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	Provedor de dados Neotropical Ichthyology (2) Autor Maciel,Thaís Rodrigues (2) Vaz-dos-Santos,André Martins (2) Vianna,Marcelo (2) Barradas,José Ricardo de Souza (1) Caramaschi,Erica Pellegrini (1) Palavra-chave Biphasic growth (1) Catfish (1) Energy allocation (1) Fishery management (1) Growth models (1) Guanabara Bay (1) Lapillus otoliths (1) Morphometric relationships (1) Parental care (1) Reproductive strategy (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2019 (1) 2018 (1) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Sexual dimorphism in the catfish Genidens genidens (Siluriformes: Ariidae) based on otolith morphometry and relative growth Neotropical Ichthyology Maciel,Thaís Rodrigues; Vaz-dos-Santos,André Martins; Barradas,José Ricardo de Souza; Vianna,Marcelo. ABSTRACT Genidens genidens is a species susceptible to population declines in view of their reproductive biology peculiarities. Morphometric differences between sexes are observed in the literature, and these differences should also be evident in otolith development. Growth patterns are one of the most important biological characteristics regarding population dynamics and management. In this context, the aim of the present study is to describe this species relative growth and identify differences between sex life cycles. Somatic growth-otolith growth relationships and somatic length-weight relationships were estimated based on two methodologies; the Huxley and the polyphasic allometric models. Both models demonstrated different growth patterns between... Tipo: Info:eu-repo/semantics/article Palavras-chave: Biphasic growth; Energy allocation; Growth models; Lapillus otoliths; Morphometric relationships. Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252019000100210 Management proposal based on the timing of oral incubation of eggs and juveniles in the sentinel species Genidens genidens (Siluriformes: Ariidae) in a tropical estuary Neotropical Ichthyology Maciel,Thaís Rodrigues; Vaz-dos-Santos,André Martins; Caramaschi,Erica Pellegrini; Vianna,Marcelo. ABSTRACT Ariids such as Genidens genidens are particularly susceptible to overfishing because of their complex reproductive mechanisms, which result in slow replenishment of stocks. In this study, we obtained data about the reproductive ecology of the catfish G. genidens in the Guanabara Bay estuary, Rio de Janeiro, Brazil, providing supporting information for management of its fishery. The sex ratio, mean size of each sex at first sexual maturation, and female fecundity were determined and the reproductive period was characterized. The males:females ratio was 1:2. The fecundity is low and increases proportionally to the females’ growth in total length and weight. The breeding season occurs during the warmest months of the year, with spawning extending... Tipo: Info:eu-repo/semantics/article Palavras-chave: Catfish; Fishery management; Guanabara Bay; Parental care; Reproductive strategy. Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252018000400208 Registros recuperados: 2 Primeira ... 1 ... Última

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