...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The Journal of Experimental Biology >Kinematics of ram filter feeding and beat-glide swimming in the northern anchovy Engraulis mordax
【24h】

Kinematics of ram filter feeding and beat-glide swimming in the northern anchovy Engraulis mordax

机译：RAM过滤器喂养和击败北Anchovy Engraulis Mordax的运动喂养和击败游泳

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

In the dense aquatic environment, the most adept swimmers are streamlined to reduce drag and increase the efficiency of locomotion. However, because they open their mouth to wide gape angles to deploy their filtering apparatus, ram filter feeders apparently switch between diametrically opposite swimming modes: highly efficient, streamlined 'beat-glide' swimming, and ram filter feeding, which has been hypothesized to be a high-cost feeding mode because of presumed increased drag. Ram filter-feeding forage fish are thought to play an important role in the flux of nutrients and energy in upwelling ecosystems; however, the biomechanics and energetics of this feeding mechanism remain poorly understood. We quantified the kinematics of an iconic forage fish, the northern anchovy, Engraulis mordax, during ram filter feeding and non-feeding, mouth-closed beat-glide swimming. Although many kinematic parameters between the two swimming modes were similar, we found that swimming speeds and tailbeat frequencies were significantly lower during ram feeding. Rather than maintain speed with the school, a speed which closely matches theoretical optimum filter-feeding speeds was consistently observed. Beat-glide swimming was characterized by high variability in all kinematic parameters, but variance in kinematic parameters was much lower during ram filter feeding. Under this mode, body kinematics are substantially modified, and E. mordax swims more slowly and with decreased lateral movement along the entire body, but most noticeably in the anterior. Our results suggest that hydrodynamic effects that come with deployment of the filtering anatomy may limit behavioral options during foraging and result in slower swimming speeds during ram filtration.
机译：在密集的水生环境中，最擅长的游泳者被简化以减少拖累并提高运动效率。但是，因为它们张开宽阔的Gape角度来部署其过滤设备，RAM过滤器馈线明显在截然相反的游泳模式之间切换：高效，流线型的“搏动的”击败滑动“游泳，以及RAM过滤器进给，已被假设为由于推定增加的阻力，送低成本的送料模式。 RAM过滤饲料饲料鱼被认为在升高的生态系统中营养和能量的助焊剂中发挥着重要作用;然而，这种饲养机制的生物力学和能量仍然明白。我们在RAM过滤器喂养和非喂食中，北凤尾鱼，北凤尾鱼，北凤尾鱼，Engraulis Mordax的运动学进行量化。虽然两个游泳模式之间的许多运动参数都是相似的，但我们发现在RAM进料过程中游泳速度和尾射线频率显着降低。不断观察到始终观察到与学校保持速度，而不是保持速度，这是一种紧密匹配理论上最佳过滤馈送速度的速度。击败滑行游泳的特点是所有运动学参数的差异性高，但在RAM过滤器进料过程中，运动学参数的差异要低得多。在这种模式下，体质运动学被大幅修改，E.Mordax更慢地游泳，并且沿整个身体下降减小，但在前部中最明显。我们的研究结果表明，滤波解剖学的伴随的流体动力学效应可能会限制在觅食期间的行为选择，并导致RAM过滤期间的游泳速度较慢。

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