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	Provedor de dados Neotropical Ichthyology (4) BABT (1) Autor Barreto,Rodrigo Egydio (5) Volpato,Gilson Luiz (2) Carvalho,Robson Francisco (1) Delicio,Helton Carlos (1) Fernandes-de-Castilho,Marisa (1) Giaquinto,Percília Cardoso (1) Gonçalves-de-Freitas,Eliane (1) Junqueira,Maria Fernanda Coelho (1) Kadry,Vivian Oliveira (1) Normandes,Edivaldo Bento (1) Tjui-Yeuw,Tan (1) Mais... Palavra-chave Territoriality (2) Aggression (1) Behavior (1) Betaine (1) Chemical communication (1) Chemoreception (1) Cichlidae (1) Electro-olfactogram (EOG) (1) Estuarine fish (1) Feeding behavior (1) Fighting (1) Fish (1) Growth (1) Intruder-resident paradigm (1) Olfaction (1) Preference test (1) Resource holding power (1) Mais... Tipo do documento Info:eu-repo/semantics/article (4) Info:eu-repo/semantics/other (1) Ano 2015 (1) 2012 (1) 2010 (2) 2006 (1) País Brazil (5) Idioma Inglês (5)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 5 Primeira ... 1 ... Última Bile acids as potential pheromones in pintado catfish Pseudoplatystoma corruscans (Spix & Agassiz, 1829): eletrophysiological and behavioral studies Neotropical Ichthyology Giaquinto,Percília Cardoso; Barreto,Rodrigo Egydio; Volpato,Gilson Luiz; Fernandes-de-Castilho,Marisa; Gonçalves-de-Freitas,Eliane. Bile acids are potent olfactory and gustatory stimulants for fish. Electro-olfactogram recording was used to test whether the olfactory epithelium of pintado catfish Pseudoplatystoma corruscans is specifically sensitive to bile acids, some of which have been hypothesized to function as pheromones. Five out of 30 bile acids that had been pre-screened for olfactory activity in fish were selected. Cross-adaptation experiments demonstrated that sensitivity to bile acids is attributable to at least 3 independent classes of olfactory receptor sites. The taurocholic acid (TCA) and taurochenodeoxycholic acid (TCD) were the most potent compounds. By using avoidance/preference tests, we found that P. corruscans prefers water containing TCA. Bile acids are... Tipo: Info:eu-repo/semantics/article Palavras-chave: Behavior; Electro-olfactogram (EOG); Olfaction; Preference test. Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252015000100237 What tunes aggression in fish during fighting in environments that vary in enrichment? Neotropical Ichthyology Barreto,Rodrigo Egydio. Tipo: Info:eu-repo/semantics/other Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252012000100022 Environmental enrichment reduces aggression of pearl cichlid, Geophagus brasiliensis, during resident-intruder interactions Neotropical Ichthyology Kadry,Vivian Oliveira; Barreto,Rodrigo Egydio. Among fishes, when residents and intruders fight, residents usually win, most likely because they value the residence more than intruders. We hypothesized that enriched environments increase the value of an area in dispute, causing a resident to more fiercely defend a resource-rich environment than a poor one. However, in the present study, intruder-resident tests with the pearl cichlid, Geophagus brasiliensis, showed environmental enrichment actually reduces aggression and can even lead to co-habitation without fighting. Additionally, in our experiments, the prior residence effect occurred irrespective of enrichment condition. Decreased visibility from increased habitat complexity reduces interactions between fish and consequently might explain the lower... Tipo: Info:eu-repo/semantics/article Palavras-chave: Fighting; Territoriality; Intruder-resident paradigm; Resource holding power; Cichlidae. Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252010000200011 Spatial choice is biased by chemical cues from conspecifics in the speckeled worm eel Myrophis punctatus Neotropical Ichthyology Barreto,Rodrigo Egydio; Junqueira,Maria Fernanda Coelho; Tjui-Yeuw,Tan; Volpato,Gilson Luiz. The speckeld worm eel Myrophis punctatus lives in high-densities assemblages, and usually digs through, or lies on the substrate. These behaviours could lead to chemical marks on the substrate and could modulate the spatial distribution in this species. We tested the hypothesis that the spatial choice of the speckled worm eel is modulated by the presence of conspecific odour on the substrate. Here, we showed that the speckled worm eel avoids the substrate area containing the conspecific odour, indicating that this chemical cue modulates the eel's spatial decision. The eels clearly detected the conspecific's odour. This perception might indicate the presence of conspecifics into the substrate. Since the eels avoided an area containing conspecific odour, we... Tipo: Info:eu-repo/semantics/article Palavras-chave: Chemical communication; Chemoreception; Estuarine fish; Territoriality; Aggression. Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252010000400021 Effects of betaine on the growth of the fish piauçu, Leporinus macrocephalus BABT Normandes,Edivaldo Bento; Barreto,Rodrigo Egydio; Carvalho,Robson Francisco; Delicio,Helton Carlos. In this study was tested the effect of betaine on the growth performance of the piauçu fish. For this, twenty-one fish (mean ± SD: body weight: 14.9 ± 1.3 g) were randomly distributed in one out of three experimental treatments (n = 7 each; 1 fish/aquarium): without betaine added in the food (control); 3.6 g betaine/Kg of food; 7.1 g betaine/Kg of food. The fish were exposed to experimental conditions for 60 days. Fish presented significant growth throughout experimentation, but no statistically significant difference was found for any parameter analyzed among the treatments, except for condition factor, which was higher in control group than betaine ones. Accordingly, it was concluded that betaine had no enhancing effect on growth of piauçu. Tipo: Info:eu-repo/semantics/article Palavras-chave: Growth; Betaine; Fish; Feeding behavior. Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132006000600010 Registros recuperados: 5 Primeira ... 1 ... Última

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