...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Deep-Sea Research >A miniature biomimetic sonar and movement tag to study the biotic environment and predator-prey interactions in aquatic animals
【24h】

A miniature biomimetic sonar and movement tag to study the biotic environment and predator-prey interactions in aquatic animals

机译：用于研究生物动物的生物环境和捕食者 - 猎物相互作用的微型仿生声纳和运动标签

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

How predators find, select and capture prey is central to understanding trophic cascades and ecosystem structure. But despite advances in biologging technology, obtaining in situ observations of organisms and their interactions remains challenging in the marine environment. For some species of toothed whales, echoes from organisms insonified by echolocation clicks and recorded by sound logging tags have provided a fine-scale view of prey density, and predator and prey behaviour during capture attempts, but such information is not available for marine predators that do not echolocate. Here the development and performance of a miniature biomimetic sonar and movement tag capable of acquiring similar data from non-echolocating marine predators is reported. The tag, weighing 200 g in air, records wide bandwidth sonar data at up to 50 pings a second synchronously with fast-sampling sensors for depth, acceleration, magnetic field and GPS. This sensor suite enables biotic conditions and predator behaviour to be related to geographic location over long-duration foraging trips by apex marine predators. The sonar operates at 1.5 MHz with a 3.4 degrees beamwidth and a source level of 190 dB re 1 mu Pa at 1 m. Sonar recordings from a trial deployment of the tag on a southern elephant seal contained frequent targets corresponding to small organisms up to 6 m ahead of the tagged animal. Synchronously sampled movement data allowed interpretation of whether the seal attempted to capture organisms that it approached closely while the high sonar ping rate revealed attempts by prey to escape. Results from this trial demonstrate the ability of the tag to quantify the biotic environment and to track individual prey captures, providing fine-scale information on predator-prey interactions which has been difficult to obtain from non-echolocating marine animals.
机译：捕食者如何找到，选择和捕获猎物是理解营养级联和生态系统结构的核心。尽管生物工艺技术进步，但在海洋环境中获得了对生物体的原因观察及其相互作用仍然具有挑战性。对于某些物种齿鲸，由回声分配点击并通过声音记录标签记录的生物体的回声提供了捕获尝试期间的猎物密度和捕食者和捕食者行为的精细视图，但这些信息不适用于海洋捕食者不要偏离。这里，据报道了能够获取来自非呼应船舶捕食者类似数据的微型生物摩擦声卡和运动标签的开发和性能。重量200 G在空气中的标签，与快速采样传感器同步地将宽带宽声纳数据记录在多达50平时，有用于深度，加速度，磁场和GPS的快速采样传感器。该传感器套件使得生物条件和捕食者行为能够通过顶点海洋捕食者与长期觅食跳闸的地理位置相关。声纳以1.5 MHz运行，3.4度波束宽度，源电平为190 dB Re 1 mu Pa，在1米。 Sonar录制从南部大象密封上的标签的试验部署包含频繁的目标，该频繁的目标对应于标记的动物前面的小生物，高达6米。同步采样的运动数据允许解释密封是否试图捕获它在密切接近的生物体中，而高声卡平率揭示了猎物逃脱的尝试。该试验的结果证明了标签量化生物环境的能力，并跟踪各个猎物捕获，提供有关难以获得的捕食性船舶动物的捕食者 - 猎物相互作用的微量信息。

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