...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Marine ecology progress series >Influence of individual state on swimming capacity and behaviour of Antarctic krill Euphausia superba
【24h】

Influence of individual state on swimming capacity and behaviour of Antarctic krill Euphausia superba

机译：个体状态对南极磷虾南极磷虾游泳能力和行为的影响

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

Swarms of Antarctic krill are frequently biased towards certain body sizes, sexes, maturities and physiological states. However, the mechanisms causing such biases remain unclear, with some speculating on differential responses to chemical or visual cues. This study examines the influence of individual state on swimming behaviour and performance, which, in turn, may cause biases in swarm composition. The frequency and strength of pleopod beats as well as the overall swimming capacity of Antarctic krill Euphausia superba were measured using a tethering technique. Individual state was considered in terms of body size, sex, maturity, moult stage and stomach fullness. Significant differences in the rate and strength of pleopod strokes as well as in the overall swimming capacity were found between individuals in different states. Body size had one of the strongest influences, with beat rate decreasing and beat strength increasing with increasing size. The sex and maturity of an individual altered this pattern, with adult females having faster but weaker pleopod beats than males of equivalent size. The difference in swimming style of females may impose a different lifestyle to that of males. Moult stage also had a significant influence on swimming, with moulting/post-moult individuals having significantly lower swimming capacities, making them unlikely to keep pace with intermoult counterparts. Both the rate and the strength of the pleopod beat were significantly lower in satiated compared to unsatiated individuals, which may contribute to the dispersion of swarms during feeding.
机译：南极磷虾群经常偏向某些体型，性别，成熟度和生理状态。但是，引起这种偏差的机制仍不清楚，有人推测其对化学或视觉线索的不同反应。这项研究考察了个人状态对游泳行为和表现的影响，而游泳行为和表现又可能导致群体组成的偏差。使用束缚技术测量了浮足动物节拍的频率和强度，以及南极磷虾Euphausia superba的总体游泳能力。从体型，性别，成熟度，蜕变阶段和胃饱满度考虑个体状态。在不同状态的个体之间，发现了足脚中风的速度和强度以及整体游泳能力的显着差异。体型是影响最大的因素之一，搏动率随着大小的增加而降低，搏动强度也随之增加。个体的性别和成熟度改变了这种模式，成年雌性的节肢动物节律比同等大小的男性更快但更弱。女性游泳风格的差异可能会赋予男性不同的生活方式。换羽阶段也对游泳产生重大影响，换羽/换羽后个体的游泳能力明显降低，这使得他们不太可能与换羽同龄者并驾齐驱。与未饱食者相比，饱足者的腹足节拍的频率和强度均显着降低，这可能有助于在进食期间成群地分散。

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