9 research outputs found
Bottom sediments of Area M-2
Samples of the bottom sediments in upper Galveston and Trinity Bays were obtained by various means including by hand, plastic tube, Eckman dredge, etc. and the distribution of the various bottom types were plotted throughout the area. Information and data were gathered from numerous sources and publications
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
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