Abstract
Distribution of the crabs were investigated at the land and brackishwater area of the Sagamigawa river, Kanagawa Prefecture, central Japan from November 2006 to August 2011. Living crabs, carcasses, exuviae and their nests were confirmed at 109 localities all over the study area. The number of the species of the crabs came up to 17, which were Portunus pelagicus, Portunidae sp., Deiratonotus cristatum, Scopimera globasa, Pachygrapsus crassipes, Ptychognathus ishii, Eriocheir japonica, Hemigrapsus sanguineus, Hemigrapsus penicillatus, Gaetice depressus, Chiromantes haematocheir, Chiromantes dehaani, Parasesarma pictum, Sesarma bidens, Chasmagnathus convexus, Helice tridens and Plagusia dentipes. They are noteworthly that living individuals of Ptychognathus ishii was recorded for the first time at Kanagawa Prefecture and living individuals and their nests of Scopimera globasa was recorded for the first time in ten and several years in this area.
