Genetic drift in
a hatchery and the maintenance of genetic diversity in hatchery-wild systems
M. Yokota, Y. Harada, M. Iizuka-2003
Fisheries
Science, 69(1):
101
Abstract:
Loss of within-population genetic
diversity by genetic drift is related to stocking. In order to reduce it,
selective use of wild-born individuals for hatchery broodstock is proposed.
Its effectiveness is evaluated by the analytical method and numerical
simulation. Results indicated that it is effective, especially when the
ratio of released hatchery-produced individuals is high in the natural
population. Loss of within-population genetic diversity by a few other
strategies of broodstock preparation is also analyzed by numerical
simulation and the effectiveness of these is also discussed.
(Department of Aquatic Biosciences, Tokyo University
of Fisheries, Minato, Tokyo 108-8477, Japan, Tel: 81-3-5463-0578. Fax: 81-3-5463-0578. Email: yokota@tokyo-u-fish.ac.jp)