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首页> 外文期刊>Marine ecology progress series >Spatial and temporal use of spawning aggregation sites by the tropical sciaenid Protonibea diacanthus
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Spatial and temporal use of spawning aggregation sites by the tropical sciaenid Protonibea diacanthus

机译：热带的坐骨神经质Protonibea diacanthus对产卵聚集点的时空利用

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摘要

Fish spawning aggregations (FSA) are generally spatially and temporally predictable, making them particularly vulnerable to fishing, which is capable of rapidly removing a significant proportion of the aggregated adults and reducing egg production. These effects may cause the loss of the aggregation altogether. In the Northern Territory (NT), Australia, repeated fishing of known aggregations of the tropical sciaenid species, the blackspotted croaker Protonibea diacanthus, is probably unsustainable, particularly given this species' decline elsewhere. Acoustic monitoring was used to examine the temporal and spatial movement patterns and site fidelity of P. diacanthus in the NT. Fish were only detected at their respective aggregations, providing no evidence of large-scale movements between FSA. There was evidence for behavioural polymorphism in the aggregations, and fish monitored for ≥1 yr showed decreased presence during cooler months and increased presence during warmer months when peak spawning occurs. The tidal cycle significantly influenced the detection of tagged fish, with detections peaking on running tides, the peak period for catching P. diacanthus, suggesting that this is when they feed. This study has provided important information on the connectivity and dynamics of P. diacanthus aggregations in the NT, including crucial information for implementing appropriate management strategies for this vulnerable species. There appears to be little interchange of adult P. diacanthus at the spatial scale examined, which suggests that the separate FSA examined support separate adult populations. The presence of seemingly separate spawning populations of P. diacanthus has significant implications for their management, with the potential for each aggregation to be vulnerable to localised depletion.
机译：鱼卵聚集体（FSA）通常在空间和时间上都是可预测的，这使它们特别容易受到捕捞的影响，从而能够迅速去除相当一部分成年聚集体并减少产卵量。这些影响可能完全导致聚合的丢失。在澳大利亚的北领地，反复捕捞已知的热带sciaenid物种，黑斑的黄花鱼Protonibea diacanthus的聚集体，可能是不可持续的，特别是考虑到该物种在其他地方的衰落。使用声学监测来检查北半球念珠菌的时空运动模式和部位保真度。仅在各自的聚集处检测到鱼，没有提供FSA之间大规模移动的证据。有证据表明聚集物中存在行为多态性，监测≥1年的鱼在出现高峰产卵时，在较凉的月份中存在减少，而在较温暖的月份中存在增加。潮汐周期显着影响了带标签鱼的检测，检测峰值出现在潮汐中，即捕捞P. diacanthus的高峰期，表明这是它们摄食的时间。这项研究提供了有关北领地P. diacanthus聚集体的连通性和动态的重要信息，包括为该脆弱物种实施适当管理策略的重要信息。在所考察的空间尺度上，成虫P. diacanthus几乎没有互换性，这表明，所检验的单独的FSA支持了不同的成年种群。看似分离的产假蝇的种群的存在对它们的管理具有重要意义，每种聚集都有可能容易遭受局部消耗。

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  • 来源
    《Marine ecology progress series》 |2010年第22期|p.193-203|共11页
  • 作者

    Jayson M. Semmens; C. D. Buxton; E. Forbes; M. J. Phelan;

  • 作者单位

    Marine Research Laboratory, Tasmanian Aquaculture and Fisheries Institute, University of Tasmania, Private Bag 49, Hobart, Tasmania 7001, Australia;

    rnMarine Research Laboratory, Tasmanian Aquaculture and Fisheries Institute, University of Tasmania, Private Bag 49, Hobart, Tasmania 7001, Australia;

    rnMarine Research Laboratory, Tasmanian Aquaculture and Fisheries Institute, University of Tasmania, Private Bag 49, Hobart, Tasmania 7001, Australia;

    rnDepartment of Primary Industries, Fisheries and Mines, GPO Box 3000, Darwin, Northern Territory 0801, Australia Tourism and Visitor Services, Environmental Protection Agency, Whitsunday Office, PO Box 332, Airlie Beach, Queensland 4802, Australia;

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  • 正文语种 eng
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  • 关键词

    spawning aggregation; site fidelity; acoustic monitoring; sciaenidae; fisheries management; movement; tidal cycle;

    机译：产卵聚集现场保真度;声音监控;cia科渔业管理;运动;潮汐周期;

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