open access

https://hdl.handle.net/2115/65080

DNA親子鑑定法を用いた種苗放流魚の自然繁殖力に関する保全遺伝学的考察

(The 10th International Symposium on Genetics in Aquaculture : 特集 Roles of aquaculture genetics in addressing global food crisis)

日本語

2009-10

水産育種研究会

水産育種

39(1)

31-35

Abstract:In June 2009. I gave a talk about our recent studies on the Hood River steelhead trout at the ISGA X (the 10th International Symposium on Genetics in Aquaculture) in Bangkok. Thailand. In this project. I and group members of Blouin lab in Oregon State University conducted genetic evaluations of reproductive success in hatchery-born fish in the wild. This article is a review summary of my presentation. We used a DNA-based parentage assignment method. in which 8 highly polymorphic microsatellite makers were genotyped in order to reconstruct the pedigree of entire populations and estimate individual reproductive success (number of adult offspring returned to the river). We found (1) number of generations in which hatchery fish spent in captivity has a strong negative impact on their natural reproductive success. and that (2) there is a carry-over effect of captive breeding that reduces the reproductive success of wild-born fish. which had captive-reared parents spawned in the wild. These findings strongly suggest a possible negative effect of hatchery stocking on the conservation of the wild population. In addition. I demonstrate that modern molecular tools and methods can provide much more insights into fish genetics and breeding science than ever obtained or expected.

学術雑誌論文

Version of Record

1343-7917

AN00012302