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	Provedor de dados Neotropical Ichthyology (3) Autor Almeida,Vitor Hudson da Consolação (3) Freitas,Tiago Magalhães da Silva (3) Montag,Luciano Fogaça de Assis (3) Fontoura,Nelson Ferreira (2) Rocha,Rossineide Martins da (1) Valente,Roberta de Melo (1) Mais... Palavra-chave Hydrological seasons (2) Amazon (1) Amazonia (1) Auchenipterichthys longimanus (1) Auchenipteridae (1) Catfish (1) Fish reproduction (1) Growth pattern (1) Reproduction (1) Sexual maturity (1) Siluriformes (1) Trophic ecology (1) Mais... Tipo do documento Info:eu-repo/semantics/article (3) Ano 2016 (1) 2011 (2) País Brazil (3) Idioma Inglês (3)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 3 Primeira ... 1 ... Última Predicting size at first sexual maturity from length/weight relationship: a case study with an Amazonian catfish Neotropical Ichthyology Freitas,Tiago Magalhães da Silva; Almeida,Vitor Hudson da Consolação; Montag,Luciano Fogaça de Assis; Fontoura,Nelson Ferreira. ABSTRACT Relationship between length and weight (LWR) is used to describe aspects concerning the life cycle of fish, but does not considers possible changes during the lifetime mainly due to the sexual maturation. Thus, this study aims to identify the size at first maturity of Auchenipterichthys longimanus (Siluriformes: Auchenipteridae) and infer if the reproductive engagement could change growth pattern, concerning the LWR. Estimates of the size at first maturity (L 50 ) were made by visual identification of gonadal development and through the gonadosomatic index (G SI ). L 50 was estimated as 12.5 cm for males and 13.0 cm for females when applied visual identification of gonads development. L 50 estimates increased to 13.05 cm for males and 13.7 cm... Tipo: Info:eu-repo/semantics/article Palavras-chave: Amazonia; Auchenipteridae; Fish reproduction; Growth pattern; Sexual maturity. Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252016000400203 Seasonal changes in the gonadossomatic index, allometric condition factor and sex ratio of an auchenipterid catfish from eastern Amazonia Neotropical Ichthyology Freitas,Tiago Magalhães da Silva; Almeida,Vitor Hudson da Consolação; Montag,Luciano Fogaça de Assis; Rocha,Rossineide Martins da; Fontoura,Nelson Ferreira. The aim of the present study was to evaluate the seasonal pattern of the gonadosomatic index (GSI), condition factor (K), and sex ratio in the catfish Auchenipterichthys longimanus (Siluriformes: Auchenipteridae) as an approach to identify its reproductive period. A total of 589 A. longimanus specimens (251 males and 338 females) were captured in the rivers of the Caxiuanã National Forest, in the Brazilian state of Pará, between July, 2008 and July, 2009. Among the male specimens, 171 were classified as adults and 80 as juveniles, while there were 249 adults and 89 juvenile females. Using a sinusoidal equation, analysis of the GSI revealed a reproductive asynchrony between the genders, with males attaining their highest GSI values in January, while females... Tipo: Info:eu-repo/semantics/article Palavras-chave: Auchenipterichthys longimanus; Hydrological seasons; Reproduction; Siluriformes. Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252011000400015 Feeding ecology of Auchenipterichthys longimanus (Siluriformes: Auchenipteridae) in a riparian flooded forest of Eastern Amazonia, Brazil Neotropical Ichthyology Freitas,Tiago Magalhães da Silva; Almeida,Vitor Hudson da Consolação; Valente,Roberta de Melo; Montag,Luciano Fogaça de Assis. Feeding habits of the midnight catfish Auchenipterichthys longimanus collected in rivers of the Caxiuanã National Forest (Eastern Amazonia, Brazil) were investigated through the different hydrological periods (dry, filing, flood and drawdown). A total of 589 specimens were collected throughout seven samplings between July 2008 and July 2009, of which 74 were young males, 177 adult males, 89 young females and 249 adult females. The diet composition (Alimentary index - Ai%) was analyzed by a non-metric multidimensional scaling (nMDS) and by the analysis of similarity (ANOSIM), which included 37 items grouped into nine categories (Aquatic insects, Other aquatic invertebrates, Arthropods fragment, Fish, Plant fragment, Seeds, Terrestrial insects, Other... Tipo: Info:eu-repo/semantics/article Palavras-chave: Amazon; Catfish; Hydrological seasons; Trophic ecology. Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252011000300016 Registros recuperados: 3 Primeira ... 1 ... Última

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