Título:	Reproductive aspects of Macrobrachium amazonicum (Decapoda: Palaemonidae) in the State of Amapá, Amazon River mouth.
Autoria:	LIMA, J. de F. SILVA, L. M. A. da SILVA, T. C. da GARCIA, J. da S. PEREIRA, I. da S. AMARAL, K. D. S.
Afiliação:	JO DE FARIAS LIMA, CPAF-AP LUIS MAURICIO ABDON DA SILVA, INSTITUTO DE PESQUISAS CIENTIFICAS E TECNOLÓGICAS DO ESTADO DO AMAPÁ THIBÉRIO CARVALHO DA SILVA, UNIVERSIDADE DO OESTE DO PARANÁ JAMILE DA SILVA GARCIA, UNIVERSIDADE DO ESTADO DO AMAPÁ ILANA DA SILVA PEREIRA, UNIVERSIDADE DO ESTADO DO AMAPÁ KARLIA DALLA SANTA AMARAL, CPAF-AP.
Ano de publicação:	2014
Referência:	Acta Amazonica, Manaus, v. 44, n. 2, p. 245-254, June 2014.
Conteúdo:	Macrobrachium amazonicum is an indigenous prawn vastly distributed in basins of South America, widely exploited by artisanal fisheries in northern and northeastern Brazil and, with great potential for aquaculture. This study aimed to investigate general aspects of population structure and reproductive characteristics (size at first maturity, fecundity and reproductive output) of M. amazonicum from two important areas to artisanal prawn fishing located at the mouth of the Amazon River, State of Amapá. The specimens were captured using 20 handcrafted traps called ?matapi?. A number of 5,179 prawns were captured, 2,975 females and 2,195 males resulting in 1.35:1 female to male ratio. Santana Island and Mazagão Velho showed females predominated in the population. A reproductive peak period was observed from January to April/2009 and in December/2010, coinciding with the period of higher rainfall. The recruitment peak occurred in June and July/2009. Egg-bearing females ranged in size (carapace length) from 11.10 to 29.6 mm. Fecundity increased with female size and reached up to 7,417 eggs. This amount of eggs is considered low if compared with other Macrobrachium estuarine species. Mean egg volume increased gradually from 0.121 to 0.24 mm3 during embryogenesis, representing 68.5% of overall increase from Stage I to Stage III. Eggs of M. amazonicum are small; this is typical for Macrobrachium species, which depends on brackish water to complete the larval development. Irrespective of female size, reproductive output of M. amazonicum varied between 4.8 and 21.85% of their body weight into eggs production.
Thesagro:	Reprodução
NAL Thesaurus:	fecundity reproduction
Palavras-chave:	Palaemonid eggs First maturation Morphometric relationship Ovos Palaemonid Primeira maturação Fecundidade Relação morfométrica
Tipo do material:	Artigo de periódico
Acesso:	openAccess
Aparece nas coleções:	Artigo em periódico indexado (CPAF-AP)