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首页> 外文期刊>Marine ecology progress series >Artificial light disrupts the nearshore dispersal of neonate flatback turtles Natator depressus
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Artificial light disrupts the nearshore dispersal of neonate flatback turtles Natator depressus

机译：人造光干扰了新生平背海龟Natator depressus的近岸扩散

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摘要

After emerging from nests, neonate sea turtles entering the water are thought to orientate away from shore using wave cues to guide them out to sea. Artificial light may interfere with this process, but the relative importance of natural and anthropogenic cues to the dispersal of hatchlings is unknown. Here, we used acoustic telemetry to track the movement of flatback turtle Natator depressus hatchlings dispersing through nearshore waters. Turtles dispersed in the presence and absence of artificial light through a receiver array where a range of oceanographic variables were measured. Turtle tracks were analysed using a full subsets generalised additive mixed model approach to identify the most important cues influencing the bearing, variance in bearing (a measure of the ability to orientate directly), rate of travel and time spent in the array. Artificial light reduced their swim speed by up to 30%, increased the amount of time spent in nearshore waters (by 50 to 150%) and increased the variance in bearing (100 to 180% more variable), regardless of oceanographic conditions. Under ambient conditions, ocean currents affected the bearing of hatchlings as they left the shore, but when light was present, this effect was diminished, showing turtles actively swam against currents in their attempts to move towards light. After accounting for the effects of currents on hatchlings dispersing under ambient conditions, turtles swam offshore by moving perpendicular to the coastline and did not appear to orient into incident wave direction. Overall, light disrupted the dispersal of hatchlings, causing them to linger, become disoriented in the nearshore and expend energy swimming against ocean currents.
机译：从巢中浮出后，新生的海龟被认为是利用波浪线索将它们引导出海而远离海岸的。人造光可能会干扰这一过程，但尚不清楚自然和人为提示对孵化幼体的相对重要性。在这里，我们使用声学遥测技术来追踪平背海龟Natator depressus幼体散布在近岸水域中的运动。乌龟通过接收器阵列分散在有无人造光的情况下，在那里测量了一系列海洋变量。使用全子集广义加性混合模型方法对海龟轨迹进行分析，以确定影响方位，方位变化（直接定向能力的度量），行进速度和在阵列中花费的时间的最重要线索。不论海洋条件如何，人造光都会使游泳速度降低多达30％，增加了在近岸水域的停留时间（增加了50％至150％），并增加了方位变化（可变性增加了100％至180％）。在环境条件下，洋流离开孵化场时会影响孵化场的孵化，但是当有光照时，这种影响会减弱，这表明海龟积极游向水流，试图向光照移动。在考虑了水流对环境中孵化场孵化的影响之后，海龟通过垂直于海岸线移动而向海域游泳，并且似乎没有朝向入射波方向。总体而言，光线干扰了幼体的散布，使它们徘徊，在近海迷失了方向并消耗了能量来抵抗海流。

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  • 来源
    《Marine ecology progress series》 |2018年第30期|179-192|共14页
  • 作者

    Wilson Phillipa; Thums Michele; Pattiaratchi Charitha; Meekan Mark; Pendoley Kellie; Fisher Rebecca; Whiting Scott;

  • 作者单位

    Univ Western Australia, Oceans Grad Sch, 35 Stirling Highway, Crawley, WA 6009, Australia;

    Univ Western Australia M096, Australian Inst Marine Sci, Indian Ocean Marine Res Ctr, 35 Stirling Highway, Crawley, WA 6009, Australia;

    Univ Western Australia, Oceans Grad Sch, 35 Stirling Highway, Crawley, WA 6009, Australia;

    Univ Western Australia M096, Australian Inst Marine Sci, Indian Ocean Marine Res Ctr, 35 Stirling Highway, Crawley, WA 6009, Australia;

    Pendoley Environm, 12A Pitt Way, Booragoon, WA 6154, Australia;

    Univ Western Australia M096, Australian Inst Marine Sci, Indian Ocean Marine Res Ctr, 35 Stirling Highway, Crawley, WA 6009, Australia;

    Dept Biodivers Conservat & Attract, Marine Sci Program, 17 Dick Perry Ave, Kensington, WA 6151, Australia;

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  • 正文语种 eng
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  • 关键词

    Light pollution; Ocean currents; Acoustic telemetry; In-water movement; Hatchling; Vemco Positioning System;

    机译：光污染;海流;声遥测;水上运动;孵化;Vemco定位系统;

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