湖的形状和迁移行为的特征改变了大西洋鱼的化物迁移成功通过湖泊
Matthew Newton1, Joseph McCallum1, Hannele M Honkanen1
1Scottish Centre for Ecology and the Natural Environment, School of Biodiversity One Health and Veterinary Medicine, University of Glasgow, Glasgow, UK.
Journal of fish biology
|October 24, 2024
概括
大西洋鱼鱼在湖泊中使用随机搜索策略,成功程度因湖泊形状而异. 它们的导航策略从河流流向湖泊搜索转移,尽管一些湖泊存在导航挑战.
科学领域:
- 生态生态学 生态生态学
- 动物行为 动物行为
- 鱼类学 鱼类学 鱼类学
背景情况:
- 迁徙是大西洋鱼 (Salmo salar) 的一个高风险行为.
- 湖泊通道对下游迁徙的鱼烟带来了挑战,原因是方向流不佳.
- 鱼烟雾在河流中是质的,但它们在湖泊中的策略不太了解.
研究的目的:
- 为了调查大西洋鱼是否在缺乏清晰导航线索的湖泊中采用随机搜索策略.
- 为了确定湖盆形状对鱼烟迁移成功的影响.
- 为了将模拟的随机搜索行为与真实世界的远程测量数据进行比较.
主要方法:
- 相关的随机步行模拟被用于模拟鱼走迁移.
- 模拟测试了各种湖盆形状 (矩形,形) 和开始/停止点.
- 模拟的迁移与来自五个真实湖泊的鱼烟雾的遥测数据进行了比较.
主要成果:
- 随机搜索在所有测试的湖泊形状中都取得了成功,但在曲的盆地更有效.
- 具有端到端起点/停止点的矩形盆地比垂直盆地更成功.
- 随机步行模型通常预测迁移成功,但两个湖泊的差异表明了替代策略或抑制导航.
结论:
- 大西洋鱼的航行从河流中的风学转向了湖泊中的随机搜索.
- 湖泊盆地形状影响随机搜索策略的成功.
- 在某些湖泊中,低于最佳的导航可能是由相互冲突的线索或迁移暂停引起的,这表明切换到随机搜索并非普遍的.
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