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首页> 外文期刊>Marine ecology progress series >Vertical movements of shortfin mako sharks Isurus oxyrinchus in the western North Atlantic Ocean are strongly influenced by temperature
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Vertical movements of shortfin mako sharks Isurus oxyrinchus in the western North Atlantic Ocean are strongly influenced by temperature

机译：短鳍ma鲨在北大西洋西部的垂直运动受到温度的强烈影响

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摘要

Although shortfin mako sharks Isurus oxyrinchus are regularly encountered in pelagic fisheries, limited information is available on their vertical distribution and is primarily restricted to cooler areas of their geographic range. We investigated the vertical movements of mako sharks across differing temperature regimes within the western North Atlantic by tagging 8 individuals with pop-up satellite archival tags off the northeastern United States and the Yucatan Peninsula, Mexico. Depth and temperature records across 587 d showed vertical movements strongly associated with ocean temperature. Temperatures <15 degrees C created a lower depth limit to most diving behaviors, and shifts in depths used coincided with changes in the thermal properties of the vertical habitat. In the warmest water columns, sharks spent 36% of the daytime at depths >150 m compared to only 1% in the coldest water columns. The sharks showed diel diving behavior, with deeper dives occurring primarily during the daytime (maximum depth: 866 m). Overall, sharks experienced temperatures between 5.2 and 31.1 degrees C. When the opportunity was available, sharks spent considerable time in waters ranging from 22 to 27 degrees C, indicating underestimation of the previously reported upper limit of the mako sharks' preferred temperature. The preference for higher temperatures does not support endothermy as an adaption for niche expansion in mako sharks. The strong influence of thermal habitat on movement behavior suggests potentially strong impacts of rising ocean temperatures on the ecology of this highly migratory top predator.
机译：尽管在中上层渔业中经常遇到短鳍鲨，但有关垂直分布的信息有限，主要限于其地理范围较凉的地区。我们通过在美国东北部和墨西哥尤卡坦半岛附近的弹出式卫星档案标签中标记了8个人，调查了北大西洋西部西部不同温度范围内玛科鲨的垂直运动。 587 d的深度和温度记录显示垂直运动与海洋温度密切相关。温度低于15摄氏度时，大多数潜水行为的深度均受到了限制，并且所用深度的变化与垂直栖息地的热力特性发生了变化。在最温暖的水域中，鲨鱼白天在> 150 m的深度上花费了36％的时间，而在最冷的水域中仅花费了1％的时间。鲨鱼表现出迪尔跳水的行为，更深的跳水主要发生在白天（最大深度：866 m）。总体而言，鲨鱼的温度在5.2至31.1摄氏度之间。如果有机会，鲨鱼会在22至27摄氏度的水域中度过相当长的时间，这表明低估了先前报道的玛科鲨鱼的首选温度上限。对较高温度的偏爱并不支持吸热，因为吸热不能适应鲨鱼鲨鱼的小生境扩展。热栖息地对运动行为的强烈影响表明，海洋温度升高对该高度迁徙的顶级捕食者的生态可能产生强烈影响。

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  • 来源
    《Marine ecology progress series》 |2016年第7期|163-175|共13页
  • 作者

    Vaudo Jeremy J.; Wetherbee Bradley M.; Wood Anthony D.; Weng Kevin; Howey-Jordan Lucy A.; Harvey Guy M.; Shivji Mahmood S.;

  • 作者单位

    Nova SE Univ, Guy Harvey Res Inst, Dania, FL 33004 USA|Nova SE Univ, Save Our Seas Shark Res Ctr, Dania, FL 33004 USA;

    Nova SE Univ, Guy Harvey Res Inst, Dania, FL 33004 USA|Univ Rhode Isl, Dept Biol Sci, Kingston, RI 02881 USA;

    Univ Rhode Isl, Grad Sch Oceanog, Kingston, RI 02881 USA;

    Coll William & Mary, Fisheries Sci, Virginia Inst Marine Sci, Gloucester Point, VA 23062 USA;

    Nova SE Univ, Guy Harvey Res Inst, Dania, FL 33004 USA;

    Nova SE Univ, Guy Harvey Res Inst, Dania, FL 33004 USA;

    Nova SE Univ, Guy Harvey Res Inst, Dania, FL 33004 USA|Nova SE Univ, Save Our Seas Shark Res Ctr, Dania, FL 33004 USA;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Habitat use; Satellite tracking; Dive behavior; Telemetry;

    机译：栖息地使用;卫星跟踪;潜水行为;遥测;

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