Data/hora: 06/06/2024 02:25:06

Provedor de dados: 	103	
País: 	Brazil	
Título: 	Reproductive biology of the mullet Mugil liza (Teleostei: Mugilidae) in a tropical Brazilian bay	
Autores: 	Albieri,Rafael J.; Araújo,Francisco G.	
Data: 	2010-06-01	
Ano: 	2010	
Palavras-chave: 	Hepatosomatic index; Oocyte development; Spawning; Stock conservation.	
Resumo: 	The reproductive biology of Mugil liza Valenciennes, 1836 is described as a contribution to an elaborate management programm. A total of 243 specimens (89 males and 154 females) were collected in the Sepetiba Bay in south-eastern Brazil from July/2006 to June/2007. The gonadosomatic index (I G) and the sequential development of the ovaries observed through histological studies suggested that the spawning season ranged from May to August. The population reached total sexual maturity (L T100) at 550 and 570 mm total length (L T) for males and females, respectively. Females attained a larger size than males, and the sex ratio was female-biased for fish larger than 500 mm L T. The hepatosomatic index (I H) was significantly related to the I G, indicating that vitellogenesis mobilizes hepatic energy during reproduction. Mean fecundity was 3,080,000 oocytes. The presence of only two phases of oocyte development in ripe ovaries - a reserve stock and a clutch of post-vitellogenic oocytes - indicated that ovarian development is group synchronic and this species is characterized as a total spawner. The results suggest that establishing a closed fishing season from May to August and establishing a minimum size for capture of 350 mm L T would enhance stock conservation and production for future harvest seasons.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702010000300003	
Editor: 	Sociedade Brasileira de Zoologia	
Relação: 	10.1590/S1984-46702010000300003	
Formato: 	text/html	
Fonte: 	Zoologia (Curitiba)  v.27 n.3 2010	
Fonte: 	info:eu-repo/semantics/openAccess