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在养的鱼中,卵子大小的快速演变
Daniel D Heath1, John W Heath, Colleen A Bryden
1Great Lakes Institute for Environmental Research and Department of Biological Sciences, University of Windsor, 401 Sunset Avenue, Windsor, Ontario N9B 3P4, Canada. dheath@uwindsor.ca
Science (New York, N.Y.)
|March 15, 2003
概括
囚禁育种计划可以无意中选择鱼的较小蛋大小,这可能会降低保护工作的成功率. 在化场养殖的鱼类中,这种快速的进化在野生环境中可能无法适应.
科学领域:
- 进化生物学是进化的生物学.
- 保护遗传学 保护遗传学
- 水产养殖科学 水产养殖科学
背景情况:
- 囚禁繁殖和释放计划旨在通过减少青少年死亡率来促进人口减少.
- 良性囚禁环境可能无意中选择在自然环境中适应不良的特征.
研究的目的:
- 为了研究化场养殖如何影响蛋大小演变的鱼.
- 评估自然选择和生育选择对生命史特征的影响.
主要方法:
- 在化场和自然种群中对鱼蛋大小进行比较分析.
- 检查与化场补充的强度相关的蛋大小趋势.
主要成果:
- 在奇诺克鱼的化场养放松了对大蛋的选择,导致较小蛋大小的快速进化.
- 化场补充量高的种群表现出较小蛋的趋势,与补充量最小的种群不同.
结论:
- 囚禁中的无意选择可以推动关键生命历史特征的快速,潜在的有害变化.
- 这些进化转变可能会损害保护和重新引入计划的有效性.
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