MAMMALIAN AGING, METABOLISM, AND ECOLOGY - EVIDENCE FROM THE BATS AND MARSUPIALS
MAMMALIAN AGING, METABOLISM, AND ECOLOGY - EVIDENCE FROM THE BATS AND MARSUPIALS
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DOI：
10.1093/geronj/46.2.b47
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发表时间：
1991-03-01
期刊：
影响因子：
--
通讯作者：
FISCHER, KE
中科院分区：
文献类型：
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作者：
AUSTAD, SN;FISCHER, KE
这项研究使用了580个物种的数据库，比较了蝙蝠和有袋类动物与一般哺乳动物在体型、寿命、代谢率和生态方面的变化趋势。剔除蝙蝠和有袋类动物后，哺乳动物的体重和最大寿命之间的线性对数关系被用作衡量特定哺乳动物群体寿命的标准。蝙蝠的最长寿命至少是不会飞的真兽类的3倍--这一趋势既不是因为基础代谢率低，也不是因为进入麻木的能力，也不是因为相对大脑的大小。有袋类动物的寿命约为不会飞行的真兽类动物的80%，尽管它们的基础代谢率平均较低；同样，也没有异温或相对脑大小的影响。这些结果直接与“存活率”和脑大小调节的衰老理论的预测相冲突。然而，它们与进化理论是一致的，该理论假设哺乳动物的寿命极长，环境脆弱性较小。
This study compared trends in body size, life span, metabolic rate, and ecology of bats and marsupials with those from mammals generally, using a 580 species data base. The linear logarithmic relationship between mammalian body mass and maximum longevity, deleting bats and marsupials, is used as a standard against which to measure life spans of particular mammal groups. Bats have maximum life spans a minimum of 3 times those of nonflying eutherians - a trend resulting from neither low basal metabolic rate, the ability to enter torpor, nor large relative brain size. Marsupials live about 80% as long as nonflying eutherians despite averaging lower basal metabolic rates; similarly, there is no effect of heterothermy or relative brain size. These results directly conflict with predictions of both "rate of living" and brain-size mediated theories of aging. However, they are consistent with an evolutionary theory that posits exceptionally long life spans among mammals with reduced environmental vulnerability.