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从非潮环境到潮环境:在下游的繁殖迁移中,中国小的移动行为
Heleen Keirsebelik1, Pieterjan Verhelst2, Bram D'hondt2
1Department of Biology, ECOSPHERE Research Group, University of Antwerp, Universiteitsplein 1C, 2610, Wilrijk, Belgium. Heleen.keirsebelik@uantwerpen.be.
Movement ecology
|April 4, 2025
概括
中国手套 (Eriocheir sinensis) 使用选择性潮流运输来节约其在125公里的繁殖迁移期间的能量. 这种节能行为对于它们在生命周期的最后阶段的生存至关重要.
科学领域:
- 水生生态学 水生生态学
- 侵入性物种生物学 侵入性物种生物学
- 动物行为 动物行为
背景情况:
- 中国小手 (Eriocheir sinensis) 是一个具有全球意义的物种,在本地范围商业上有价值,在其他地方被认为是入侵性物种.
- 像中国手套这样的类物种,进行了关键的下游产卵迁移到海中,但它们的迁徙行为仍然不太了解.
研究的目的:
- 为了研究成年中国手套在下游向大海的旅途中的迁徙行为.
- 确定影响不同河流和河口地区迁移模式和速度的环境因素.
主要方法:
- 采用声学遥测技术,追踪34只成年中国手套在125公里的迁徙.
- 六只配备了先进的标签,包括加速度计和压力传感器,用于监测活动和深度.
主要成果:
- 所有跟踪的都向下游迁移,偏爱更深的河流部分,并到达中氨酸-多氨酸河口边界,被认为是产卵场.
- 与潮河口 (每天1.29公里) 相比,非潮淡水河流 (每天4.65公里) 的迁移速度显著更高.
- 主要在夜间在淡水中迁移,这种模式在河口中发生了转变,潮流影响了潮时下游的运动.
结论:
- 中国手套表现出适应性迁移策略,包括在淡水中夜间移动以尽量减少掠食和选择性潮流运输以节省能源.
- 这种节能的迁移策略对于最大限度地提高身体健康和确保在生命的最后阶段成功繁殖至关重要.
- 这项研究提供了第一个直接证据,证明成年中国手套的选择性潮流运输利用,为其生命史提供了关键的见解.
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