ニュ-ジ-ランド周辺海域におけるホキの分布と回遊〔英文〕

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The deep-water fishing grounds around New Zealand are divided into EAST, NORTHEWEST and SOUTH regions. Seasonal change of distribution, relationship between depth and length distribution, diel vertical migration are discussed in this paper. In the EAST region, the fish move from Chatham Rise and Chatham Island to Canterbury Bight from spring through autumn, and move to spawn in the areas between Mernoo Bank and Chatham Rise in winter. In the NORTHWEST region, the fish feed around North Island from spring and Chatham Rise in winter. In the spawn in the western coast of South Island in winter. In the SOUTH region, the fish feed in areas between Auckland Island and Campbell Island in spring and summer, migrate to the continental slope in autumn, and spawn around Stewart Island and Puysegur Bank in winter. Fish of various sizes live in the shallow areas of the continental slope, but in the deeper places, only the large ones can be found. Fish spend the day at depths near the bottom of the continental slope and migrate to upper layers during the night. This is considered to be a kind of feeding migration connected with the diel vertical migration of the Myctophids.
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