Primeira ocorrência de Polybius navigator (Herbst) (Decapoda, Brachyura, Portunidae) no Atlântico ocidental

Exotic species of freshwater decapod crustaceans in the state of São Paulo, Brazil: records and possible causes of their introduction

“…Rodrı´guez and Sua´rez (2001) summarized many documented cases of anthropogenic dispersal of marine and freshwater decapod species, and discussed possible factors that could account for their dispersal. Although there are some well known cases of introduction of marine decapod species in Brazil, (Melo 1983(Melo , 1989Bueno 1989;Barreto et al 1991Barreto et al /1993Calado 1996;Carqueija and Gouveˆia 1996;Negreiros-Fransozo 1996;Tavares and Mendonc¸a 1996;Mantelatto and Dias 1999;Melo et al 2000;Severino-Rodrigues et al 2000;Mantelatto and Garcia 2001;Melo and Crivelaro 2002), information on the dispersal of freshwater shrimps and crabs due to human activities is sparse or poorly documented, with few notable exceptions such as reports of the IndoPacific shrimp, Macrobrachium rosenbergii (De Man) in the natural environment of the eastern Amazon region (Barros and Silva 1997;Valenti and New 2000) and in the state of Espı´rito Santo .…”