| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2019: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2018: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2017: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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| Outline of Final Research Achievements |
The aim of this study was to reveal the current status of natural spawning of chum salmon returning to a river without implementation of stock enhancement program, in order to understand the local ecological characteristics of wild chum salmon populations on the Sanriku Coast, the Pacific side of the Honshu Island, Japan. The field survey through the entire season for 3 years revealed the period, number and area of escapement and the number and distribution of spawning redds for the first time. A comparison with a river with stock enhancement found that a wild population has a substantial size despite that stock enhancement program has not been operated and suggested that there is a need to re-evaluate the effect of stock enhancement program. DNA genotype-based kinship estimation among all individuals of the returning adults requires more analyses.
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