Population structure and relative growth of freshwater prawn Macrobrachium amazonicum (HELLER, 1862) (Crustacea, Palaemonidae) in two regions of the State of Amapá, Amazon River mouth, Brazil.

LIMA, J. de F.; SILVA, L. M. A. da

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Campo DC	Valor	Idioma
dc.contributor.author	LIMA, J. de F.	pt_BR
dc.contributor.author	SILVA, L. M. A. da	pt_BR
dc.date.accessioned	2015-12-09T11:11:11Z	pt_BR
dc.date.available	2015-12-09T11:11:11Z	pt_BR
dc.date.created	2015-12-09	pt_BR
dc.date.issued	2015	pt_BR
dc.identifier.citation	Biota Amazônia, Macapá, v. 5, n. 2, p. 52-57, 2015.	pt_BR
dc.identifier.issn	ISSN 2179-5746	pt_BR
dc.identifier.uri	http://www.alice.cnptia.embrapa.br/alice/handle/doc/1031247	pt_BR
dc.description	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 at examining the population biology with emphasis on the sex ratio and size frequency distribution. The specimens were analyzed in terms of population structure , sexual ratio, size frequency distribution, recruitment and the relative gr owth was compared by sex and seasons. A number of 5,179 (2,977 females and 2,192 males) were collected monthly using 20 matapis. The sex ratio in both areas was favorable to females with 1:1.36 in Santana Island and 1:1.41 in Mazagão Velho. The monthly distribution of absolute frequency of juveniles , adult males and females varied according to the season in the two areas studied. Adult females were more abundant in the rainier period; while the adult males and females were similarly abundant in the less rain y period. In Santana Island, females were significantly larger than males, while the sizes were similar between sexes in Mazagão Velho. The regression equations applied to the data shown positive allometry in all relations , with r² more than 0.94 in both sex and sites.	pt_BR
dc.language.iso	eng	eng
dc.rights	openAccess	eng
dc.subject	Crustacean	pt_BR
dc.subject	Growth	pt_BR
dc.subject	Relação morfométrica	pt_BR
dc.subject	Morphometric relationship	pt_BR
dc.subject	Matapi	pt_BR
dc.title	Population structure and relative growth of freshwater prawn Macrobrachium amazonicum (HELLER, 1862) (Crustacea, Palaemonidae) in two regions of the State of Amapá, Amazon River mouth, Brazil.	pt_BR
dc.type	Artigo de periódico	pt_BR
dc.date.updated	2017-03-14T11:11:11Z	pt_BR
dc.subject.thesagro	Crustáceo	pt_BR
dc.subject.thesagro	Crescimento	pt_BR
riaa.ainfo.id	1031247	pt_BR
riaa.ainfo.lastupdate	2017-03-14	pt_BR
dc.contributor.institution	JO DE FARIAS LIMA, CPAF-AP; LUIS MAURICIO ABDON DA SILVA, IEPA, Macapá, AP.	pt_BR
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