翼手類の飛翔適応に関する翼の機能形態学的研究 : I. 前肢の相対成長, 翼構成骨の骨成長, 翼荷重および翼の縦横比

概要

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Applying the allometory formula y=bx^α, the relative growth in forelimb (clavicle, scapula, humerus and radius) of a bat, Rhinolophus cornutus cornutus against skull length was investigated from birth to near adult size. It was found that the relative growth coefficient in the forelimb of the bat showed the largest value in the most distal bone and decreased towards the proximal bones. Moreover, this trend was also found in the prenatal period of its life. This trend has also been found in only the prenatal period in lambs (Wallace, 1948). Considering the above fact, it can safely be concluded that the relative growth rate in the forelimb of the bat continues from this prenatal trend until it reaches near adult size. In addition, it was found that the degree of ossification of the wing bones in Miniopterus schreibersi fuliginosus in the flying stage was in a more completed state than that in R. c. cornutus. Moreover, this difference in ossification was observed from the newborn stage. It seems likely that this more advanced ossification of the wing bones of M. s. fuliginosus, present from the newborn stage, represents an adaptation to larger wing loading at their flying stage.
社団法人日本動物学会の論文
1975-09-25