沿海和东北北极鱼生态型在高度的移动多样性和部分相似性
John Fredrik Strøm1, Thomas Bøhn1, Jon Egil Skjaeraasen2
1Institute of Marine Research, Tromsø, Norway.
The Journal of animal ecology
|July 24, 2023
概括
大西洋鱼生态型的运动多样性显示出各种息地使用. 东北北极鱼和挪威沿海鱼表现出不同的,但重叠的移动模式,这对渔业管理至关重要.
科学领域:
- 海洋生态海洋生态学
- 渔业 科学 渔业 科学
- 生物多样性研究 生物多样性研究
背景情况:
- 物种内部的运动多样性是影响生态相互作用和渔业的生物多样性的关键组成部分.
- 大西洋鱼 (Gadus morhua) 包含不同的生态类型,包括高度迁徙的东北北极鱼 (NEA) 和定居的挪威沿海鱼,具有不同的保护状态.
研究的目的:
- 调查和描述高度峡湾系统内NEA鱼和挪威沿海鱼生态型的运动多样性.
- 使用先进的追踪和遗传方法,比较这两种生态型之间的峡湾居住和移动模式.
主要方法:
- 结合了来自单个鱼类跟踪的声学遥测数据与新型遗传分析.
- 在两个挪威峡湾系统中监测了NEA鱼和挪威沿海鱼的移动模式.
主要成果:
- 与NEA鱼相比,沿海鱼在峡湾中的居住时间更高.
- 尼阿鱼更有可能永久地和更早地离开峡湾,特别是在产卵季节,而沿海鱼则显示出更多的临时离开.
- 在每个生态型中观察到显著的移动多样性,其中一些NEA鱼保持全年居民状态,一些沿海鱼表现出较低的峡湾忠诚度.
- 峡湾的居住和离开时间受到产卵状态和身体大小的影响.
结论:
- 结果突出了大西洋鱼生态型内的大量移动多样性,挑战了基于人口级监测的先前假设.
- 观察到生态型之间的相似居住,表明复杂的息地使用模式.
- 调查结果强调,渔业管理需要考虑个体移动多样性和息地使用,以便为交互的鱼生态型提供有效的保护建议.
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