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首页> 外文期刊>Marine biology >Restricted vertical and cross-shelf movements of longtail tuna (Thunnus tonggol) as determined by pop-up satellite archival tags
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Restricted vertical and cross-shelf movements of longtail tuna (Thunnus tonggol) as determined by pop-up satellite archival tags

机译：由弹出卫星档案标签确定的LogTail Tuna（Thunnus Tonggol）的限制垂直和跨货架运动

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摘要

The global catch of longtail tuna (Thunnus tonggol) has almost tripled over the past two decades, with recent stock assessments suggesting overexploited stocks. Nine longtail tuna were tracked for 2-115 days with pop-up satellite archival tags off eastern Australia (27.5 degrees S 153.4 degrees E to 27.5 degrees S 153.4 degrees E) to better understand their movements, habitat specificity, and post-capture mortality. Fish primarily utilised coastal waters of 0-25 m (maximum 90 m) and water temperatures of 23-28 degrees C (17.1-28.5 degrees C). All fish moved north for distances of up to 654 km, with three fish moving to a known spawning area where their vertical movement behaviour changed abruptly. Their occupation of shallow waters and a lack of diel vertical migrations differ markedly to the habits of oceanodromous Thunnus species. This may be due to the absence of a swim bladder and highly evolved heat exchanging vascular networks that may limit their niche breadth. The tagging data may help improve stock assessment model inputs and subsequent outcomes to guide the development of science-based conservation and management measures.
机译：近几十年来，全球Longtail金枪鱼（Thunnus Tonggol）几乎翻了一番，近期股票评估表明过度开心的股票。九个Longtail金枪鱼被追踪2-115天，澳大利亚东部的弹出卫星档案标签（27.5度为253.4度e至27.5度，153.4度e）以更好地了解他们的运动，栖息地特异性和捕获后的死亡率。鱼主要利用0-25米（最多90米）和23-28摄氏度的水温（17.1-28.5℃）的沿海水。所有鱼类均为高达654公里的距离移动，三条鱼类移动到已知的产卵区域，垂直运动行为突然发生变化。他们对浅水区的占用和缺乏DIEL垂直迁移显着不同地与OceanodroMous Thunnus种类的习惯。这可能是由于没有游泳膀胱和高度进化的热交换血管网络，这可能限制他们的利基宽度。标记数据可能有助于改善股票评估模型投入和随后的结果，以指导科学的保护和管理措施的发展。

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  • 来源
    《Marine biology》 |2020年第8期|117.1-117.12|共12页
  • 作者

    Griffiths Shane P.;

  • 作者单位

    Commonwealth Sci Ind Res Org CSIRO Oceans & Atmosphere Flagship GPO Box 2583 Brisbane Qld 4001 Australia|Interamer Trop Tuna Commiss 8901 La Jolla Shores Dr La Jolla CA 92037 USA;

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