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首页> 外文期刊>ICES Journal of Marine Science >Why do marine endotherms eat gelatinous prey?
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Why do marine endotherms eat gelatinous prey?

机译：为什么海洋吸热会吃胶状猎物？

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There is growing evidence that gelatinous zooplanktonic organisms ("gelata") are regular prey for marine endotherms. Yet the consumption of gelata is intriguing in terms of the energy reward, because endotherms have a high energy demand and the consumption of gelata provides little energy return. In this paper, we take advantage of recent advances in diet analysis methods, notably animal-borne video loggers and DNA analysis in seabirds, to examine our current understanding of this interaction. We suggest that several hypotheses commonly raised to explain predation on gelata (including increased biomass, reduced prey availability, and secondary ingestion) have already been tested and many lack strong support. We emphasize that gelata are widely consumed by endotherms (121 cases reported across 82 species of seabirds, marine mammals, and endothermic fishes) from the Arctic to the Antarctic but noticeably less in the tropics. We propose that in line with research from terrestrial ecosystems atypical food items might be beneficial to the consumers in a non-energetic context, encompassing self-medication, and responding to homeostatic challenges. Changing the "last resort" context for a "functional response" framework may improve our understanding of widespread predation on gelata. Further biochemical analyses are needed to formally examine this perspective.
机译：越来越多的证据表明，胶质浮游动物（“ gelata”）是海洋吸热的常规猎物。然而，就能量奖励而言，明胶的消耗是令人着迷的，因为吸热具有很高的能量需求，而明胶的消耗几乎没有能量返回。在本文中，我们利用了饮食分析方法的最新进展，尤其是动物载视频记录仪和海鸟的DNA分析，来检验我们对这种相互作用的当前理解。我们建议，通常提出的几种解释来解释胶体动物的捕食（包括增加的生物量，减少的猎物可利用性和二次摄食）已经过验证，许多假设缺乏强有力的支持。我们强调，从北极到南极，吸热物质广泛吸收胶凝体（据报道，有82种海鸟，海洋哺乳动物和吸热性鱼类吸热了121例病例），而在热带地区则明显减少。我们建议，根据来自陆地生态系统的研究，非典型食品可能在非充满活力的环境中（包括自我用药并应对稳态挑战）对消费者有利。更改“功能响应”框​​架的“最后手段”上下文可能会增进我们对Gelata广泛捕食的了解。需要进行进一步的生化分析以正式检验该观点。

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