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	Provedor de dados Rev. Bras. Zool. (2) Autor Eutrópio,Frederico J. (2) Gomes,Levy C. (2) Lemos,Gabriela B. (2) Mariante,Fátima L. F. (2) Castro,Rodrigo R. L. (1) Palavra-chave Lunar periodicity (2) Brazil (1) Gametogenesis (1) Gonad index (1) Gonadosomatic Index (1) Reproduction (1) Sazonality (1) Sea urchin (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2010 (1) 2009 (1) País Brazil (2) Idioma Inglês (1) Português (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Biologia reprodutiva de Echinometra lucunter (Echinodermata: Echinoidea) na Praia da Costa, Vila Velha, Espírito Santo Rev. Bras. Zool. Mariante,Fátima L. F.; Lemos,Gabriela B.; Eutrópio,Frederico J.; Gomes,Levy C.. Echinometra lucunter Linnaeus, 1758 is a tropical sea urchin with strong bioerosive potential. Consequently, this species has great ecological importance. The species occurs in high densities along the Brazilian coast, particularly in the south and southeast. The objective of this work was to evaluate both the effects of annual seasonality and the lunar cycle on the reproduction of E. lucunter. Individuals were sampled monthly for a period of one year and during four complete lunar cycles. The gonadosomatic index (GI) was calculated to determine the annual and monthly reproductive peaks based on the lunar phase. The sex ratio (male:female) was 1:1.04, without significant difference in sexual proportion. The GI was significantly higher for males than for... Tipo: Info:eu-repo/semantics/article Palavras-chave: Gonadosomatic Index; Lunar periodicity; Sazonality; Sea urchin. Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702009000400008 Reproductive biology in the starfish Echinaster (Othilia) guyanensis (Echinodermata: Asteroidea) in southeastern Brazil Rev. Bras. Zool. Mariante,Fátima L. F.; Lemos,Gabriela B.; Eutrópio,Frederico J.; Castro,Rodrigo R. L.; Gomes,Levy C.. Echinaster (Othilia) guyanensis Clark, 1987 is an endangered starfish distributed throughout the Caribbean and Atlantic Ocean. Even though it has been extensively harvested, little is known about the biology and ecology of this starfish. Here, we examine reproduction seasonality in E. (O.) guyanensis. Individuals were collected monthly for one year, including four complete lunar phases. The gonad index (GI) was calculated to determine annual and monthly reproductive peaks. Gametogenesis stages were also determined. Sex ratio was 1:1.33 (M:F). Gonadosomatic index, body weight, central disc width and arm length were similar for both sexes. Gonads were present in all animals with arm length greater than 36.2 mm. Lunar phase was not associated with E. (O.)... Tipo: Info:eu-repo/semantics/article Palavras-chave: Brazil; Reproduction; Gametogenesis; Gonad index; Lunar periodicity. Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702010000600010 Registros recuperados: 2 Primeira ... 1 ... Última

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