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20 January 2020 Geographic Skull Variation of the Japanese Weasel, Mustela itatsi in Islands Adjacent to Southern Kyushu
Satoshi Suzuki, Mitsuharu Matsumoto
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Abstract

Skull morphology of Mustela itatsi from two islands adjacent to Kyushu, Kamikoshikijima and Yakushima Isls., Kagoshima Prefecture were compared with populations from mainland Japan. Although size and shape variation of these island populations were within whole species range of variation, the size variation was less than that of some mainland populations. In contrast, canonical variate analysis showed a separation of the Yakushima population from other populations compared. Between these islands, skull shape was different, indicating that ecological difference such as prey size and abundance may exist. Island populations of M. itatsi could have been differentiated from mainland populations depending on different ecological conditions and geological history of each island.

© The Mammal Society of Japan
Satoshi Suzuki and Mitsuharu Matsumoto "Geographic Skull Variation of the Japanese Weasel, Mustela itatsi in Islands Adjacent to Southern Kyushu," Mammal Study 45(1), 27-39, (20 January 2020). https://doi.org/10.3106/ms2019-0023
Received: 14 March 2019; Accepted: 30 September 2019; Published: 20 January 2020
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KEYWORDS
Carnivora
island rule
Kamikoshikijima Isl
Mustelidae
Yakushima Isl
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