Inbreeding depression affects fertilization success and survival but not breeding coloration in threespine sticklebacks
Inbreeding depression affects fertilization success and survival but not breeding coloration in threespine sticklebacks
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DOI：
10.1163/156853908792451458
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发表时间：
2008-04-01
期刊：
影响因子：
1.3
通讯作者：
Bakker, Theo C. M.
中科院分区：
文献类型：
--
作者：
Frommen, Joachim G.;Luz, Corinna;Bakker, Theo C. M.
近交衰退是一种在许多动物和植物物种中得到充分研究的现象。在鱼类方面，大多数研究集中在具有商业价值的物种。棘鱼通常从一个小的创始人种群开始殖民新的栖息地，因此，近亲繁殖的风险很高。然而，关于棘鱼生活史性状如受精成功或孵化和存活率的近交衰退程度却知之甚少。此外，人们普遍缺乏关于近亲繁殖对性选择特征（如雄性的繁殖色）的影响的知识。在我们的研究中，一个世代的近亲繁殖的兄弟姐妹交配的野生捕捞，溯河产卵刺鱼显着降低受精和孵化成功的鸡蛋。第二代近亲繁殖加强了这种影响。此外，更少的近交个体达到并存活的生殖阶段比远交的。然而，幸存的近交系和远交系雄性在红喉或蓝眼着色的强度上没有显着差异。我们的数据表明，即使是一代近亲繁殖导致的损失健身threespine刺鱼。
Inbreeding depression is a well-studied phenomenon which has been demonstrated in many animal and plant species. In fishes, most studies focus on species of commercial interest. Sticklebacks often colonize new habitats by starting with a small founder population which, thus, suffers a high risk of inbreeding. However, little is known about the degree of inbreeding depression of sticklebacks' life-history traits like fertilization Success or hatching and survival rate. Furthermore, there is a general lack of knowledge about the impact of inbreeding on sexually selected traits like males' breeding coloration. In our study, one generation of inbreeding by brother-sister mating of wild-caught, anadromous sticklebacks significantly lowered the fertilization and hatching success of eggs. This effect was intensified by a second generation of inbreeding. Furthermore, fewer inbred individuals reached and survived the reproductive phase than outbred ones. However, surviving inbred and outbred males did not differ significantly in the intensity of red throat or blue eye coloration. Our data indicate that even one generation of inbreeding leads to a loss of fitness in threespine sticklebacks.