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首页> 外文期刊>Marine ecology progress series >Hidden predators on coral reefs: muricid consumption of vermetids
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Hidden predators on coral reefs: muricid consumption of vermetids

机译：隐藏在珊瑚礁上的捕食者：食用ric虫素

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摘要

Predators, through their effects on prey densities, sizes, and behaviors, can shape ecological communities. Thus, quantitative assessments of predator-prey relationships are key to understanding these effects. Here, we documented the patterns and processes underlying the effects of 2 predatory muricid gastropods, Mancinella armigera and Menathais tuberosa, on the sessile vermetid gastropod Ceraesignum maximum. We used a combination of field surveys and manipulative lab and field experiments to quantify muricid abundances, predator feeding rates, and effects of predator density on vermetid mortality. The 2 predators exhibited spatial segregation, with M. armigera being more common close to the reef crest and M. tuberosa increasing in density away from and shoreward of the reef crest. We demonstrated that recently killed vermetids were more common in the vicinity of M. armigera. Laboratory assays revealed that M. armigera killed 0.55 C. maximum predator(-1) d(-1), a rate that was similar to 60% greater than for M. tuberosa. Although the 2 predators were spatially segregated in the field, they did not demonstrate interference competition or intraguild predation in the lab. Consumption rates of C. maximum by M. armigera in the field were approximately equal to those quantified in the lab, and although consumption rates decreased over time, predator density had no effect on predator consumption rate. In addition, we observed no evidence of size selectivity by predators. This study is the first to quantitatively examine predator-prey interactions involving C. maximum, and our findings suggests that muricids can limit vermetid populations where both are present.
机译：捕食者通过影响猎物的密度，大小和行为，可以塑造生态群落。因此，对捕食者与被捕食者之间的关系进行定量评估是了解这些影响的关键。在这里，我们记录了模式和过程潜在的影响2无休止的腹足类腹足类Ceraesignum最大值的捕食性杀蝇ric腹足类的影响。我们结合野外调查，操纵性实验室和野外实验来量化毒株的丰度，捕食者的进食速度以及捕食者密度对线虫死亡率的影响。这两种捕食者表现出空间隔离，其中棉铃虫更常见于礁顶，而结核分枝杆菌在远离礁顶和向岸上时密度增加。我们证明，最近被杀死的Vermetids在棉铃虫附近更为常见。实验室分析表明，棉铃虫杀死了0.55 C.的最大捕食者（-1）d（-1），这一比率比结核分枝杆菌的杀伤力大60％。尽管这两种捕食者在野外在空间上是隔离的，但它们在实验室中并未表现出干扰竞争或行会内捕食。棉铃虫在野外的最大消费率与实验室中定量的消费率大致相等，尽管消费率随时间降低，但捕食者的密度对捕食者的消费率没有影响。此外，我们没有观察到捕食者对大小有选择性的证据。这项研究是第一个定量研究涉及最大梭菌的捕食者与猎物之间相互作用的研究，我们的研究结果表明，杀虫剂可以限制同时存在两者的准种群。

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  • 来源
    《Marine ecology progress series》 |2019年第18期|121-131|共11页
  • 作者

    Brown A. L.; Frazer T. K.; Li G.; Hilsenroth J. R.; Shima J. S.; Osenberg C. W.;

  • 作者单位

    Univ Georgia Odum Sch Ecol Athens GA 30602 USA|Univ Florida Sch Nat Resource & Environm Gainesville FL 32611 USA;

    Univ Florida Sch Nat Resource & Environm Gainesville FL 32611 USA|Univ Florida Sch Forest Resources & Conservat Fisheries & Aquat Sci Program Gainesville FL 32611 USA;

    UC Berkeley Richard B Gump Marine Stn BP 244 F-98728 Moorea French Polynesi France;

    Univ Florida Sch Nat Resource & Environm Gainesville FL 32611 USA;

    Victoria Univ Wellington Sch Biol Sci Wellington 6140 New Zealand;

    Univ Georgia Odum Sch Ecol Athens GA 30602 USA;

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  • 正文语种 eng
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  • 关键词

    Predation; Ceraesignum maximum; Multiple predator effects; Coral reefs;

    机译：捕食麦角最大;多种掠食者效应;珊瑚礁;

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