| Budget Amount *help |
¥16,900,000 (Direct Cost: ¥13,000,000、Indirect Cost: ¥3,900,000)
Fiscal Year 2019: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2018: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2017: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2016: ¥7,280,000 (Direct Cost: ¥5,600,000、Indirect Cost: ¥1,680,000)
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| Outline of Final Research Achievements |
Using biologging technology, we gained new insights into how the behavior and physiology of large pelagic fishes are affected by the ambient water temperature and their body temperature. White sharks exhibited both an advantage (i.e., elevated locomotor performance) and disadvantage (i.e., elevated energy expenditure) associated with their endothermic physiology. Blue sharks, an ectothermic species, had high thermal inertia due to their large body mass and maintained their body temperature within a narrow range during diving, where the ambient water temperature changed widely. We also found that, in many large pelagic fishes, the rate of change in body temperature is faster during the warming process than cooling process. This finding suggests that their body temperature is not solely determined by the ambient water temperature but is controlled physiologically to some extent.
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