Why whales are big but not bigger: Physiological drivers and ecological limits in the age of ocean giants
Why whales are big but not bigger: Physiological drivers and ecological limits in the age of ocean giants
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DOI：
10.1126/science.aax9044
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发表时间：
2019-12-13
期刊：
影响因子：
56.9
通讯作者：
Pyenson, N. D.
中科院分区：
文献类型：
--
作者：
Goldbogen, J. A.;Cade, D. E.;Pyenson, N. D.
最大的动物是海洋滤食性动物，但其巨大体型的潜在机制仍然无法解释。我们测量了摄食性能和猎物质量，以证明如何鲸鱼armatism是由猎物丰度和收获机制，增加猎物捕获率和能量摄入的相互作用。以单一猎物为食的齿鲸的觅食效率受到大型猎物丰富度的限制，而滤食性须鲸季节性地以高效率利用大量的小型猎物。由于时间和空间聚集的猎物，过滤器喂养提供了一个进化途径，以极端的身体大小，是不提供的谱系，必须在一个猎物的时间。滤食性动物的最大尺寸可能受到空间和时间上猎物可用性的限制。
The largest animals are marine filter feeders, but the underlying mechanism of their large size remains unexplained. We measured feeding performance and prey quality to demonstrate how whale gigantism is driven by the interplay of prey abundance and harvesting mechanisms that increase prey capture rates and energy intake. The foraging efficiency of toothed whales that feed on single prey is constrained by the abundance of large prey, whereas filter-feeding baleen whales seasonally exploit vast swarms of small prey at high efficiencies. Given temporally and spatially aggregated prey, filter feeding provides an evolutionary pathway to extremes in body size that are not available to lineages that must feed on one prey at a time. Maximum size in filter feeders is likely constrained by prey availability across space and time.