埼玉県立自然史博物館研究報告 第７号 (1989)
埼玉県桶川市の小哺乳類
佐々木 昌 志
日本獣医畜産大学
斎 藤 貴
埼玉県立秩父農工高等学校
高 橋 守
埼玉県立川越高等学校
摘 要
1983年から1988年まで，埼玉県桶川市における小哺乳類相の調査を行った．捕獲された小哺乳類は，アカネズミ，ハタネズミ，ジネズミ，アズマモグラの4種で，他に，カヤネズミの生息が認められた．アカネズミとアズマモグラは市内に広く分布していたが，ハタネズミは荒川や用水路沿いの荒地・草地・休耕田に認められた．ジネズミは荒川河川敷の荒地でのみ採集された．
荒川河川敷においては，種類構成の季節変化がみられ，ハタネズミは冬期には採集されなかった．また，ハタネズミの捕獲数は1986年から1988年に減少した．いっぽう，1987年にはアカネズミ捕獲数の若干の増加が認められた．これらの結果について他の調査報告から検討を行った．
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Fig. 3 Changes in the captured number (100TN) of Microtus montebelli and
Apodemus speciosus at the wasteland in the riverside Arakawa (A6).
* Captured number (100TN) = (number of specimen / trap night) X100
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Small mammal fauna of Okegawa City in Saitama Prefecture
Masashi SASAKI
Nippon Veterinary and Zootechnical College, Musashino, Tokyo, 180 Japan.
Takashi SAITO
Chichibu Agricultural and Technical Senior High School, Chichibu, Saitama Pref., 368 Japan.
and
Mamoru TAKAHASHI
Kawagoe Senior High School, Kawagoe, Saitama Pref., 350 Japan.
Abstract The survey of small mammal fauna was carried out in Okegawa City (36°0′N, 135°33′E, alt. 12 to 25m), Saitama Prefecture, from 1983 to 1988.
There were collected 4 species, Apodemus speciosus, Microtus monlebelli, Crocidura dsinemmi and Mogera wogura, and admitted the habitation of Micromys minutus by the nest. A. speciosus and M. wogura were widely distributed in Okegawa City, but M. monlebelli was admitted the wasteland, pasture and abandoned paddies along the waterway. C. dsinezumi was caught only wasteland in the riverside Arakawa.
In the riverside Arakawa, it was admitted the seasonal variation of species composition, arid M. montebelli was not captured in winter. Furthermore, the number of captured of M. montebelli decreased from 1986 to 1988, on the other hand, that of A. speciosus increased a little in 1987. These results were discussed with other reports.