@article{oai:oacis.repo.nii.ac.jp:00002007, author = {Fujikawa, Shunsuke and Hamasaki, Katsuyuki and Dan, Shigeki and Kitada, Shuichi}, journal = {Biogeography : international journal of biogeography, phylogeny, taxonomy, ecology, biodiversity, evolution, and conservation biology}, month = {Sep}, note = {Coenobita rugosus is distributed along the entire coast, and the distribution of C. violascens is restricted to the vicinity of rivers, mainly in the mangrove estuaries on southern Japanese islands. To infer the environmental cues affecting successful emigration from the sea to land on these species, we examined shellwearing and landing behaviour, moulting and survival for laboratory-raised megalopae and early juveniles under different seawater conditions: 1) high salinity (34 ppt, control), 2) low salinity (24 ppt), and 3) high salinity (34 ppt) with riverine odours (mangrove riverine water). In C. violascens, reduced salinity and riverine odours stimulated shell-wearing activity, and riverine odours enhanced the landing activity. In C. rugosus, reduced salinity and riverine odours stimulated both shell-wearing and landing activities, and the magnitude of the effects was larger in response to reduced salinity than riverine odours. These seawater conditions also tended to enhance the moulting and survival of the animals. Salinity reductions widely occur along the shoreline due to the inflow of groundwater as well as river water. Riverine odours and reduced salinity should be cues for emigration from the sea to land by megalopae of C. violascens and C. rugosus, respectively, thereby characterizing the distributions of these species on the islands.}, pages = {111--121}, title = {Emigration behaviour, moulting and survival during the sea-to-land transition of land hermit crabs Coenobita violascens and Coenobita rugosus under laboratory conditions: Effects of salinity and riverine odours}, volume = {20}, year = {2018} }