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	Provedor de dados BJMBR (5) Autor Volpato,G.L. (5) Barreto,R.E. (3) Duarte,C.R.A. (2) Luchiari,A.C. (2) Castro,A.L.S. (1) Gonçalves-de-Freitas,E. (1) Oliveira,C. (1) Ramanzini,G.C. (1) Mais... Palavra-chave Aggression (2) Fish (2) Nile tilapia (2) Oreochromis niloticus (2) Social stress (2) Stress (2) Agonistic behavior (1) Animal welfare (1) Chemical cues (1) Cichlid (1) Cortisol (1) Courtship (1) Electroshock (1) Environmental color (1) Eye color (1) Fighting (1) Gonadosomatic index (1) Light color (1) Oreochromis niloticus (L.) (1) Reproduction (1) Mais... Tipo do documento Info:eu-repo/semantics/other (3) Info:eu-repo/semantics/article (2) Ano 2009 (1) 2006 (1) 2004 (1) 2003 (1) 2001 (1) País Brazil (5) Idioma Inglês (5)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 5 Primeira ... 1 ... Última Environmental color affects Nile tilapia reproduction BJMBR Volpato,G.L.; Duarte,C.R.A.; Luchiari,A.C.. We investigated the effects of environmental color on the reproductive behavior of Nile tilapia, Oreochromis niloticus. Two environmental colors were tested by covering the aquarium (60 x 60 x 40 cm) with white (12 groups) or blue (13 groups) cellophane and observing reproductive behavior in groups of 2 males (10.27 ± 0.45 cm) and 3 females (10.78 ± 0.45 cm) each. After assignment to the respective environmental color (similar luminosity = 100 to 120 Lux), the animals were observed until reproduction (identified by eggs in the female's mouth) or up to 10 days after the first nest building. Photoperiod was from 6:00 h to 18:00 h every day. Food was offered in excess once a day and water quality was similar among aquaria. Daily observations were made at... Tipo: Info:eu-repo/semantics/other Palavras-chave: Reproduction; Environmental color; Fish; Nile tilapia; Oreochromis niloticus. Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2004000400004 Visual communication stimulates reproduction in Nile tilapia, Oreochromis niloticus (L.) BJMBR Castro,A.L.S.; Gonçalves-de-Freitas,E.; Volpato,G.L.; Oliveira,C.. Reproductive fish behavior is affected by male-female interactions that stimulate physiological responses such as hormonal release and gonad development. During male-female interactions, visual and chemical communication can modulate fish reproduction. The aim of the present study was to test the effect of visual and chemical male-female interaction on the gonad development and reproductive behavior of the cichlid fish Nile tilapia, Oreochromis niloticus (L.). Fifty-six pairs were studied after being maintained for 5 days under one of the four conditions (N = 14 for each condition): 1) visual contact (V); 2) chemical contact (Ch); 3) chemical and visual contact (Ch+V); 4) no sensory contact (Iso) - males and females isolated. We compared the reproductive... Tipo: Info:eu-repo/semantics/article Palavras-chave: Courtship; Cichlid; Gonadosomatic index; Visual cues; Chemical cues. Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2009000400009 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 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 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 Registros recuperados: 5 Primeira ... 1 ... Última

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