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大西洋鱼 (Gadus morhua) 在凯尔特海的分布趋势变化

Jonathan V Ellis¹, Pia Schuchert², D Michael Scantlebury³

¹School of Biological Sciences, University of Aberdeen, Aberdeen, UK.

Journal of fish biology

|March 12, 2024

概括

大西洋鱼 (Gadus morhua) 库存正在减少,分布正在转变. 西苏格兰的鱼向北和东移动,而爱尔兰和凯尔特海的鱼群向西移动,影响了恢复工作.

科学领域:

海洋生物学海洋生物学
渔业科学渔业科学
生态系统动态生态系统动态

背景情况:

许多大西洋鱼 (Gadus morhua) 在南部的种群尽管有渔业管理,但仍在耗尽.
将鱼分布转移到定义管理区以外的地方,可能会阻碍鱼群的恢复.

研究的目的:

调查1985年至2021年三大西洋鱼种群 (苏格兰西部,爱尔兰海,凯尔特海) 的分布变化.
分析鱼密度,深度,温度和分布区域的趋势.

主要方法:

利用国际协调的拖网调查数据.
绘制了鱼密度的地图,并分析了加权平均深度和底部温度趋势.
计算了每个股票的重心和同等面积.

主要成果:

苏格兰西部的鱼种群向北和东移动,延伸到北海.
爱尔兰海和凯尔特海鱼种群的分布向西转移.
所有种群在相当面积上都呈现下降趋势;没有观察到明确的深度趋势.
没有发现底部温度和鱼分布之间的显著关系.

结论:

西苏格兰鱼的向北转移证明了其被纳入一个更大的北海库存单元,有助于恢复.
爱尔兰海和凯尔特海的鱼分布保持稳定,这表明最近的温度没有影响它们.
未来的变暖可能会影响这些鱼种群的繁殖限制和分布.

关键词:

大西洋的鱼大西洋鱼.凯尔特海是凯尔特人的海.分销班的时间变化.库存下降减少库存下降

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