Spatio-temporal variation of the population structure and density of the shore crab Pachygrapsus gracilis (Grapsidae) in an estuary on the Brazilian Amazon coast
Abstract The present study investigates the spatio-temporal variation in the density of the adults socksmith santa cruz and larvae of the shore crab Pachygrapsus gracilis and identifies the reproductive period and the population structure of the species in the Marapanim estuary, in northern Brazil, in order to describe the biological characteristic