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Prioritising the rehabilitation of fish passage in a regulated river system based on fish movement

机译：在基于鱼类运动的受管制河流系统中优先恢复鱼类通过

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摘要

Environmental rehabilitation budgets are often limited, and management actions need to be prioritised to achieve the best outcomes. Prioritisation can best be done when evidence informs the decision-making process. We acoustically tagged twenty Golden Perch (Macquaria ambigua) in the Loddon River, Australia, and tracked their movements to gain an understanding on the requirements for fish passage at a major regulating structure, the Box Creek regulator. The movements of these fish were monitored through a network of receivers located throughout the lower Loddon River and Pyramid Creek system. Five fish moved 50-120 km upstream, four of which reached the Box Creek regulator before moving back downstream to the entrance of the Kerang Lakes system. Most long distance upstream movements were associated with an increase in river discharge. The remaining 15 fish moved ＜20 km, with all fish being detected at least once. This pilot study indicates that Box Creek regulator is acting as a barrier for some fish within the Loddon River system. Movement data also indicate that Golden Perch migration pathways may be influenced by river discharge. The management implications of this work includes the need to reinstate fish passage at Box Creek regulator and the potential use of environmental flows to enhance colonisation of native fish species throughout the Murray Darling Basin.
机译：环境恢复预算通常很有限，需要优先考虑管理措施以取得最佳结果。当证据有助于决策过程时，最好进行优先级排序。我们在澳大利亚洛登河上用声学方法标记了二十个金鲈（Macquaria ambigua），并跟踪它们的运动，以了解在主要调节结构Box Creek调节器上对鱼类通过的要求。这些鱼的活动通过遍布整个洛登河下游和金字塔溪系统的接收器网络进行监控。五条鱼向上游移动了50-120公里，其中四条到达Box Creek调节器，然后又向下游移动回到Kerang湖系统的入口。大多数长距离上游运动与河水流量增加有关。其余15条鱼移动了＜20 km，所有鱼至少被检测到一次。这项初步研究表明，Box Creek调节器正在作为Loddon River系统中某些鱼类的屏障。运动数据还表明，金河鲈的迁移途径可能受到河流流量的影响。这项工作的管理意义包括需要恢复Box Creek监管机构的鱼类通行以及可能利用环境流量来增强整个墨累达令盆地本地鱼类物种的定殖。

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  • 来源
    《Ecological management & restoration》 |2015年第1期|67-72|共6页
  • 作者

    Justin OConnor; Frank Amtstaetter; Matthew Jones; John Mahoney;

  • 作者单位

    Arthur Rylah Institute for Environmental Research (Department of Sustainability and Environment, 123 Brown Street, Heidelberg 3084, Vic., Australia);

    Arthur Rylah Institute for Environmental Research (Department of Sustainability and Environment, 123 Brown Street, Heidelberg 3084, Vic., Australia);

    Arthur Rylah Institute for Environmental Research (Department of Sustainability and Environment, 123 Brown Street, Heidelberg 3084, Vic., Australia);

    Arthur Rylah Institute for Environmental Research (Department of Sustainability and Environment, 123 Brown Street, Heidelberg 3084, Vic., Australia);

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    barriers; fish migration; fish movement pathways; flow; rehabilitation; river connectivity;

    机译：障碍鱼类迁移;鱼类移动途径;流;复原;河流连通性;

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