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Mathematical model and simulation of the genetic effects on a wild popueation by fish propagation

鱼类繁殖对野生种群遗传影响的数学模型和模拟

基本信息

批准号：
03660188
负责人：
WATANABE Seiichi
金额：
$ 1.41万
依托单位：
Tokyo University of Fisheries
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1991
资助国家：
日本
起止时间：
1991 至 1993
项目状态：
已结题

项目摘要

The fish propagation program that produces fish for release into natural bodies of water is now continually increasing. This program will produce various influences on a natural population. The stocking (releasing the hatchery fish into a natural population) will change the genetic composition ot the population.The genetic difference may be exist between the hatchery population and the wild population. The stocking makes the genetic composition of the wild population to the hatchery ones through the gene flow. Finally, the stocking will affect the life history strategy of the species it concerned. The stocked individuals are added to the wild population at some developing stage of the wild individuals. Accordingly, the wild individuals must change its life history schedule to adjust the optimal strategy.The careful stocking must be practiced under the critical observation of the ecological phenomena which produced by the stocking.

生产鱼以释放到自然水体中的鱼类繁殖计划现在不断增加。这一计划将对自然种群产生各种影响。放养（将孵化鱼放归自然种群）会改变种群的遗传组成，孵化种群与野生种群可能存在遗传差异。放养通过基因流使野生种群的遗传组成向孵化种群的遗传组成转化。最后，放养会影响到所关注物种的生活史对策。放养的个体在野生个体的某个发育阶段被添加到野生种群中。相应地，野生个体必须改变其生活史进程来调整最优策略，谨慎放养必须在对放养所产生的生态现象进行批判性观察的基础上进行。