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Morphometrics of two sympatric species of tree frogs in Korea: a morphological key for the critically endangered Hyla suweonensis in relation to H. japonica

Animal Cells and Systems 2013년 17권 5호 p.348 ~ 356
Borzee Amael, 박소연, 김아빈, 김현태, 장이권,
소속 상세정보
 ( Borzee Amael ) - Ewha Womans University Division of Ecoscience
박소연 ( Park So-Yeon ) - Ewha Womans University Division of Ecoscience
김아빈 ( Kim Ah-Bin ) - Ewha Womans University Department of Life Sciences
김현태 ( Kim Hyun-Tae ) - Seosan High School
장이권 ( Jang Yi-Kweon ) - Ewha Womans University Division of Ecoscience

Abstract


Although DNA taxonomy is readily available, morphological keys are still valuable for quick and easy identification of species on site. In Korea, Hyla japonica is widespread throughout the country, whereas Hyla suweonensis occurs in the lowlands of western central Korea. H. suweonensis is rapidly disappearing and was consequently designated as critically endangered by the Korean government. We measured 19 characters for male individuals of the two tree frog species to develop a morphological key for identification. Our morphometric analyses indicated that the two tree frog species differed significantly in means of all morphological characters. In general, H. suweonensis was smaller and more slender than H. japonica. Moreover, the distributions of five characters related to head width and the angle between eyes and ipsilateral nostrils did not overlap in the two species and may be used for species identification. Because the character differences between the two species are small, all five characters should be used together to reliably distinguish the two tree frog species. Besides being used as a morphological key, our result in size difference leads to several research questions about microhabitat niche selection and competition between the two Korean tree frog species.

키워드

Hyla suweonensis; Hyla japonica; morphometric analysis; morphological characters; species identification

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