一个新的自动释放子增加了大西洋鱼 (Salmo salar) 的存活率
Ross S Glover1, Alastair Stephen1
1SSE Renewables, Inveralmond House, Perth, Scotland.
Journal of fish biology
|August 31, 2023
概括
在夜间使用自动释放释放大西洋鱼,与白天释放相比,显著提高了40%以上的生存率,降低了掠食风险.
科学领域:
- 渔业 科学 渔业 科学
- 保护生物学 保护生物学
- 水生生态学 水生生态学
背景情况:
- 捕捉和运输是一种常见的方法,用于减轻河内障碍对迁徙鱼类的影响.
- 大西洋鱼 (Salmo salar) 在苏格兰的康农河的烟雾被运输到水电设施周围.
- 目前的烟雾释放实践发生在白天,增加了对掠夺的脆弱性.
研究的目的:
- 评估一种新型自动释放 (ARC) 对夜间烟雾释放的有效性.
- 为了比较大西洋鱼的存活率,白天和晚上释放的鱼的存活率.
主要方法:
- 大西洋鱼 (n=99) 配有声学标签.
- 使用ARC,在白天释放的烟雾和在夜间释放的烟雾之间的生存率进行了比较.
- 这项研究是在苏格兰的康农河上进行的.
主要成果:
- 在两组之间观察到释放后死亡率的显著差异.
- 夜间释放的烟雾的生存率比白天释放的烟雾高出40%以上.
- 新的ARC系统显示了改善火灾存活率的潜力.
结论:
- 使用ARCs夜间释放大西洋鱼烟,大大提高了生存率.
- ARC为渔业管理人员提供了一种具有成本效益和可靠的工具,以提高迁徙鱼类的生存率.
- 实施夜间释放可以减轻水电设施对鱼种群的负面影响.
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