著者

Muraji Masahiko Tachikawa Shuji

出版者

Entomological Society of Japan

雑誌

Entomological science (ISSN:13438786)

巻号頁・発行日

vol.5, no.2, pp.249-258, 2002-06-25

参考文献数

17

被引用文献数

1

---

To examine the species integrity of a water strider, Gerris gracilicornis, multivariate analyses based on 32 morphometric characters were performed on 158 male adults collected from 47 populations in the Russian Far East, Korea, Taiwan, and Japan, as well as on 66 individuals of three other Gerris (Macrogerris) species (G. yezoensis, G. insularis, and Gerris sp.). In canonical discriminant analyses, all of these species were distinguished unambiguously. When multivariate analyses were applied to G. gracilicornis individuals, both principal component and canonical discriminant analyses indicated that there are three morphologically and geographically separated population groups (Groups A, B, and C). Group A is distributed in the Korean Peninsula and the Japanese Islands from Hokkaido Island to Yaku-shima Island, Group B in the Ryukyu Islands from Amami-oshima Island to Yonaguni-jima Island, and Group C in the Russian Far East, Cheju Island of Korea, and Taiwan. Canonical discriminant analysis of laboratory-grown insects suggested that the morphometric differences among these groups were not due to environmental or climatic differences, but to genetic differences among the different groups.