真珠養殖の貝掃除に関する研究-II. : 付着生物がアコヤガイの貝殻形成と足糸分泌におよぼす影響
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概要
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In a preceding paper, it was reported that the activity of shell movement and the amount of feces in the Japanese pearl oysters, Pteria (Pinctada) martensii (DUNKER) were lowered by the presence of fouling organisms. This study has been carried out on the harmful influence of fouling organisms upon the regeneration of shell margin and the byssus secretion of the bivalve with a view to making clear whether shell cleaning is effective for increasing the growth of the bivalve and the quality of pearls. The results obtained are summarized as follows : 1. The activity of pearl oysters which regenerate the eliminated part of the shell margin notably increases just after the cleaning work of the shell, and afterwards it gradually falls with an increase of fouling organisms. Such a recovery as found above on the activity of shell growth changes by the degree of the ill-effect of fouling organisms in fouled pearl oysters. 2. The secretion activity of byssus in fouled pearl oysters changes by cleaning the shell ; the number of byssus secreted during 24 hours in the cleaned pearl oysters was doubled for about 5 days after shell cleaning. It seems that the activity of byssus secretion, in this case, was relatively slow in recovery. 3. The results mentioned above together with the outcome of the preceding paper suggests that the activity of the pearl oysters is harmfully influenced by the presence of fouling organisms, and the work of shell cleaning is effective for the production of pearls.
- 日本生態学会の論文
- 1967-12-25
著者
関連論文
- 真珠養殖の貝掃除に関する研究-I : 付着生物がアコヤガイの貝殻開閉活動と糞量におよぼす影響
- 真珠養殖の貝掃除に関する研究 IV : 付着生物がアコヤガイの杆晶体重量, 閉殼筋重量および軟体部重量におよぼす影響
- 真珠養殖の貝掃除に関する研究-III. : 付着生物がアコヤガイの酸素消費量におよぼす影響
- 真珠養殖の貝掃除に関する研究-II. : 付着生物がアコヤガイの貝殻形成と足糸分泌におよぼす影響