Male turnover reduces population growth: An enclosure experiment on voles
Male turnover reduces population growth: An enclosure experiment on voles
复制标题
DOI：
10.1890/04-1574
复制
发表时间：
2006-01-01
期刊：
影响因子：
4.8
通讯作者：
Gundersen, G
中科院分区：
文献类型：
--
作者：
Andreassen, HP;Gundersen, G
人们认为，个人的更替会导致社会组织的破坏，进而导致繁殖和生存的减少。我们测试了雄性更替（去除常驻雄性并用不熟悉的雄性替代）如何影响实验性根田鼠（Microtus oeconomus）种群的种群表现。该治疗模拟了成年男性的捕食，随后被移民取代，并提供了对外在（即捕食）和内在（即社会组织）因素之间相互作用的深入了解。我们发现，与对照组相比，治疗群体的招募和雌性存活率急剧下降，并且繁殖开始时间稍晚。这种治疗使人口增长率几乎减半。我们怀疑招募失败是因为移民男性有杀婴行为。女性存活率的降低在女性表现出高度空间重叠的治疗人群中尤其明显。我们的实验结果表明，雄性如何显着影响种群动态，并表明捕食和社会因素如何机械地相互作用。
Turnover of individuals is assumed to cause disruptions of social organization, followed by reduced reproduction and survival. We tested how male turnover (removal of resident males and their replacement by unfamiliar males) affected population performance in experimental root vole (Microtus oeconomus) populations. The treatment simulated predation of adult males, with the subsequent replacement by immigrants, and provided insight into the interaction between extrinsic (i.e., predation) and intrinsic (i.e., social organization) factors. We showed that recruitment and female survival dramatically declined and that reproduction commenced slightly later in treatment populations compared with control populations. The treatment nearly halved the population growth rate. We suspect that recruitment failed due to infanticidal immigrating males. Reduced female survival was particularly apparent in treatment populations in which females exhibited a high degree of spatial overlap. Our experimental results show how males may significantly shape population dynamics and suggest how predation and social factors interact mechanistically.