エゾアワビ稚貝の害敵生物に関する実験的研究
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概要
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Quantitative analysis on damages inflicted to young abalones Haliotis discus hannai by several different of predatory animals was examined under experimental conditions. The results are summarized as follows. 1. Large sized strf-fish, Ditrema temmincki, at body lengths of more than 20cm prey on young abalones during day time. 2. The crabs, Charybdis japonica, Cancer amphiotus, and Pugettia quadridens proved to be predatory animals of young abalones. Charybdis japonica, 8cm long in carapace width, often took to young abalones 16-37mm long in shell length. In the case of Cancer amphioetus, of about 2.5cm long in carapace width, the maximum shell length of young abalones taken was about 15mm long. In the case of Pugettia quadridens, of about 3.5cm long in carapace width, it could take young abalones having shell lengths below 10mm. These crabs commonly prey on the young abalones during night time.
- 公益社団法人 日本水産学会の論文