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	Provedor de dados Zoologia (1) Iheringia, Sér. Zool. (1) Autor Bruschi Junior,Willi (1) Formehl,Márcio Vanini (1) Hartz,Sandra Maria (1) Loureiro,Marcelo (1) Quintans,Federico (1) Scasso,Flavio (1) Yafe,Alejandro (1) Mais... Palavra-chave Gymnogeophagus (2) Brazil (1) Cichlasoma (1) Coastal lagoon (1) Diet (1) Freshwater trophic web (1) Growth (1) Rio Grande do Sul (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2002 (1) 1998 (1) País Brazil (2) Idioma Inglês (1) Português (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Feeding of two Cichlidae species (Perciformes) in an hypertrophic urban lake Iheringia, Sér. Zool. Yafe,Alejandro; Loureiro,Marcelo; Scasso,Flavio; Quintans,Federico. Diet of two cichlid species, Cichlasoma facetum (Jenyns, 1842), and Gymnogeophagus rhabdotus Hensel, 1870, was studied in Rodó Lake, an urban hypertrophic lake in Uruguay. The stomach contents from 192 individuals of C. facetum and 202 of G. rhabdotus, obtained through seasonal sampling in the year 2000, were analyzed. The occurrence frequency and the alimentary importance index of each food item were calculated for each season and size class in both species. Cichlasoma facetum fed upon insects (mainly chironomid larvae and pupae), fish (Cnesterodon decemmaculatus Jenyns, 1842), and vegetals (algae, periphyton and macrophytes debris); large individuals also fed upon the freshwater shrimp Palaemonetes argentinus Nobili, 1901. Gymnogeophagus rhabdotus... Tipo: Info:eu-repo/semantics/article Palavras-chave: Diet; Freshwater trophic web; Cichlasoma; Gymnogeophagus. Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212002000400009 Idade e crescimento de Gymnogeophagus lacustris Reis & Malabarba, um Cichlidae endêmico da bacia hidrográfica do Rio Tramandaí, Rio Grande do Sul, Brasil Zoologia Hartz,Sandra Maria; Bruschi Junior,Willi; Formehl,Márcio Vanini. In the present study it was examined the age and growth of Gymnogeophagus lacustris Reis & Malabarba, 1988 in Caconde lagoon (Tramandaí River Basin). The specimens (1080 males and 267 females) were collected monthly, between July 1992 and June 1993. The growth curve in total length was obtained by von Bettalanffy expression and the weight curve through the dedutive method supported by the mathematical expressions of the length growth curve and the length/weight relationship. Formation of the annulli in scales ocurred between winter and spring, and the first anual ring appears when the animals are aproximately 1.5 years old. L∞ and W∞ obtained for males and females, were 206.6mm and 157.3g and 120.2mm and 30.2g, respectively, demonstrating a... Tipo: Info:eu-repo/semantics/article Palavras-chave: Gymnogeophagus; Growth; Coastal lagoon; Rio Grande do Sul; Brazil. Ano: 1998 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751998000300005 Registros recuperados: 2 Primeira ... 1 ... Última

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