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	Provedor de dados BABT (2) Zoologia (1) Autor Gomes,Luiz Carlos (2) Abes,Sara da Silva (1) Agostinho,Angelo Antonio (1) Agostinho,Ângelo Antônio (1) Ambrósio,Ângela Maria (1) Delariva,Rosilene Luciana (1) Hahn,Norma Segatti (1) Loureiro,Valdirene Esgarbosa (1) Okada,Edson Kiyoshi (1) Mais... Palavra-chave Itaipu Reservoir (3) Feeding (2) Age (1) Benthophagous (1) Characidae (1) Diet composition (1) Fish (1) Freshwater (1) Growth (1) Hypophthalmus edentatus (1) Otoliths (1) Predation (1) Upper Paraná River (1) Mais... Tipo do documento Info:eu-repo/semantics/article (3) Ano 2003 (1) 2001 (1) 2000 (1) País Brazil (3) Idioma Inglês (3)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 3 Primeira ... 1 ... Última Age and growth of Hypophthalmus edentatus (Spix), (Siluriformes, Hypophthalmidae) in the Itaipu Reservoir, Paraná, Brazil Zoologia Ambrósio,Ângela Maria; Gomes,Luiz Carlos; Agostinho,Ângelo Antônio. Age and growth of Hypophthalmus edentatus (Spix, 1829) (Siluriformes, Hypophthalmidae) was determined. Data were collected from December 1983 to November 1984 and from April 1997 to March 1998 in the Itaipu Reservoir. To evaluate reading consistency, it was analyzed the coefficient of variation of the total length for each annulus observed in the otoliths. Through marginal increment analysis, it was determined that the annuli formed annually (April) indicating that otoliths may be used in the study of age and growth of the species. Food supply was considered the main factor affecting growth and annuli formation in both periods. Back-calculated data were used to assess if the Rosa Lee phenomenon, commom in selective samples like commercial fishing, occured.... Tipo: Info:eu-repo/semantics/article Palavras-chave: Age; Growth; Hypophthalmus edentatus; Itaipu Reservoir; Otoliths. Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752003000200002 Diet of Iheringichthys labrosus (Pimelodidae, Siluriformes) in the Itaipu Reservoir, Paraná River, Brazil-Paraguay BABT Abes,Sara da Silva; Agostinho,Angelo Antonio; Okada,Edson Kiyoshi; Gomes,Luiz Carlos. Iheringichthys labrosus is a secondary commercial fish species in the Itaipu Reservoir, but it is important in other reservoirs of the basin. However, little information exists about this species in the literature. The purpose of this study was to describe the diet of this species in the Itaipu Reservoir. Stomachs of 306 fishes were analyzed, collected from October 1994 to September 1996 in the differents zones of the reservoir (according to a longitudinal gradient). The reservoir was separated into riverine (upper reach), transitional (middle reach), and lacustrine (next to the dam) zones. Main items in the diet of I. labrosus were aquatic insects (mainly Chironomidae) and mollusks (mainly Bivalvia). Their presence in the diet did not vary according to... Tipo: Info:eu-repo/semantics/article Palavras-chave: Itaipu Reservoir; Freshwater; Fish; Feeding; Diet composition; Benthophagous. Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132001000100014 Feeding of Acestrorhynchus lacustris (Characidae): a post impoundment studies on Itaipu reservoir, upper Paraná River, PR BABT Hahn,Norma Segatti; Delariva,Rosilene Luciana; Loureiro,Valdirene Esgarbosa. With objective to know feeding spectrum of Acestrorhynchus lacustris (Reinhardt, 1874), a middle size predator in different places of influence area of Itaipu reservoir, stomach contents were analyzed. Samples were collected from March 1984 to February 1989 from Itaipu Reservoir and its adjacent areas. Its fed mainly on fishes, but it was an opportunistic (consumed 17 species of prey). Despite of the wide feeding spectrum, few preys were dominant in the diet, according to the different habitats sampled. As a result, it significant spatial differences in the diet was observed. Was observed through "Detrented Correspondence Analysis" (DCA) these were divided into three groups in relation with diet: preys from upstream, with higher scores; preys from the... Tipo: Info:eu-repo/semantics/article Palavras-chave: Feeding; Predation; Characidae; Upper Paraná River; Itaipu Reservoir. Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132000000200010 Registros recuperados: 3 Primeira ... 1 ... Última

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