Population structure and fecundity of Upogebia omissa (Decapoda: Gebiidea: Upogebiidae) in an estuarine region in Sergipe, northeastern Brazil

Rafael de Carvalho Santos, Luiz Filipe Santos Silva, Bruna dos Santos, Juliana Menezes Motta, Douglas Fernandes Rodrigues Alves

Resumo


Camarões de lama da família Upogebiidae são organismos importantes de comunidades de substrato não consolidado, onde eles cavam tocas agindo como engenheiros ecossistêmicos. O presente estudo descreve alguns parâmetros da estrutura populacional e biologia reprodutiva do camarão de lama Upogebia omissa. A coleta dos indivíduos foi realizada no estuário do rio Vaza-Barris, estado de Sergipe, nordeste do Brasil. Em laboratório, os espécimes foram sexados e mensurados quanto ao comprimento da carapaça (CL). Fêmeas ovígeras tiveram o total de ovos contados. O tamanho do corpo variou entre 3,0 e 12,9 mm CL, sendo os machos significativamente menores que as fêmeas. A razão sexual média foi de 0,34, voltado para as fêmeas (teste binomial, P = 0,001). A fecundidade variou de 240 a 2339 ovos por fêmea, e foi significativamente afetada pelo tamanho do corpo. Dimorfismo sexual evidenciado pelo tamanho médio de cada sexo é um padrão comum em decápodes que incubam ovos, e nesse caso, a fecundidade normalmente varia em função do tamanho do corpo. Por fim, sugerimos que estudos adicionais são necessários, devido à importância ecológica desses camarões de lama e da escassez de estudos sobre eles.

Palavras chave: Fecundidade, dimorfismo sexual, camarão de lama, estuário.


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DOI: http://dx.doi.org/10.29215/pecen.v2i2.1064

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Unidade Acadêmica de Ciências Exatas e da Natureza - CFP - UFCG
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