Pelagic fish and shark survivability in recreational fisheries - Biological Sciences PhD Studentship (NERC GW4+ DTP funded)

休闲渔业中的远洋鱼类和鲨鱼生存能力 - 生物科学博士生奖学金（NERC GW4 DTP 资助）

• 批准号: 2556480
• 金额: --
• 依托单位: UNIVERSITY OF EXETER
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2021
• 资助国家: 英国
• 起止时间: 2021 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2556480
• 关键词: Pelagic; fish; shark; survivability; recreational

In the UK, recreational fishing effort expended by an estimated 884,000 fishers in England [in 2012] represented more than 4 million fishing days, and £831 million direct spend. A portion of this effort is directed towards the catch-and-release recreational fishing industry. For some large pelagic fish and shark species, prohibitions on commercial landing exist due to precipitous declines (e.g. porbeagle). By comparison, recreational catch-and-release fisheries are largely unregulated (although stakeholder groups can enact rules of engagement upon their membership), and the ecological consequences of these activities for ecosystems are poorly understood. Knowledge on the post-release behaviour and survivorship of large pelagic fish caught in recreational catch-and-release fisheries will therefore be i) valuable to enhance conservation measures through the refinement of good practice techniques for handling and releasing, and ii) aid delivery of key ecosystem services provided by these animals (by ensuring these animals have the best chance of survival). The current lack of understanding on survivability is particularly challenging as recreational catch-and-release fisheries are often promoted as a sustainable activity, yet in UK waters the effects of this practice is largely unknown. Existing literature suggests variability in fishing and handling practices along with the host environment (e.g. water temperature) can significantly influence post-release survivorship. However, to what degree each of these factors contribute to survivability and which aspects of the catch-release process have the greatest opportunity to deliver evidence-based improvements in survivorship requires scientific investigation.

在英国，估计在英格兰有884,000名渔民（2012年）探索的休闲捕鱼工作代表了超过400万个钓鱼天，直接支出为8.31亿英镑。这项工作的一部分是针对捕获和释放休闲捕鱼行业的。对于一些大型的上层鱼​​类和鲨鱼物种，由于精度下降而存在禁止商业降落的禁令（例如，孔珠）。相比之下，娱乐性的捕获和释放渔业在很大程度上不受监管（尽管利益相关者群体可以对其成员制定参与规则），并且这些活动对生态系统的生态后果的理解很少。因此，关于释放后行为和在休闲捕获捕获渔业中大型鱼类捕获的大型鱼类捕获的知识将是我的知识，因此是我的意识，这是I）通过对处理和释放的良好实践技术来增强保护措施的有价值，以及ii ii）帮助这些动物提供这些动物的关键生态系统（通过确保这些动物提供最佳的生存机会）。目前对生存的了解尤其具有挑战性，因为娱乐性的捕捞和释放渔业经常被提升为可持续活动，但是在英国水域，这种做法的影响在很大程度上是未知的。现有文献表明，捕鱼和处理方法以及宿主环境（例如水温）的可变性可以显着影响释放后生存。但是，这些因素在多大程度上导致生存能力以及捕获释放过程的哪些方面有最大的机会来实现基于证据的生存改善，这需要科学研究。