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首页> 外文期刊>Marine ecology progress series >Novel applications of animal-borne Crittercams reveal thermocline feeding in two species of manta ray
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Novel applications of animal-borne Crittercams reveal thermocline feeding in two species of manta ray

机译：动物传播的Crittercam的新应用揭示了在两种蝠ta中的温跃层饲养

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摘要

Many marine species rely on oceanographic processes to aggregate prey sources and facilitate feeding opportunities. Numerous studies have demonstrated the importance of oceanographic fronts in the movement and foraging ecology of both predatory and filter feeding marine species. Fewer studies have investigated the importance of vertical pycnoclines (e.g. thermoclines) as foraging queues and prey aggregators. Manta rays, large batoid filter feeders, are believed to rely heavily on mesopelagic and non-surface associated zooplankton prey based on telemetry data, stomach contents, stable isotope, and fatty acid analyses. However, few direct observations exist of non-surface feeding in manta rays. We developed minimally-invasive attachment methods for animal-borne video cameras ('Crittercams') on 2 species of manta ray in Mexico and the Maldives, with the objective of capturing feeding behavior at depth. We achieved retention times of up to 4 h using an active suction attachment with a sealant in oceanic manta rays, and up to 5 h using a J-hook attachment on the upper jaw of reef manta rays. We observed feeding by both species on high-density zooplankton prey that was associated with the thermocline, suggesting that this prey aggregator may be important to the foraging ecology of both species. However, we also captured a variety of social and non-feeding behaviors that occurred within the thermocline, suggesting that telemetry-based temperature and depth data alone cannot facilitate an evaluation of the relative importance of thermocline-associated feeding. We analyzed the impact of different attachment methods on camera retention time, and discuss other relevant applications of these minimally-invasive attachment methods.
机译：许多海洋物种依靠海洋学过程来聚集猎物来源并促进觅食机会。大量研究表明，海洋学前沿在捕食性和滤食性海洋物种的移动和觅食生态中具有重要意义。很少有研究调查垂直比索线（例如温跃线）作为觅食队列和猎物聚集器的重要性。根据遥测数据，胃内容物，稳定的同位素和脂肪酸分析，蝠ta是大型蝙蝠状滤食动物，据信严重依赖于中生和非表面相关的浮游动物猎物。但是，很少有直接观察到蝠ta非表面饲养的情况。我们开发了针对墨西哥和马尔代夫2种蝠developed的动物传播摄像机（“ Crittercams”）的微创附着方法，目的是深入了解喂养行为。我们使用主动吸力附件和密封剂在大洋蝠rays中实现了长达4小时的保留时间，而在礁石蝠ta上颚上使用了J型钩附件实现了长达5小时的保留时间。我们观察到两种物种在与高温跃迁相关的高密度浮游动物猎物上觅食，这表明这种猎物聚集器可能对这两种物种的觅食生态学都很重要。但是，我们还捕获了在温跃线内发生的各种社交和非摄食行为，这表明仅基于遥测的温度和深度数据无法促进对温跃线相关摄食的相对重要性的评估。我们分析了不同附件方法对相机保留时间的影响，并讨论了这些微创附件方法的其他相关应用。

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  • 来源
    《Marine ecology progress series》 |2019年第12期|145-158|共14页
  • 作者

    Stewart Joshua D.; Smith Taylor R.; Marsha Greg; Abernathy Kyler; Fonseca-Ponce Iliana A.; Froman Niv; Stevens Guy M. W.;

  • 作者单位

    Scripps Inst Oceanog La Jolla CA 92037 USA|Manta Trust Catemwood House Norwood Lane Corscombe DT2 0NT Dorset England;

    Scripps Inst Oceanog La Jolla CA 92037 USA|Calif State Univ Long Beach Dept Biol Sci Long Beach CA 90840 USA;

    Natl Geog Remote Imaging Program Washington DC 20036 USA|Marshall Innovat LLC Alexandria VA 22307 USA;

    Natl Geog Explorat Technol Lab Washington DC 20036 USA;

    Inst Tecnol Bahia Banderas Nayarit 63734 Mexico|Inst Politecn Nacl Ctr Interdisciplinario Ciencias Marinas CICIMAR I Av IPN S-N La Paz 23096 Baja California Mexico|Proyecto Manta Pacific Mexico Circuito Santa Barbara 88 Rincon Cielo 63735 Bahia De Banderas Nayarit Mexico;

    Manta Trust Catemwood House Norwood Lane Corscombe DT2 0NT Dorset England|Univ Cambridge Dept Vet Med Cambridge CB3 0ES England;

    Manta Trust Catemwood House Norwood Lane Corscombe DT2 0NT Dorset England;

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  • 正文语种 eng
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  • 关键词

    Mobula birostris; Mobula alfredi; Mexico; Maldives; Mobulid; Feeding ecology;

    机译：ros苜蓿墨西哥;马尔代夫;Mobulid;饲养生态;

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