...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Canadian Journal of Fisheries and Aquatic Sciences >Nonrandom mating in a broadcast spawner: mate size influences reproductive success in Atlantic cod (Gadus morhua)
【24h】

Nonrandom mating in a broadcast spawner: mate size influences reproductive success in Atlantic cod (Gadus morhua)

机译：广播繁殖器中的非随机交配：配偶的大小会影响大西洋鳕的繁殖成功（Gadus morhua）

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

We tested the hypothesis that reproductive success in Atlantic cod (Gadus morhua) is random with respect to similarity in body size between mates. Immediately prior to their natural breeding periods, groups of 52-93 cod from three Northwest Atlantic populations were transported to a large (15 m diameter, 4 m deep) tank where they spawned undisturbed at densities similar to those in nature. Based on microsatellite DNA-parentage assignment of 8913 offspring from four spawning groups, females and males achieved their highest reproductive success when breeding with mates that were larger than themselves. Our observations are consistent with the hypothesis that some form of intrasexual competition or mate choice is a constituent of the mating system of this species and that this can have an important influence on individual fitness. Our results further suggest that reductions in the mean and variance in body size of commercially exploited marine fishes concomitant with size-selective harvesting may have greater negative consequences for population recovery than previously thought.
机译：我们测试了这样的假设，即大西洋鳕鱼（Gadus morhua）的繁殖成功在伴侣之间的体型相似方面是随机的。在自然繁殖期即将来临之前，来自西北大西洋三个种群的52-93鳕鱼群被运输到一个大的（直径15 m，深4 m的）鱼缸中​​，它们以与自然相似的密度产卵。根据来自四个产卵组的8913个后代的微卫星DNA亲本分配，雌性和雄性在与比自己更大的伴侣繁殖时获得了最高的繁殖成功率。我们的观察结果与以下假设相吻合：一种形式的内部竞争或伴侣选择是该物种交配系统的组成部分，并且这可能对个体适应性产生重要影响。我们的结果进一步表明，与尺寸选择捕捞同时进行的商业开发海鱼平均尺寸和方差的减小可能对种群恢复产生更大的负面影响。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号