当前位置: X-MOL 学术Mamm. Res. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Longevity in a hunted population of reintroduced American bison ( Bison bison )
Mammal Research ( IF 1.3 ) Pub Date : 2020-10-08 , DOI: 10.1007/s13364-020-00540-9
Thomas S. Jung

Mean and maximum longevity (i.e., age-at-death) in free-ranging American bison (Bison bison) subject to natural selection is difficult to estimate in the wild; hence, data on age-at-death for free-ranging populations is sparse. I used a 20-year time series of age-at-death data from 1909 bison to estimate mean longevity of hunter-killed bison in a growing population. I tested the following predictions: (a) mean longevity of hunted females was greater than males, (b) mean longevity for hunted animals was less than those dying from natural causes, and (c) longevity did not respond to increasing population size (i.e., density independence). In support of my prediction, mean age-at-death of females (6.3 ± 3.8 (SD) years old) was greater than that for males (5.3 ± 2.7 years old); however, the difference was only 1 year. Most bison (45%) died as mature adults (4–7 years old), and few lived to become dominant or aged adults, which may have important implications for social ecology or population dynamics. Maximum longevity (i.e., oldest age-at-death) was 22 and 25 years old for males and females, respectively. The mean age-at-death of hunted females was 1.4 years younger than a small sample that died of natural causes. Contrary to my prediction, longevity increased slightly for females, but not males, with an increase in abundance. These data may be useful for better understanding bison demography and life history strategies, as well as parameterizing population models, particularly for hunted populations. Similar data from unhunted populations subject to natural selection would be informative to test the generality of these findings.



中文翻译:

在重新引入的美洲野牛(Bison野牛)的狩猎种群中长寿

自由放养的美洲野牛(野牛野牛)的平均寿命和最大寿命(即死亡年龄))在自然条件下很难进行自然选择;因此,自由放养人群的死亡年龄数据很少。我使用了1909年野牛死亡时的20年时间序列数据,以估计在不断增长的人口中被猎杀的野牛的平均寿命。我测试了以下预测:(a)被猎杀的雌性的平均寿命大于雄性,(b)被捕猎的动物的平均寿命小于因自然原因而死的动物,以及(c)长寿对种群数量的增长没有反应(即,密度独立)。为了支持我的预测,女性的平均死亡年龄(6.3±3.8(SD)岁)大于男性的平均死亡年龄(5.3±2.7岁);但是,相差只有1年。大多数野牛(45%)死于成年成年人(4-7岁),而很少有成为优势或成年成年人的人活着,这可能会对社会生态或人口动态产生重要影响。男性和女性的最大寿命(即最老的死亡年龄)分别为22岁和25岁。被捕女性的平均死亡年龄比死于自然原因的一小样本小1.4岁。与我的预测相反,女性的寿命略有增加,但是男性却没有,寿命增加了。这些数据可能有助于更好地了解野牛人口统计学和生活史策略,以及参数化种群模型,特别是对于被猎杀的种群。未经筛选的自然选择种群的相似数据将有助于检验这些发现的普遍性。最高死亡年龄分别为22岁和25岁,男性和女性。被捕女性的平均死亡年龄比死于自然原因的一小样本小1.4岁。与我的预测相反,女性的寿命略有增加,但是男性却没有,寿命增加了。这些数据可能有助于更好地了解野牛人口统计学和生活史策略,以及参数化种群模型,特别是对于被猎杀的种群。未经筛选的自然选择种群的相似数据将有助于检验这些发现的普遍性。男性的最大死亡年龄分别为22岁和25岁。被捕女性的平均死亡年龄比死于自然原因的一小样本小1.4岁。与我的预测相反,女性的寿命略有增加,但是男性却没有,寿命增加了。这些数据可能有助于更好地了解野牛人口统计学和生活史策略,以及参数化种群模型,特别是对于被猎杀的种群。未经筛选的自然选择种群的类似数据将有助于检验这些发现的普遍性。丰度增加。这些数据可能有助于更好地了解野牛人口统计学和生活史策略,以及参数化种群模型,特别是对于被猎杀的种群。未经筛选的自然选择种群的相似数据将有助于检验这些发现的普遍性。丰度增加。这些数据可能有助于更好地了解野牛人口统计学和生活史策略,以及参数化种群模型,特别是对于被猎杀的种群。未经筛选的自然选择种群的相似数据将有助于检验这些发现的普遍性。

更新日期:2020-10-08
down
wechat
bug