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首页> 外文期刊>Marine biology >Juvenile white sharks Carcharodon carcharias use estuarine environments in south-eastern Australia
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Juvenile white sharks Carcharodon carcharias use estuarine environments in south-eastern Australia

机译：幼白鲨Carcharodon carcharias在澳大利亚东南部利用河口环境

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Estuarine environments are known to provide important feeding, breeding, resting and nursery areas for a range of shark species, including some which are considered dangerous to humans. Juvenile white sharks (<3 m) are known to frequent inshore environments, particularly ocean beaches, but their presence in and use of estuaries and coastal embayments is unclear. Given that estuarine environments are often surrounded by highly populated areas, understanding how white sharks use these environments will not only assist with their conservation management, but also inform public safety policies. The use of estuarine environments by acoustic-tagged white sharks was investigated from 2009 to 2015 at Port Stephens, New South Wales and Corner Inlet, Victoria, both of which adjoin known nursery areas for the species. Juvenile white sharks were detected within both estuaries, with 20 individuals recorded within the Port Stephens estuary, including four on one day. Only one tagged shark was detected within Corner Inlet; however, monitoring effort and local tagging in the area was more restricted. Detections in Port Stephens were predominantly from October to January and peaked in November. This study demonstrates that the footprint of known nursery areas for white sharks in eastern Australia should be expanded to include their adjacent estuarine environments. Consequently, there is clear potential for them to be exposed to a range of anthropogenic estuarine impacts, and that human interactions are more likely over warmer periods (summer), when human use of such waterways is more prevalent.
机译：众所周知，河口环境可为各种鲨鱼种类（包括对人类有害的某些鲨鱼）提供重要的觅食，繁殖，休息和育苗区。少年白鲨（<3 m）在频繁的近海环境中，特别是在海洋海滩中是众所周知的，但是它们在河口和沿海隔离带中的存在和使用尚不清楚。鉴于河口环境通常被人口稠密的地区所包围，了解白鲨如何使用这些环境不仅有助于其鲨鱼的保护管理，而且有助于制定公共安全政策。从2009年到2015年，在新南威尔士州的史蒂芬斯港和维多利亚的Corner Inlet调查了带有声标签的白鲨对河口环境的利用，这两个区域都毗邻该物种的已知苗圃区。在两个河口中均发现了幼小的白鲨，在史蒂芬斯港河口中记录了20个人，其中一天有4个人。在“角落入口”内仅检测到一个标记过的鲨鱼；但是，该地区的监控工作和本地标记受到更多限制。斯蒂芬斯港的检出量主要在10月到1月之间，并在11月达到高峰。这项研究表明，应该扩大澳大利亚东部已知的白鲨苗圃区域的足迹，以包括其邻近的河口环境。因此，很明显，它们可能会受到一系列人为的河口影响，而且当人类更普遍使用这种水道时，在较暖的时期（夏季），人类的相互作用更有可能发生。

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