Data/hora: 10/06/2024 18:53:42

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