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Desiree M Moore^1,2, Shannon K Brewer^3,4

¹Oklahoma Cooperative Fish and Wildlife Research Unit, Department of Natural Resource Ecology and Management, 007 Agriculture Hall, Oklahoma State University, Stillwater, OK, 74078, USA.

Scientific reports

|March 28, 2025

概括

河流的碎片化影响了游泳动物小鱼. 这项研究跟踪了阿肯色河鱼 (ARS) 的运动,揭示了冬季下游偏差和春季上游迁移,为这些脆弱鱼类的保护策略提供了信息.

科学领域:

鱼类学鱼类学鱼类学
淡水生态学淡水生态
保护生物学保护生物学

背景情况:

由于大平原南部的河流碎片化,鱼种群的数量正在下降.
有限的知识存在关于游泳动物小的移动模式和时间,阻碍了保护工作.

研究的目的:

量化易受攻击的阿肯色河闪光鸟 (ARS) 的季节性移动模式.
了解冬季和春季运动动态,以告知保护和水资源管理策略.

主要方法:

在2018-2020年期间,使用可见植入物弹性体,被动集成 transponder 和 p-Chip 微型 transponder 标签标记了 4233 个阿肯色河闪光灯 (ARS).
在冬季 (每周一次) 和春季 (每两周一次) 季节进行系统的再捕获采样.
分析与环境变量 (温度,排放,光周期) 和鱼类个体特征相关的移动数据.

主要成果:

标签ARS在冬季表现出主要下游运动偏差,环境因素的影响很小,但个人变化的影响很大.
与较小的同物种相比,较大的个体表现出更大的运动距离.
有证据表明,上游迁移在2月下旬开始,在5月下旬观察到长途迁移,一些人表现出多年居住.

结论:

从冬季末到产卵期加强河流连接的水资源管理策略可以支持迁移性ARS产卵.
改善横向连接可能有利于居民ARS群体.
建议对实验性流量进行进一步的研究,以增强鱼鱼的恢复选择.

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