2022 Volume 62 Issue 2 Pages 215-223
We examined morphological variations of the Herpestes auropunctatus population introduced to Okinawa Island from India approximately 100 years ago, and from there to Amami-Oshima Island and Kagoshima City approximately 30 years ago. The sexual dimorphism of H. auropunctatus was pronounced in the three populations. The average total length and head-body length in both sexes were smaller in Kagoshima than in Okinawa or Amami-Oshima. It was found that those from higher latitudes exhibited larger body mass. The plump body shape in Kagoshima may be an adaptation to the temperate climate. Larger skull size and bizygomatic width were observed in Kagoshima. These traits may reflect more frequent predation on flesh items, particularly in winter. Foot length was also larger in Kagoshima. This may help the animals dig more effectively and find insect larvae in the soil. Tail and hind foot lengths were lower in Amami-Oshima. These traits appeared to be adaptions to rugged mountains.
