Data/hora: 08/06/2024 19:06:56

Provedor de dados: 	104	
País: 	Brazil	
Título: 	Diel changes in embryonic maturation in two species of marine cladocerans in Guanabara Bay, Rio de Janeiro, Brazil	
Autores: 	Marazzo,Andrea; Valentin,Jean L.	
Data: 	2001-07-01	
Ano: 	2001	
Palavras-chave: 	Cladocera; Penilia avirostris; Evadne tergestina; Zooplankton; Embryos; Guanabara Bay; Brazil.	
Resumo: 	Two species of marine cladocerans, Penilia avirostris Dana, 1852 and Evadne tergestina Claus, 1877 were collected in thirteen samples at a fixed station in Guanabara Bay, Rio de Janeiro (30-meter depth) by means of vertical tows with a 200 µm mesh size net at different times from September 12th to 15th, 1995. The parthenogenetic females of Evadne tergestina bore mature embryos (with pigmented eye) only in the samples collected at night, whereas Penilia avirostris at any time of day. This phenomenon was interpreted based on the greater visibility of the Evadne tergestina brood: one of the benefits for embryo maturing during the darkness period would be a decrease of predation on gravid females.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752001000500033	
Editor: 	Sociedade Brasileira de Zoologia	
Relação: 	10.1590/S0101-81752001000500033	
Formato: 	text/html	
Fonte: 	Revista Brasileira de Zoologia  v.18 suppl.1 2001	
Fonte: 	info:eu-repo/semantics/openAccess