Distribution and Abundance of the Early Life Stages of Octopus, Octopus Dofleini Wülker, 1910 in the North Pacific
Octopus dofleini is distributed widely in the subarctic waters of the North Pacific from off Hokkaido, northward through the Aleutian Islands southward to off northern California. It grows to about 3 m in total length and reaches 50 kg in weight. However, its early life stages are scarcely known. A total of 594 juvenile O. dofleini was collected at 77 out of 650 stations from 10 minute surface tows at night using a “Larva net” during the period from mid-April to mid-September, 1975–1979. Although sampling area and intensity varied by year and month, captures were limited to the period from early June to mid-August. Most of the successful tows yielded less than 10 individuals but 9 stations exceeded 20. Catches were scattered along the Aleutian Islands, north of 45°N between 167°E and 155°W in the North Pacific and south of 57°N between 180° and 165°W in the Bering Sea. Abundance was relatively high in the waters far off the Amchitka Islands in the Pacific and off Fox Island, in the Bering Sea. Juveniles collected were 3–13 mm mantle length (ML) in size and the size class of 4–5 mm ML was the dominant. These juveniles were thought to be hatched out mainly in the coastal waters along the Aleutian Islands, transported by the Alaskan Stream, and accumulated in the waters between Western Subarctic Domain and Central Subarctic Domain.
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Document Type: Research Article
Publication date: 1991-09-01
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