...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Proceedings of the Royal Society. Biological sciences >Less is more: Density influences the development of behavioural life skills in trout
【24h】

Less is more: Density influences the development of behavioural life skills in trout

机译：少即是多：密度影响鳟鱼行为生活技能的发展

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

Theory suggests that habitat structure and population density profoundly influence the phenotypic development of animals. Here, we predicted that reduced rearing density and increased structural complexity promote food search ability, anti-predator response and the ability to forage on novel prey, all behavioural skills important for surviving in the wild. Brown trout were reared at three densities (conventional hatchery density, a fourth of conventional hatchery density and natural density) in tanks with or without structure. Treatment effects on behaviour were studied on trout fry and parr, whereupon 20 trout from each of the six treatment groups were released in an enclosed natural stream and recaptured after 36 days. Fry reared at natural density were faster to find prey in a maze. Moreover, parr reared at natural density were faster to eat novel prey, and showed more efficient anti-predator behaviour than fish reared at higher densities. Furthermore, parr reared at reduced densities were twice as likely to survive in the stream as trout reared at high density. In contrast, we found no clear treatment effects of structure. These novel results suggest that reduced rearing densities can facilitate the development of behavioural life skills in captive animals, thereby increasing their contribution to natural production.
机译：理论表明，栖息地的结构和种群密度深刻影响动物的表型发育。在这里，我们预测降低的饲养密度和增加的结构复杂性会提高食物搜索能力，抗捕食者的反应能力以及觅食新型猎物的能力，而这对于在野外生存至关重要。在有或没有结构的水箱中以三种密度（常规孵化场密度，常规孵化场密度和自然密度的四分之一）饲养褐鳟。在鳟鱼苗和parr上研究了处理对行为的影响，随后将六个处理组中的每组20条鳟鱼以封闭的自然流释放，并在36天后重新捕获。以自然密度饲养的鱼苗在迷宫中觅食的速度更快。此外，与以较高密度饲养的鱼相比，以自然密度饲养的幼鱼更快地吃新的猎物，并且表现出更有效的抗捕食行为。此外，以低密度饲养的鲑鱼在溪流中存活的可能性是高密度饲养的鳟鱼的两倍。相反，我们发现没有明显的结构治疗效果。这些新颖的结果表明，降低饲养密度可以促进圈养动物行为生活技能的发展，从而增加其对自然生产的贡献。

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