@article{oai:oacis.repo.nii.ac.jp:00002001,
 author = {藤川, 俊介 and 濱崎, 活幸 and 三田, 哲也 and 石山, 尚樹 and 水流, 拓馬 and 團, 重樹 and 北田, 修一},
 journal = {日本生物地理学会会報, Bulletin of the Biogeographical Society of Japan},
 month = {Jan},
 note = {The present study investigated the distributions of terrestrial hermit crabs along the coasts of Ishigakijima Island and Iriomotejima Island, Ryukyu Archipelago, Japan. Crabs were collected through visual surveys during daytime and nighttime from late June to early July during 2011 and 2012 at 18 localities on Ishigakijima Island, as well as through visual surveys during daytime and nighttime and using bait traps overnight in early July 2014 at 10 localities on Iriomotejima Island. Additionally, to confirm the temporal distributions of the crabs, nighttime visual surveys were conducted in late August and early October 2012 at 2 localities on Ishigakijima Island. Crabs were identified to the species level, and their body sizes were measured. On both islands, the coconut crab Birgus latro and five species belonging to the genus Coenobita, i.e., C. brevimanus, C. cavipes, C. purpureus, C. rugosus, and C. violascens, were recorded. Coconut crabs were captured on and/or near the limestone shores. Coenobita species excluding C. violascens were collected from the several localities that cover the entire coasts of the islands; in particular, C. rugosus, which was the dominant species, composed approximately 80% of the total number of collected individual crabs at almost all the localities on the islands. The distribution of C. violascens was restricted to the vicinity of the river, and these crabs mainly inhabited the mangrove estuaries. Our results highlight the importance of protecting mangrove estuaries to conserve the C. violascens populations.
石垣島と西表島沿岸域でオカヤドカリ類の分布状況を調査した．2011 年と2012 年の6 月末～ 7 月初
めに石垣島沿岸の18 ヵ所で昼夜の目視により，また2014 年7 月初めに西表島の10 ヵ所で昼夜の目視
と夕刻から翌朝にかけてのトラップによりオカヤドカリ類を捕獲し，種を判別して体サイズを測定し
た．また，石垣島の2 ヵ所では，2012 年の8 月末と10 月初めにも夜間の目視調査を実施した．両島とも，ヤシガニとオカヤドカリ属5 種（オオナキオカヤドカリ，オカヤドカリ，ムラサキオカヤドカリ，ナキオカヤドカリ，コムラサキオカヤドカリ）の分布が確認された．ヤシガニは琉球石灰岩の岩礁，あるいはその近辺で捕獲された．コムラサキオカヤドカリを除き，オカヤドカリ属4 種は島の周囲全域をカバーするように複数の地点で捕獲され，特にナキオカヤドカリは総捕獲個体数に占める割合が80% 前後で優占し，島の全域で出現した．コムラサキオカヤドカリは特異的な分布を示し，河口域とその近辺，特にマングローブ河口域に多く生息していたことから，その個体群の生息域内保全にはマングローブ域の保護がきわめて重要である．},
 pages = {25--38},
 title = {石垣島と西表島沿岸域におけるオカヤドカリ類の分布特性},
 volume = {71},
 year = {2017}
}