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	Provedor de dados Neotropical Ichthyology (2) Autor Ballesteros,Tania M. (1) Grothues,Thomas M. (1) Ramírez-Pinilla,Martha P. (1) Reiss,Paul (1) Torres-Mejia,Mauricio (1) Palavra-chave Fat reserves (2) Breeding (1) Characidae (1) Creagrutus guanes (1) Feeding ecology (1) Functional morphology (1) Gonadosomatic index (1) Hepatosomatic index (1) Phenology (1) Physiology (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2015 (1) 2009 (1) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Geometric morphometric analysis of cyclical body shape changes in color pattern variants of Cichla temensis Humboldt, 1821 (Perciformes: Cichlidae) demonstrates reproductive energy allocation Neotropical Ichthyology Reiss,Paul; Grothues,Thomas M.. Previously recognized color and pattern variants of adult Cichla temensis in Amazon flood pulse river environments reflect the cycling of individuals through seasonal sexual maturity and spawning. Individuals also vary in shape from blocky to fusiform. To determine if shape differences are related to patterns of fat reserve deposition and utilization, and to quantify the relationship of shape with color and pattern variation and life history status, specimens in each of four previously defined grades of color and pattern variation were compared using geometric morphometric techniques. Progressive shape changes occurred between grades independent of sex and correlated to gonosomatic index (GSI). Thin plate spline deformation visualizations indicate that the... Tipo: Info:eu-repo/semantics/article Palavras-chave: Fat reserves; Functional morphology; Gonadosomatic index; Hepatosomatic index; Physiology. Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252015000100103 How does diet influence the reproductive seasonality of tropical freshwater fish?: A case study of a characin in a tropical mountain river Neotropical Ichthyology Ballesteros,Tania M.; Torres-Mejia,Mauricio; Ramírez-Pinilla,Martha P.. Seasonal breeding of tropical freshwater fish may be synchronized with periods of high food consumption. We explored this hypothesis by studying the relationship between diet and reproductive activity of Creagrutus guanes (Teleostei, Characidae). Our results showed that C. guanes had a generalist and omnivorous diet dominated by aquatic insects (mainly Diptera larvae) and seeds. Creagrutus guanes did not show intersexual or ontogenetic variation in diet. Peaks of feeding activity during rainy months were not synchronized with breeding in dry months. Our results do not support the hypothesis that the reproductive season has to be synchronized with high food consumption. We discussed the hypothesis fat reserves may be an important factor for the... Tipo: Info:eu-repo/semantics/article Palavras-chave: Feeding ecology; Phenology; Characidae; Fat reserves; Breeding; Creagrutus guanes. Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252009000400019 Registros recuperados: 2 Primeira ... 1 ... Última

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