2011 Fiscal Year Final Research Report
Prediction of Pacific bluefin tuna spawning area changes caused by global warming related rises in sea water temperature
| Project/Area Number |
20688009
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| Research Category |
Grant-in-Aid for Young Scientists (A)
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| Allocation Type | Single-year Grants |
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| Research Field |
General fisheries
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| Research Institution | The University of Tokyo |
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Principal Investigator |
KITAGAWA Takashi 東京大学, 大学院・新領域創成科学研究科, 助教 (50431804)
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| Project Period (FY) |
2008 – 2011
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| Keywords | 水産学 / クロマグロ / 地球温暖化 / 飼育実験 / 数値実験 / 仔魚 / 海水温 / 輸送 |
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| Research Abstract |
The predicted changes in spawning areas due to global warming and the resulting rise in sea surface temperatures are investigated in this study. Rearing experiments of eggs and larvae to determine optimum temperatures, biologging measurements to compare behavioral physiology of Pacific bluefin tuna(Thunnus orientalis) to that of yellowfin tuna(T. albacares), and a simulation using an ocean model under a climate warming scenario were conducted. The results were as follows :(1) The optimum temperature for eggs and larvae were 26(2) Bluefin tuna would lack the ability to radiate excess body heat thus global warming could affect their distribution in the future.(3) The predicted survival rates of larvae arriving in Japanese coastal waters in 2100 would decline to 36% of present recruitment levels.
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[Remarks] シンポジウム東京大学大気海洋研究所共同利用研究集会「電子標識を用いた高度回遊性魚類の生態研究の現状」コンビーナー:北川貴士・木村伸吾.東京大学大気海洋研究所.平成23年12月8日-9日
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[Remarks] アウトリーチ活動情報市民講座:「熱い血潮のマグロたち」東京私立中学合同相談会, 2010年5月9日,東京国際フォーラム
