Use este identificador para citar ou linkar para este item: https://repositorio.ufpa.br/jspui/handle/2011/10919
Tipo: Artigo de Periódico
Data do documento: Dez-2013
Autor(es): NÓBREGA, Priscila Sousa Vilela da
SILVA, Bianca Bentes da
MARTINELLI-LEMOS, Jussara Moretto
Afiliação do(s) Autor(es): UFPA - Universidade Federal do Pará
Título: Composition of shrimp populations (Crustacea: Decapoda) in non-vegetated areas of two river islands in a Brazilian Amazon estuary
Citar como: NOBREGA, Priscila Sousa Vilela da; BENTES, Bianca; MARTINELLI-LEMOS, Jussara Moretto. Composition of shrimp populations (Crustacea: Decapoda) in non-vegetated areas of two river islands in a Brazilian Amazon estuary. Zoologia (Curitiba), Curitiba, v. 30, n. 6, p. 652-660, dez. 2013. Disponível em: http://repositorio.ufpa.br/jspui/handle/2011/10919. Acesso em:.
Abstract: This study investigates the shrimp found in non-vegetated areas of an estuary of the Amazon River. We ascertained the input of juveniles, species' biometrics and the influence of environmental factors on the abundance of species. The samples were collected monthly, from August 2006 to July 2007, in two places in the estuary, each next to an island. For collecting, we used a manual trawl to perform three hauls per month, totaling 36 samples per site. The abundance of shrimps was estimated as a function of the density of specimens per unit area. We used the Spearman's correlation to test the hypothesis that there is significant correlation between the average of the environmental variables measured and variations in shrimp density. The Kruskal-Wallis and the Mann-Whitney tests showed that there were significant differences in environment factors (temperature and salinity) among the months and sites. We obtained 6,091 shrimps, from which 5,231 (85.88%) were caught off the Arapiranga Island and 860 (14.12%) off the Mosqueiro Island, Palaemonidae and Penaeidae were the only families recorded. Five species were collected: Macrobrachium amazonicum (Heller, 1862), Macrobrachium surinamicum Holthuis, 1948, Macrobrachium carcinus (Linnaeus, 1758), Macrobrachium rosenbergii (De Man, 1879), and Farfantepenaeus subtilis (Pérez-Farfante, 1967). The latter (pink shrimp) was found for the first time in oligohaline environments (0-8). Macrobrachium amazonicum was the most abundant species. The recruitment of M. amazonicum juveniles was continuous throughout the year. The population of M. surinamicum was composed by juveniles and adults and that of F. subtilis exclusively by juveniles. The environmental factors analyzed were variable throughout the year and seem to explain the patterns of shrimp species occurrence in the region, the variation in their abundance and juvenile recruitment.
Palavras-chave: Ecologia
Palaemonidae
Penaeidae
CNPq: CNPQ::CIENCIAS BIOLOGICAS::ZOOLOGIA
Título do Periódico: Zoologia (Curitiba)
ISSN: 1984-4670
País: Brasil
Instituição: Universidade Federal do Pará
Sigla da Instituição: UFPA
Tipo de Acesso: Acesso Aberto
Fonte URI: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702013000600010&lng=pt&nrm=iso
Identificador DOI: http://dx.doi.org/10.1590/S1984-46702013005000004
Aparece nas coleções:Artigos Científicos - ICB

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