2024-03-29T06:40:06Zhttps://eprints.lib.hokudai.ac.jp/dspace-oai/requestoai:eprints.lib.hokudai.ac.jp:2115/388172022-11-17T02:08:08Zhdl_2115_20049hdl_2115_141北海道南西部沖合における春季のスケトウダラの分布Distribution of Walleye Pollock Theragra chalcogramma off Southwestern Hokkaido in the Japan Sea in Spring髙木, 省吾前田, 辰昭亀井, 佳彦中谷, 敏邦髙津, 哲也高橋, 豊美スケトウダラTheragra chalcogramma分布北海道南西部沖合索餌期初期対馬暖流前線663In order to elucidate the distribution pattern of walleye pollock Theragra chalcogramma off southwestern Hokkaido in the Japan Sea, trawling and acoustic surveys, and hydrographic observations were conducted in early April from 1989 to 1993. In 1991 and 1993, the Tsushima Warm Current Water was widely distributed in the coastal area of Aomori Prefecture, and a large number of walleye pollock were collected in the southwestern area off Hokkaido. In contrast, this water was observed only in a restricted coastal area of Aomori Prefecture in 1989 and 1990, and walleye pollock were found distributed in a coastal area 20-30 miles off Aomori Prefecture. Although an annual change in the distribution of walleye pollock was observed, they were concentrated in the area of the horizontal thermal front between the Tsushima Warm Current Water and the Japan Sea Proper Water every year. From these observations, it appears that the migration of walleye pollock in early spring is closely related to the behavior of the Tsushima Warm Current Water in the Japan Sea off Aomori Prefecture.日本水産学会Journal Articleapplication/pdfhttp://hdl.handle.net/2115/38817https://eprints.lib.hokudai.ac.jp/dspace/bitstream/2115/38817/1/takahashi1-29.pdf0021-53921349-998XAN00193422日本水産学会誌6222052121996jpninfo:doi/10.2331/suisan.62.205© 1996 公益社団法人日本水産学会publisher