Endocranial volume is heritable and is associated with longevity and fitness in a wild mammal.

Endocranial volume is heritable and is associated with longevity and fitness in a wild mammal.
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DOI:
10.1098/rsos.160622
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发表时间:
2016-12
影响因子:
3.5
通讯作者:
Clutton-Brock TH
Clutton-Brock TH
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Logan CJ;Kruuk LE;Stanley R;Thompson AM;Clutton-Brock TH

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对哺乳动物大脑相对大小的研究表明,大脑大小的增加可能会对生存产生好处,对繁殖力产生影响:对哺乳动物的比较研究表明,相对大脑大小的种间差异与寿命呈正相关,与繁殖力呈负相关。然而,到目前为止,还没有对哺乳动物的研究调查过物种之间是否存在类似的关系,也没有调查过野生种群中大脑大小的个体差异是否是可遗传的。在这里,我们表明,在一个野生种群的红鹿(马鹿),相对颅内体积是可遗传的(h2 = 63%; 95%可信区间(CI)= 50-76%)。在女性中,它与寿命和终生生殖成功呈正相关,尽管没有证据表明它与生育力有关。在男性中,颅内容积与寿命、终生繁殖成功率或生育力无关。
Research on relative brain size in mammals suggests that increases in brain size may generate benefits to survival and costs to fecundity: comparative studies of mammals have shown that interspecific differences in relative brain size are positively correlated with longevity and negatively with fecundity. However, as yet, no studies of mammals have investigated whether similar relationships exist within species, nor whether individual differences in brain size within a wild population are heritable. Here we show that, in a wild population of red deer (Cervus elaphus), relative endocranial volume was heritable (h2 = 63%; 95% credible intervals (CI) = 50–76%). In females, it was positively correlated with longevity and lifetime reproductive success, though there was no evidence that it was associated with fecundity. In males, endocranial volume was not related to longevity, lifetime breeding success or fecundity.
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发表时间: 2013-08
影响因子: 2.6
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