Metabolic temperature compensation and coevolution of locomotory performance in pteropod molluscs.
Metabolic temperature compensation and coevolution of locomotory performance in pteropod molluscs.
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DOI：
10.1093/icb/icm089
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发表时间：
2007-12
影响因子：
2.6
通讯作者：
B. Seibel;A. Dymowska;J. Rosenthal
中科院分区：
文献类型：
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作者：
B. Seibel;A. Dymowska;J. Rosenthal
裸体翼足类是一种高度特化的食肉动物，专门以其膜体亲属为食。摄食行为和裸体摄食结构的形态是多样的，并与壳的大小，形状和一致性相一致。在这里，我们表明，裸体的代谢能力和运动行为是同样多样的，并与它们的猎物。裸体和囊体的范围从凝胶状的静坐等待形式到具有高性能运动肌肉的活跃捕食者。我们发现超过10倍的变化，大小调整和温度调整代谢率内的Gymnosomata和Thecosomata和捕食者和猎物的代谢率之间的强相关性。此外，这些特征强烈地受到环境参数的影响，捕食者和猎物在相似的选择下收敛于相似的生理能力。例如，在寒冷的沃茨中运动能力的补偿导致极地物种代谢率的提高。这个高度共同进化的系统中讨论的捕食者-猎物的“军备竞赛”和即将失去的捕食者和猎物的大气中的二氧化碳含量升高的威胁，通过海洋酸化溶解猎物壳。
Gymnosomatous pteropods are highly specialized planktonic predators that feed exclusively on their thecosomatous relatives. Feeding behavior and the morphology of gymnosome feeding structures are diverse and have evolved in concert with the size, shape, and consistency of the thecosome shell. Here, we show that the metabolic capacity and locomotory behaviors of gymnosomes are similarly diverse and vary with those of their prey. Both gymnosomes and thecosomes range from gelatinous sit-and-wait forms to active predators with high-performance locomotory muscles. We find more than 10-fold variation in size-adjusted and temperature-adjusted metabolic rates within both the Gymnosomata and Thecosomata and a strong correlation between the metabolic rates of predators and of prey. Furthermore, these characteristics are strongly influenced by environmental parameters and predator and prey converge upon similar physiological capacities under similar selection. For example, compensation of locomotory capacity in cold waters leads to elevated metabolic rates in polar species. This highly coevolved system is discussed in terms of a predator-prey "arms race" and the impending loss of both predator and prey as elevated atmospheric carbon dioxide levels threaten to dissolve prey shells via oceanic acidification.