• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Behavioral Ecology and Sociobiology >Males are sensitive — sex-dependent effect of rearing conditions on nestling growth
【24h】

Males are sensitive — sex-dependent effect of rearing conditions on nestling growth

机译：雄性很敏感-饲养条件对雏鸟生长的性别依赖性影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The sex-dependent effect of environmental conditions on nestlings has been extensively studied in size dimorphic birds. Whether males or females are more sensitive to poor conditions is not yet clear; however, the degree of sexual size-dimorphism, brood size and their interactions seem to influence the pattern. Much less is known about sex-dependent environmental sensitivity in size-monomorphic species, even though it may result in biased sex allocation. We altered the rearing conditions by brood size manipulation in the size-monomorphic collared flycatcher and then examined the sex-specific development of the nestlings. In all analyses, we controlled for the effect of paternity, because one may expect extra-pair young to be of better genetic quality and perform better at least under poor conditions. However, this was not the case, because we did not find any difference in growth rate or fledging size between extra- and within-pair young. We found that male nestlings had the potential for faster growth under favourable conditions, but suffered more under poor conditions. We found no sex × environment interaction for fledging size probably because the growth curves level off before fledging, and the disadvantaged nestlings can catch up with their siblings. The larger sensitivity of males does not explain the previously found seasonal shift in brood sex ratios and contradicts previous findings in another size-monomorphic species where females were more sensitive. This suggests that even in size-monomorphic species, no general rule exists, which determines the more sensitive sex.
机译：环境条件对雏鸟的性别依存效应已得到广泛研究。尚不清楚男性还是女性对恶劣条件更敏感；然而，性大小异形的程度，育雏大小及其相互作用似乎会影响这种模式。对大小单态物种中与性别有关的环境敏感性的了解甚少，即使它可能导致性别分配有偏差。我们通过大小单一的领捕蝇器中的育雏尺寸操纵来改变饲养条件，然后检查雏鸟的性别特异性发育。在所有分析中，我们都控制了父权的影响，因为人们可能希望一对成对的年轻人具有更好的遗传质量，并且至少在恶劣条件下表现更好。但是，事实并非如此，因为我们没有发现配对外的和配对内的年轻人之间的增长率或新生大小有任何差异。我们发现，雄性雏鸟在有利条件下有可能更快生长，但在恶劣条件下会遭受更多损失。我们发现，未成年的大小没有性别×环境的相互作用，这可能是因为出雏前的生长曲线趋于平稳，而处于不利地位的雏鸟可以赶上他们的兄弟姐妹。雄性更大的敏感性并不能解释先前发现的育雏性别比的季节性变化，并且与雌性更敏感的另一种大小单态物种的先前发现相矛盾。这表明，即使在大小单一的物种中，也没有普遍的规则可以确定更敏感的性别。

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