| Budget Amount *help |
¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2014: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2013: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
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| Outline of Final Research Achievements |
The life histories and behavior of zebrafish have been altered after five generations of size-selective harvesting. In eight among 371 SNPs markers, significant differences in allele frequencies between the selection lines were detected. These SNPs occurred in or close to a gene or in a regulatory region of a gene that has a known function, such as serotonin synthesis, ion transport, and regulation of transcription. Numerical simulations showed that the evolved life histories are adaptive to high fishing pressures. Sequence analysis of two candidate genes in two largemouth populations which are known to differ in vulnerability to fishing showed that significant divergence has occurred between the two populations. A RAD sequencing analysis suggested several genomic regions which might differ between the two populations.
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