著者

中尾 史郎 姫野 平 松本 勝正 養父 志乃夫 中島 敦司 山田 宏之

出版者

Japan Society of Civil Engineers

雑誌

環境工学研究論文集 (ISSN:13415115)

巻号頁・発行日

vol.37, pp.161-171, 2000-11-13 (Released:2011-06-27)

参考文献数

25

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Dispersal tendency of the adults of the water strider, Metrocoris histro, was clarified along a stream by the mark-recapture method, over a two-month's period Phenetic differences among members of 6 local populations from 6 streams within 3 rivers was estimated using the apterous males by multivariate morphometrics. Although the adult water striders generally seemed to be sedentary within a pool, the migrants showed a downstream bias in dispersal distance and in numbers of insects moving. Discrimination analysis showed that 67%-100% of the local group members were correctly classified into the original groups, and misclassification only occured among members sampled within a radius of 8-km. Thus the present result indicated that morphological similarity among members sampled from neighbor streams was higher than that among members sampled from the distant streams in a same river. Based on these results, patterns of dispersal and phenetic differentation of M. histro were discussed.