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在定居过渡期间,早期幼年西波罗的海 (Gadus morhua) 的食物摄入量

Anton Höper¹, Nicole Funk¹, Felix Mittermayer²

¹Department of Biology, Institute for Marine Ecosystem and Fishery Science, Centre for Earth System Research and Sustainability (CEN), University of Hamburg, Hamburg, Germany.

Journal of fish biology

|September 25, 2025

概括

青少年大西洋鱼过渡到生活在46-87毫米左右的底部生活方式,严重依赖Diastylis rathkei. 由于氧气不足,Diastylis rathkei的可用性下降可能会影响鱼的招募.

科学领域:

海洋生物学海洋生物学
生态生态学生态生态学
渔业科学渔业科学

背景情况:

大西洋鱼 (Gadus morhua) 的早期生命阶段表现出从海底鱼类到盆地鱼类养习惯的关键过渡.
在这个定居阶段了解猎物动态对于评估招聘成功至关重要.

研究的目的:

确定早期幼年大西洋鱼在过渡到盆地生活方式期间的饮食转变和关键猎物物.
评估Diastylis rathkei作为一个关键的猎物物种的作用及其对西波罗的海鱼招募的潜在影响.

主要方法:

从西波罗的海 (2020-2022) 采集的203只未成年大西洋鱼 (17-101毫米标准长度) 的肠道含量分析.
对海底,中间和盆地猎物的量化,以确定与鱼大小 (总长度) 相对的饮食模式.

主要成果:

据估计,从浮游生物食到盆地食的过渡发生在总长度在46-87毫米之间.
Pelagic 幼鱼主要食用的是足动物 (Acartia spp. ),转向双幼虫,然后在定居时严重依赖Diastylis rathkei.
鱼 (Diastylis rathkei) 是刚刚定居的鱼的关键猎物,这表明它作为招募瓶物种的重要性.

结论:

这项研究确定了青少年大西洋鱼的独特的本体遗传饮食转变,Diastylis rathkei在定居阶段至关重要.
与波罗的海西部传播氧气最小区相关的Diastylis rathkei的可用性下降可能是最近低鱼招募成功的一个重要因素.

关键词:

波罗的海波罗的海波罗的海盖达斯 (Gadus morhua) 是一个比较古老的动物.年轻的鱼.人体基因的饮食变化转变.结算解决方案结算解决方案胃中的内容.

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