ABUNDANCE AND VERTICAL DISTRIBUTION OF THE CHAETOGNATH PARASAGITTA ELEGANS (VERRILL) UNDER THE SEA ICE IN SAROMA KO, A LAGOON ON HOKKAIDO, JAPAN (Ninth Symposium on Polar Biology)
スポンサーリンク
概要
- 論文の詳細を見る
Abundance, vertical distribution and maturity of the chaetognath Parasagitta elegans under the sea ice in a shallow lagoon (the depth of bottom, <20m) on Hokkaido in the daytime in February 1986, were examined. The abundance was estimated to be about 10-30 individ. m^<-3>. This is approximately half of the maximum densities previously reported in inshore open waters. Vertically, the maximum abundance was observed at a depth of 2 m beneath the undersurface of the ice. The size ranged 15.40-27.05 mm in body length, and most P. elegans were adult forms of Stage II in ovary maturity. These findings suggest that in the boreal waters P. elegans occurs commonly under the sea ice, and that the maturing adult forms appear in proximity of the ice even in the daytime.
- 国立極地研究所の論文
著者
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Watanabe Kentaro
National Institute of Polar Research, Kaga 1-chome, Itabashi-ku, Tokyo 173-8515, Japan
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TANIMURA Atsushi
National Institute of Polar Research
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Watanabe Kentaro
National Institute Of Polar Research
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Watanabe K
National Institute Of Polar Research Kaga 1-chome Itabashi-ku Tokyo 173-8515 Japan
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Watanabe K
National Institute Of Polar Research
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KOTORI Moriyuki
Hokkaido Central Fisheries Experimental Station
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NISHIYAMA Tsuneo
Institute of Marine Science, University of Alaska-Fairbanks
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Nishiyama Tsuneo
Institute Of Marine Science University Of Alaska:(present Address)institute Of Oceanic Research And
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Nishiyama Tsuneo
Department Of Marine Science And Technology Hokkaido Tokai University
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Tanimura A
Kyoto Prefectural Univ. Kyoto Jpn
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Tanimura Atsushi
National Institute of Polar Resarch
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- ACKNOWLEDGMENTS
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- Marine biological data of BIOMASS programme at Syowa Station in the 1982 winter(JARE-23)(Marine Biology 6)
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- STATION
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