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原文連結
論文資訊
- 類型：已發表論文
- 日期：2011
摘要
Over many millions of years of independent 演化, placental, marsupial and monotreme mammals have diverged conspicuously in physiology, life history and reproductive 生態學. The differences in life histories are particularly striking. Compared with placentals, marsupials exhibit shorter pregnancy, smaller size of offspring at birth and longer period of lactation in the pouch. Monotremes also exhibit short pregnancy, but incubate embryos in eggs, followed by a long period of post-hatching lactation. Using a large sample of mammalian 物種, we show that, remarkably, despite their very different life histories, the 縮放律 of production rates is 統計ly indistinguishable across mammalian lineages. Apparently all mammals are subject to the same fundamental metabolic constraints on productivity, because they s
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