池田湖産コアユの標識放流について-予-標識法選定の問題

概要

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Marking experiments of the small-sweet-fish were executed in the Lake Ikeda in order to findthe most effective method, and the following were comfirmed as the favourabe factors, such as 1)As the recovery rate of the tagging in Atkins method is better than that in the fin-clipping methodprovided that the experiments are carried out during the fishing season ; at least in the fishingseason (February~May), Atkins method should be adapted as the most effective one, while caresshould be paid in decling the losing rate of the tag. The tagging mortality rate and the tag-losingrate were favourable when the square-shaped vinyl plate (4mm by 4mm) were attached to thefish body at the front of the dorsal fin through the back with the small-saurel-hook. 2) In theseason excepting the fishing one, the fin-clipping method is to be regarded as the most effectiveone ; but it has the defect that it takes much time in checking and recovering the marked fish.3) It seems to be most profitable for us to make us SANDOZ : 0.6%, one of the most effectiveanesthetices prevailing now as the drug accelerating the marking process.
鹿児島大学の論文