ツシマジカ,マゲシカ,ヤクシカの頭蓋の計測形態学的研究

概要

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The skull ofCervus pulchellus, Cervus nippon mageshimaeandCervus nippon yakushimaewere investigated morphometrically. The results are as follows. (1) The growth of skull reached adult size at about 4 years old; the cranial length grew relatively faster than cranial width. (2) C. pulchellushad the largest skull size of the three Sika deer forms, and that ofC. n. mageshimaewas next to it. Compared the 31 cranial indices against the basal length, C. n. mageshimaehad the largest cranial width, and the narrowest width wasC. n. yakushimae. The nasal region ofC. pulchelluswas short. (3) The skull size of males was apparently larger than that of females. The under margin ofTuber facialewas W-shaped in males and U-shaped in females. (4) Based on clinal analysis (IMAIZUMI, 1970), condylobasal length ofC. n. yakushimaeand nasal length ofC. pulchellusandC. n. yakushimaewere on the clinal line ofC. nippon, and the others were in between the estimated clinal line ofC. hortulorumgroup and that ofC. nippon. (5) From the principal component analysis, the clear separation can be made among three Sika leers by the first principal component-i.e., the size vector. It was noted that the differences in skull measurement betweenC. n. mageshimaeandC. n. yakushimaewas larger than those betweenC. pulchellusandC. n. mageshimae.
日本哺乳類学会の論文