Diving patterns and performance of Pacific bluefin tuna (Thunnus thynnus orientalis) as recorded by archival tags
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概要
- 論文の詳細を見る
Archival tagged immature Pacific bluefin tuna were released off Tsushima Island in the East China Sea. Time-series data on swimming depth, ambient temperature, internal body temperature, and light intensity were recorded every 128s to evaluate : 1) their vertical swimming patterns to depths below the thermocline and 2) the development of their diving performance with growth. In summer, the tuna spent most of their time at the surface, but occasionally dove to depths below the thermocline during the daytime, and at dawn and dusk. In addition, bluefin dove at increasing descent rates and surfaced more slowly when they made excursions to deeper depths. Larger-sized bluefin dove to much deeper depths than smaller individuals, suggesting that the diving performance of bluefin is related to their body size and larger size enables them to expand their vertical movement range.
- 東京大学の論文
- 2003-03-28
著者
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Yamada Harumi
National Research Institute Of Far Seas Fisheries Fisheries Research Agency
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KITAGAWA TAKASHI
Ocean Research Institute, University of Tokyo
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KIMURA SHINGO
Ocean Research Institute, University of Tokyo
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NAKATA HIDEAKI
Faculty of Fisheries, Nagasaki University
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Kimura Shingo
Univ. Tokyo Tokyo
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Nakata Hideaki
Nagasaki Univ. Nagasaki Jpn
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Nakata Hideaki
Faculty Of Fisheries Nagasaki University
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Kitagawa Takashi
Ocean Research Institute University Of Tokyo
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Kimura Shingo
Ocean Research Institute The University Of Tokyo
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Yamada Harumi
National Research Institute Of Far Seas Fisheries
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Kitagawa Takashi
Ocean Research Institute The University Of Tokyo
関連論文
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