一项研究显示,人类与大猩猩、猴子和狒狒等其他灵长类动物衰老模式并无太大区别。
艾奥瓦州立大学学者安妮·布罗尼科夫斯基领导研究团队,在数十年时间内收集除人类外灵长类动物的衰老信息,与现代美国人比对。
衰老意味着,随着年龄的增长,个体死于自然因素的风险增加。一些专家先前认为,人类较其他哺乳动物寿命更长,可能具备独特衰老模式。
美联社记者19日援引布罗尼科夫斯基的话报道,研究团队相信,现代人与其他灵长类动物衰老模式可能小有不同,但“我们没有发现令人信服的不同点”。
研究人员发现,人类和其他大部分灵长类一样,幼年期死亡率较高,青少年死亡率低,随着年龄增长死亡率再次升高。另外,女性或者雌性比男性或者雄性平均寿命更长。
就灵长类而言,唯一的例外是生活在巴西的绒毛蛛猴。这一物种的雌性和雄性平均寿命几乎一样。与其他灵长类动物不同,雄性绒毛蛛猴向雌性“示爱”时并不相互竞争,而是相互合作。
研究人员说,其他灵长类动物中雄性寿命短于雌性可能正是缘自竞争的压力。(生物谷Bioon.com)
生物谷推荐原始出处:
Science DOI: 10.1126/science.1201571
Aging in the Natural World: Comparative Data Reveal Similar Mortality Patterns Across Primates
Anne M. Bronikowski1, Jeanne Altmann2,3, Diane K. Brockman4, Marina Cords5, Linda M. Fedigan6, Anne Pusey7, Tara Stoinski8, William F. Morris9, Karen B. Strier10, and Susan C. Alberts3,9,*
Abstract
Human senescence patterns—late onset of mortality increase, slow mortality acceleration, and exceptional longevity—are often described as unique in the animal world. Using an individual-based data set from longitudinal studies of wild populations of seven primate species, we show that contrary to assumptions of human uniqueness, human senescence falls within the primate continuum of aging; the tendency for males to have shorter life spans and higher age-specific mortality than females throughout much of adulthood is a common feature in many, but not all, primates; and the aging profiles of primate species do not reflect phylogenetic position. These findings suggest that mortality patterns in primates are shaped by local selective forces rather than phylogenetic history.