著者

桑原 昭彦 鈴木 重喜

出版者

日本水産學會

雑誌

日本水産学会誌 (ISSN:00215392)

巻号頁・発行日

vol.49, no.10, pp.1499-1506, 1983

被引用文献数

1

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This paper describes the vertical and horizontal distributions, and feeding habits of a sole <i>Heteromycteris japonicus</i> (TEMMINCK et SCHLEGEL) larvae, collected in the western Wakasa Bay, Japan Sea, from June to September 1981.<br> The larvae <i>H. japonicus</i> distributed mainly in the waters between 25m and 50m depth. Small size larvae of less than 3.0mm BL commonly appeared at Sts. A, B and C, and large size larvae of more than 4.0mm BL abundantly at St. A. It is suggested that the larvae shift the habitual area from &ldquo;offshore-coastal area&rdquo; to &ldquo;coastal area&rdquo; as growth of the larvae proceeded.<br> The larvae of less than 4.0mm BL fed mostly on <i>Microsetella norvegica</i> and copepod nauplii. Most of the same size larvae caught at St. A ate <i>M. norvegica</i>, but at St. C. larvae fed on <i>M. norvegica</i> and copepod nauplii. Percentage of larvae carrying food in their alimentary canal was high in those collected at St. A and low at St. C. The larvae of more than 5.0mm BL consumed mainly <i>Penilia avirostris, Podon</i> sp. and <i>M. norvegica.</i><br> According to these findings on feeding habits of the larvae of <i>H. japonicus</i> it is estimated that the offshore area is umsatisfactory for survival of the larvae, compared with the coastal area.

著者

山崎 淳 桑原 昭彦

出版者

公益社団法人 日本水産学会

雑誌

日本水産学会誌 (ISSN:00215392)

巻号頁・発行日

vol.59, no.12, pp.1977-1983, 1993-12-25 (Released:2008-02-29)

参考文献数

17

被引用文献数

5 5

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Eight experimental fishings with crab traps were made to study the spatial distribution pattern of snow crab Chionoecetes opilio on the bottom of a bank known as the Yamato-tai located in the center of the Japan Sea. The size of the terminal molt crab was comparatively examined for three regions, i. e. Yamato-tai in the Japan Sea, coastal waters of the Japan Sea off Kyoto Prefecture, and coastal waters of the Pacific Ocean off Fukushima Prefecture.Adult females were mainly distributed in an area shallower than around 320m in depth in conditions of a gradual down ward slope with a muddy bottom. On the other hand, males were distributed in all survey areas from 290m to 349m in depth.Terminal molt males were divided into five groups with average carapace sizes of 64.9mm, 80.5mm, 96.4mm, 110.5mm, and 125.0mm. Adult female sizes of terminal molt females was 69.8mm. These sizes were 10-20mm smaller than the terminal molt size of crabs obtained from the coastal areas off Kyoto and Fukushima Prefectures.