大西洋鱼的个体空间行为和稳定的同位素结合在一个禁止捕捞的海洋保护区
Christopher T Monk1,2,3, Michael Power4, Carla Freitas1,5
1Institute of Marine Research, Flødevigen Marine Research Station, His, Norway.
The Journal of animal ecology
|October 16, 2023
概括
大西洋鱼表现出多样化的食行为和饮食,与较短的垂直迁移有关于更高的营养水平. 在受保护的海洋区域中,这种表型多样性在没有生存成本的情况下得到维持.
科学领域:
- 海洋生态海洋生态学
- 行为生态学 行为生态学
- 渔业 科学 渔业 科学
背景情况:
- 个体的食行为和饮食被理论化为食.
- 关于野生种群中个体行为类型和饮食之间的关系的经验数据有限.
- 了解这种联系对于预测生态系统对环境变化的反应至关重要.
研究的目的:
- 研究大西洋鱼 (Gadus morhua) 的受保护种群中行为类型和饮食之间的共变性.
- 为了确定行为特征和饮食选择是否会导致生存成本.
- 探索这些关系对热带动态和生态系统稳定的影响.
主要方法:
- 利用声学遥测推断个体行为,特别是垂直迁移距离.
- 分析了稳定的同位素组成 (δ13C和δ15N),以确定饮食和热量位置.
- 在一个禁止捕捞的海洋保护区内,不同行为模式和饮食的个体之间的比较生存率.
主要成果:
- 由于鱼的垂直迁徙距离较短,鱼从更高的食量级消耗了来自更高的食量级的猎物.
- 大西洋鱼的稳定同位素值 (δ13C和δ15N) 随着体型的增加而增加.
- 无论是食行为还是饮食成分都没有显著预测个人生存率.
结论:
- 在受保护的生态系统中,大西洋鱼在没有生存成本的情况下保持了行为和饮食的表型多样性.
- 观察到的饮食和垂直迁移之间的联系表明,在环境变化下,有潜在的食用级流.
- 需要进一步的研究,以了解海洋垂直迁移行为的转变如何影响海洋食物网.
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