Data/hora: 01/06/2024 01:46:55

Provedor de dados: 	104	
País: 	Brazil	
Título: 	Reproductive cycle of Mellita quinquiesperforata (Leske) (Echinodermata, Echinoidea) in two contrasting beach environments	
Autores: 	Tavares,Yara A. G.; Borzone,Carlos A.	
Data: 	2006-06-01	
Ano: 	2006	
Palavras-chave: 	Reproductive plasticity; Sand dollar; Sandy beach.	
Resumo: 	The reproductive cycle of the irregular echinoid Mellita quinquiesperforata (Leske, 1778) was studied in populations from two sand beaches with different morphodynamic conditions in Parana coast, from February 1992 through July 1994. Gametogenesis was described by histological and gonad index methods and the differences between both populations were observed in the extension of nutrient storage and spawning period. Both populations exhibited a main reproductive period during spring/summer and a nutrient storage period during autumn/winter months. The spawning period at the intermediate-dissipative beach was shorter than at the reflective beach. Meanwhile, a nutrient storage stage was more extensive in the latter. Gonad index varied between both sexes and it was influenced by population characteristics. Different strategies in allocation of resources between maintenance and reproduction effort (oocyte size) confirm the high adaptive plasticity developed by this species to live in contrasting beach environments.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752006000200033	
Editor: 	Sociedade Brasileira de Zoologia	
Relação: 	10.1590/S0101-81752006000200033	
Formato: 	text/html	
Fonte: 	Revista Brasileira de Zoologia  v.23 n.2 2006	
Fonte: 	info:eu-repo/semantics/openAccess