.R.A.; Barreto,R.E.; Ramanzini,G.C.. 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 20 size-matched fish (intruder: 73.69 ± 11.49 g; resident: 75.42 ± 8.83 g) and evaluated eye color and fights. These fish were isolated in individual aquaria for 10 days and then their eye color was measured 5 min before pairing (basal values). Twenty minutes after pairing, eye color and fights were quantified for 10 min. Clear establishment of social hierarchy was observed in 7 of 10 pairs of fish. Number of attacks ranged from 1 to 168 among pairs. The quartile was calculated for these data and the pairs were then divided into two... Tipo: Info:eu-repo/semantics/other Palavras-chave: Aggression; Eye color; Social hierarchy; Social stress; Fish; Oreochromis niloticus. Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2003001200007 Environmental blue light prevents stress in the fish Nile tilapia BJMBR Volpato,G.L.; Barreto,R.E.. The present study aimed to test the effects of blue, green or white light on the stress response of the Nile tilapia, Oreochromis niloticus (L.). Each color was tested on two groups of isolated adult Nile tilapia (8 replicates each): one being subjected to confinement stress, and the other not (control). A different environmental color was imposed on each compartment by covering the light source with cellophane of the respective color (green or blue; no cellophane was used for white light). The intensity of green, white and blue lights was 250, 590 and 250 lux, respectively. Basal plasma cortisol levels were determined for each fish prior to the experimental procedures. The fish were confined by being displaced toward one side of the aquarium using an... Tipo: Info:eu-repo/semantics/other Palavras-chave: Stress; Animal welfare; Light color; Cortisol; Nile tilapia; Oreochromis niloticus (L.). Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2001000800011 Stress responses of the fish Nile tilapia subjected to electroshock and social stressors BJMBR Barreto,R.E.; Volpato,G.L.. Plasma cortisol and glucose levels were measured in 36 adult Nile tilapia males, Oreochromis niloticus (standard length, mean ± SD, 14.38 ± 1.31 cm), subjected to electroshock and social stressors. Pre-stressor levels were determined 5 days after the adjustment of the fish to the experimental aquaria (1 fish/aquarium). Five days later, the effects of stressors on both cortisol and glucose levels were assessed. The following stressors were imposed for 60 min: pairing with a larger resident animal (social stressor), or a gentle electroshock (AC, 20 V, 15 mA, 100 Hz for 1 min every 4 min). Each stressor was tested in two independent groups, one in which stress was quantified immediately after the end of the 60-min stressor imposition (T60) and the other in... Tipo: Info:eu-repo/semantics/article Palavras-chave: Stress; Aggression; Agonistic behavior; Fighting; Social stress; Electroshock. Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2006001200012 Registros recuperados: 4 Primeira ... 1 ... Última

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