Population biology and size at the onset of sexual maturity of the amphidromous prawn Macrobrachium olfersii (Decapoda, Palaemonidae) in an urban river in southeastern Brazil

Autor(es)

Pescinelli, Regis Augusto ; Carosia, Mariana Fronja ; Farinelli Pantaleao, Joao Alberto ; Simoes, Sabrina Morilhas ; Costa, Rogerio Caetano

• Tipo de documento: Artigo Científico
• Fonte: INVERTEBRATE REPRODUCTION & DEVELOPMENT; v. 60, n. 4, p. 254-262, DEC 2016.
• Citações Web of Science: 2

Resumo

Information on population biology is essential for a better understanding of the ecological stability of a species and the ecosystem in which it lives, especially in areas affected by anthropogenic activities. This study investigated the population biology of Macrobrachium olfersii in an ecosystem under human impact, focusing on sex ratio, reproductive period, and juvenile recruitment. The onset of sexual maturity was also estimated. Samplings were performed monthly in the daytime from June 2006 to May 2007 on the Taquaral River in the city of Ubatuba, SAo Paulo State, Brazil. The sex ratio was skewed towards females, and both the reproductive period and the juvenile recruitment were continuous. The estimated size at which the species reached sexual maturity corroborated studies on populations from other locations. Results from the current study strongly indicate that the ecosystem studied may have suffered environmental stress, which probably interfered with the migration and establishment of the species: during the study, the species was found in significant abundance, but six years later, it was not captured in samplings. (AU)

• Processo FAPESP: 09/54672-4 - Biologia reprodutiva e dinâmica populacional dos camarões Penaeoidea (Crustacea, Decapoda) em duas regiões do sudeste brasileiro: efeito latitudinal e proposta para o período de defeso
• Beneficiário: Rogério Caetano da Costa
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 10/50188-8 - Crustáceos decápodes: multidisciplinaridade na caracterização da biodiversidade marinha do estado de São Paulo (taxonomia, espermiotaxonomia, biologia molecular e dinâmica populacional) (Biodiversidade Marinha)
• Beneficiário: Fernando Luis Medina Mantelatto
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOTA - Temático
• Processo FAPESP: 07/50804-8 - Reproducao e recrutamento do camarao macrobrachium olfersi (wiegmann, 1836) (decapoda, caridea, palaemonidae) na regiao de ubatuba, sao paulo.
• Beneficiário: Mariana Fronja Carosia
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica
• Processo FAPESP: 04/07309-8 - Contribuição para o período de defeso do camarão do estado de São Paulo: distribuição espaço-temporal das pós-larvas e juvenis dos camarões rosa (Farfantepenaeus spp.), branco (Litopenaeus schmitti) e sete-barbas (Xiphopenaeus kroyeri) na região de Ubatuba, SP
• Beneficiário: Rogério Caetano da Costa
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores