...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Fish Biology >Thermal growth performance of juvenile brown trout Salmo trutta: no support for thermal adaptation hypotheses
【24h】

Thermal growth performance of juvenile brown trout Salmo trutta: no support for thermal adaptation hypotheses

机译：少年鳟鱼的热生长性能：不支持热适应假设

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

Using thermal growth data from eight populations of anadromous and lake-feeding brown trout Salmo trutta, hypotheses of adaptation to local optima and countergradient variation in growth were tested. The adaptation to local optima hypothesis suggests that natural selection can shift optimal performance temperatures to match the prevailing temperature in a new or changed thermal niche. In contradiction, the countergradient variation hypothesis suggests that populations from hostile environments perform better than conspecifics from benign environments at all temperatures. In this study, growth capacity varied between populations but there was no significant correlation between any of the estimated thermal performance parameters (e.g. lower and upper thermal growth limits, optimal temperature for growth and maximum growth capacity) and natural climatic conditions among populations. Hence, S. trutta growth response to temperature lends no support for either of the two suggested thermal adaptation hypotheses. Instead, growth capacity among populations tended to correlate positively with female size at maturity.
机译：利用来自八个食盐性和湖性褐鳟鲑鳟的热生长数据，测试了对局部最佳适应和生长逆梯度变化的假设。对局部最优假设的适应表明，自然选择可以改变最佳性能温度，以匹配新的或变化后的热环境中的主导温度。相反，反梯度变异假说表明，在所有温度下，来自不利环境的种群的表现均优于来自良性环境的种群。在这项研究中，种群之间的生长能力各不相同，但是任何估计的热性能参数（例如，热生长的上下限，最佳生长温度和最大生长能力）与种群之间的自然气候条件之间都没有显着相关性。因此，果蝇对温度的生长响应不支持两个建议的热适应假说中的任何一个。取而代之的是，人口中的增长能力往往与女性成熟时的大小呈正相关。

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