@article{oai:nodai.repo.nii.ac.jp:00000434,
 author = {藤本, 竜輔 and 安藤 元一 and 小川 博 and FUJIMOTO, Ryusuke and ANDO Motokazu and OGAWA Hiroshi},
 issue = {4},
 month = {2016-04-20},
 note = {野外調査の難しい種である半水生のカワネズミChimarrogale platycephalaにおける生息確認調査の効率を向上させることを目的として,捕獲個体の死亡率を低減するためのワナ改良をおこなった。同時に調査に適した季節および適切なワナ設置間隔を検討した。従来型カゴワナを24時間ごとに見回ると捕獲個体は全て死亡し,2時間毎に見回っても毛皮の水濡れが防げなかった。ホースで退避室を接続したカゴワナでは24時間毎の見回りでも64%の生存率が得られたが,ワナから脱出しようとして負傷する個体があった。さらに見回り時間を6時間毎にすると生存率は100%になり,捕獲個体の水濡れおよび負傷が防げた。本種は春～秋のどの季節にも調査が可能であり,その捕獲率は平均2.1%であった。ワナ列長1,000m以下の調査をおこなったところ,およそ470mあたり1頭の割合で捕獲された。ワナ設置間隔を100m以下に縮めても捕獲効率に差がなかったことから,ワナは100m程度の長い間隔で設置することが効率的であると考えられた。本種が捕獲された地点においては遅くとも調査4日目以内に捕獲があったことから,生息の有無を判断するためには連続4日間以上の調査が必要であることが示された。, Capture survey methods of the Japanese water shrew Chimarrogale platycephala have not been standardized and the work is laborious. To reduce mortalities of the water shrew during survey, we improved the structure of the trap. To improve the survey efficiency, we tried to identify appropriate survey seasons, places for trapping as well as distances between traps. All animals in the traps were found dead when we used conventional cage traps and inspected them at the interval of 24 hours. When we reduced inspection intervals to 2 hours, mortalities did not take place but the bodies of captured animals often got soaked. When we attached shelter chambers to the conventional traps and inspected them at 24 hour interval, survival rate was improved to 63.9%. The rate reached 100% under 6 hours inspection interval, and the animals were found in dry conditions without any injures. The survey work could be done at any time during spring and autumn. The annual capture rates averaged at 2.1%. The animals were captured at the rate of an individual per approximately 470m trap-line length. Bringing trap distances shorter than 100m was not effective in improving capture efficiencies. The first capture at each of the trapping sites took place within 4 days after starting the survey. For faunal studies of the water shrew, it is thus recommended to continue survey for at least four consecutive days, place traps at the interval of 100m, and use an improved-type cage trap that has a shelter room and food in it., E, 5, KJ00006923123, 論文, Article},
 pages = {290--296},
 title = {カワネズミChimarrogale platycephalaにおける効率的な捕獲調査方法の検討},
 volume = {55},
 year = {},
 yomi = {フジモト, リュウスケ and アンドウ, モトカズ and オガワ, ヒロシ}
}