Habitat selection of the pink shrimp Farfantepenaeus paulensis and the blue crab Callinectes sapidus in an estuary in southern Brazil: influence of salinity and submerged seagrass meadows

Nauplius

Vinicius Mendes Ruas¹  Marcos Alaniz Rodrigues¹  Luiz Felipe Cestari Dumont¹  Fernando D'incao¹ 

[1] ,Federal University of Rio Grande Laboratory of Decapod Crustaceans Rio Grande RS ,Brazil

关键词: Crustaceans;    GLM;    Patos Lagoon;    submerged vegetation;   

DOI  :  10.1590/S0104-64972014000200005

来源: SciELO

【 摘 要 】

This study was conducted in two estuarine inlets (Saco da Mangueira and Saco do Arraial) at the Patos Lagoon estuary, southern Brazil. The changes in relative abundance and size of post-larvae and juvenile shrimp Farfantepenaeus paulensis and juvenile blue crab Callinectes sapidus were compared, considering the influence of salinity and the presence of submerged seagrass meadows. The analyses were performed using generalized linear models (GLM) for abundance variations and ANOVA for variations on the size of individuals. The pink shrimp was more abundant at Saco da Mangueira, in seagrass meadows and areas of higher salinity. The blue crab was more abundant at Saco do Arraial and in lower levels of salinity. The importance of submerged vegetation for the blue crab lies in a preference of smaller crabs of the species for the seagrass meadows. It has been shown that these species choose different habitats in the estuary, and both the salinity and the presence of submerged seagrass meadows influence the selection of habitat.

【 授权许可】

CC BY   
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