Economos A C
Gerontology. 1980;26(2):90-8. doi: 10.1159/000212400.
Despite the highly significant correlation between brain and body weight throughout the entire mammalian class, there are consistent differences between rodents, higher primates, carnivores, and ungulates. Primates have larger brains than carnivores of equal size, while rodents have smaller brains, and ungulates have similar-sized brains as carnivores with the same body weight. Further, life span correlates well with body weight for all mammals together (over 150 species), although there are large and consistent interorder differences. For a given body weight, carnivores have a shorter life span than primates, one as long as rodent, and one longer than ungulates. These differences in life span are not matched by the differences in brain weight. Therefore, the conjecture that brain size is a determinant of life span is not valid.
尽管在整个哺乳纲中脑重与体重之间存在高度显著的相关性，但啮齿动物、高等灵长类动物、食肉动物和有蹄类动物之间存在持续的差异。同等体型的灵长类动物比食肉动物的大脑更大，而啮齿动物的大脑较小，相同体重的有蹄类动物与食肉动物的大脑大小相似。此外，所有哺乳动物（超过150种）的寿命与体重密切相关，尽管存在较大且持续的目间差异。对于给定的体重，食肉动物的寿命比灵长类动物短，与啮齿动物的寿命一样长，比有蹄类动物的寿命长。这些寿命上的差异与脑重的差异并不匹配。因此，脑容量是寿命决定因素的推测是无效的。
