Data/hora: 16/06/2024 06:22:25

Provedor de dados: | 52
País: | Brazil
Título: | Reproduction period of Mimagoniates microlepis, from an Atlantic Forest Stream in Southern Brazil
Autores: | Braga,Marcelo Rennó; Aranha,José Marcelo Rocha; Vitule,Jean Ricardo.
Data: | 2008-04-01
Ano: | 2008
Palavras-chave: | Coastal stream; Blue tetra; East basin.
Resumo: | Mimagoniates microlepis was collected between January and December/2002. Three sample points were chosen at higher, medium and lower portions of Ribeirão river, located at the east of Paraná state. The reproduction period was observed by the frequency of gonad developmental stages, variation of the gonosomatic relation (RGS) and gonad condition (K). The average length at the first sexual maturity (L50) and the average length when 100% of individuals were adults (L100) were calculated. The intensity of the reproductive activity (IAR) was estimated at each sample point. The reproduction period started in the winter and ended at the end of spring. The high values of IAR encountered demonstrated that the reproductive activity occurred in the whole study area, mainly at the middle portion of the river. Apparently M. microlepis synchronize its fecundation and spawning with the rain regimes using the most suitable times for the cospecific encounters and offspring survival.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000200014
Editor: | Instituto de Tecnologia do Paraná - Tecpar
Relação: | 10.1590/S1516-89132008000200014
Formato: | text/html
Fonte: | Brazilian Archives of Biology and Technology  v.51 n.2 2008
Fonte: | info:eu-repo/semantics/openAccess