マサバ太平洋系群成魚の移動 : -1950〜1968年の標識放流結果からたみ移動の特性*1-

概要

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Two hundred and twenty-one tagging experiments were carried out during 1950 through 1968 on the Pacific Subpopulation of the Japanese common mackerel, Scomber japonicus. Tagged fish totaled 37, 025 of which 256 were recaptured (recapturerate being 0.69%). The highest recapture rate as related to type of tagging was reported for the Atkins type of tag fastened on to the caudal peduncle(1.35%). That for the ecological phase of the fish was for the spawning period (1.50%), and for geographical area it was for the Izu Shoto Islands region (1.37%), respectively. The recaptures after more than 100 days were observed mostly of fish tagged with the dart-type tag, thrust into the dorsum. Noteworthy exsamples were fish recovered 480 nautical miles away from the tagged place and those recaptured when the fish revisited the release site. The present observations may substantiate the hypothesis in regard to the movement and migratory patterns of adult mackerel of the Pacific Subpopulation.
公益社団法人日本水産学会の論文