魚類学雑誌
Online ISSN : 1884-7374
Print ISSN : 0021-5090
カワバタモロコHemigrammocypris rasborellaにおける外部形態の水域間変異
赤田 仁典淀 太我
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2006 年 53 巻 2 号 p. 175-179

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Between-habitat variations in the body shape of Hemigrammocypris rasborella, a small freshwater cyprinid fish included in the Red List by the Ministry of Environment of Japan (Category EN), were analyzed using photographs of anesthetized specimens (n=323) collected from eight ponds on the Ise (Mie Prefecture) and Nobi Plains (Aichi and Gifu prefectures). Twenty-two morphometric variables were measured, and principal component and discriminant analyses conducted. The results indicated that body shape was variable among the ponds but similar within each plain. It is suggested that the original Ise and Nobi Plain populations differed in body shape, the subsequent restriction to isolated populations on each plain further enhancing the original morphological variations.

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