南北海道葛登支におけるアラレタマキビガイ (Nodilittorina exigua) の成長の季節性

概要

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Seasonal patterns in growth of shell and soft part weights were investigated for small (immature) and large (mature) individuals of the supralittoral snail, Nodilittorina exigua at Kattoshi, southern Hokkaido. Shell growth was measured monthly for marked animals. Soft part weights of the marked animals were calculated by allometric equations between shell height and dry flesh weight that derived from 50 unmarked individuals for each month. Shell growth of both small and large snails occured only in summer, and growth rate and growth period of large snails were lower and shorter than those of small snails. Soft part weight of small snails increased in summer much more than in other seasons, while that of large snails did not show marked increase in summer. These differences between small and large animals may be caused by differences in allocation of energy to growth and reproduction.
日本貝類学会の論文
1995-03-31