剑鱼的移动行为提供了温带和热带西南太平洋之间的连接性
Sean R Tracey1, Barrett W Wolfe2, Klaas Hartmann2
1Institute for Marine and Antarctic Studies, University of Tasmania, Private Bag 49, Hobart, TAS, 7001, Australia. sean.tracey@utas.edu.au.
Scientific reports
|July 21, 2023
概括
卫星标签显示,澳大利亚东南部的成年剑鱼 (Xiphias gladius) 进行广泛的迁徙,前往更温暖的珊瑚海水域,可能是为了繁殖. 一些个人表现出现场的忠诚度,在他们旅行后回到释放地点附近.
科学领域:
- 海洋生物学 海洋生物学
- 渔业 科学 渔业 科学
- 动物迁徙 动物迁徙
背景情况:
- 剑鱼 (Xiphias gladius) 是全球分布的海底鱼类,对渔业至关重要.
- 在高度的大型成年人有影响人口动态和管理的运动.
- 关于西南太平洋剑鱼的移动存在有限的数据,特别是进入较冷的水域.
研究的目的:
- 描述剑鱼在澳大利亚东南部温带水域的运动.
- 了解成年剑鱼的迁徙行为和息地使用情况.
- 为了告知这种物种的渔业管理和种群动态.
主要方法:
- 弹出式卫星档案传输标签部署在塔斯曼海西部的11只剑鱼 (50-350公斤) 上.
- 标记数据分析了56-250天的运动模式,深度和行为.
- 行为建模以评估水温和月相对剑鱼运动的影响.
主要成果:
- 11只被标记的剑鱼中有4只向北迁移到珊瑚海 (11-24°S),旅行了高达3275公里.
- 迁徙的剑鱼聚集在23-27°C的水域,这表明产卵相关的部分迁徙.
- 剑鱼表现出极端的垂直迁移,深度受到光衰减和月相的影响.
- 一条鱼表现出现场忠诚度,在产卵季节结束后回到释放地点附近.
结论:
- 澳大利亚东南部的剑鱼向北大量迁移,这可能与在温暖的水域产卵有关.
- 了解这些运动对于剑鱼种群的有效渔业管理至关重要.
- 每个垂直迁移模式都受到环境因素的影响,对渔业相互作用有影响.
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