研究人员在大西洋鳕鱼（Gadus morhua）的冬季产卵季节对465条成熟的大西洋鳕鱼进行了追踪，结果表明，与体型较小的雌性大西洋鳕鱼相比，体型较大的雌性大西洋鳕鱼（体长达114厘米）的运动网络更为复杂。大型雄鱼数量稀少，但表现出相似的运动模式。
这些发现意味着，促进大型鱼类的管理计划将通过促进对产卵栖息地多样性的持续利用以及它们之间的连通性，进而对种群的恢复能力产生积极影响。
据悉，地球生态系统中的大型动物越来越少。全球模拟表明，自然界的这种缩小对生物圈的功能产生了严重后果。然而，大型动物的历史性消失意味着现在往往无法获得揭示其真正生态重要性的经验数据。
附：英文原文
Title:
Author: Esben Moland Olsen, rjan Karlsen, Jon Egil Skjraasen
Issue&Volume: 2023-12-08
Abstract: The Earth’s ecosystems are increasingly deprived of large animals. Global simulations suggest that this downsizing of nature has serious consequences for biosphere functioning. However, the historical loss of large animals means that it is now often impossible to secure empirical data revealing their true ecological importance. We tracked 465 mature Atlantic cod (Gadus morhua) during their winter spawning season and show that large females (up to 114 centimeters in length), which are still found in mid-Norway, were characterized by more complex movement networks compared with smaller females. Large males were sparse but displayed similar movement patterns. Our finding implies that management programs promoting large fish will have positive impacts on population resilience by facilitating the continued use of a diversity of spawning habitats and the connectivity between them.
DOI: adi1826
Source: https://www.science.org/doi/10.1126/science.adi1826