Nozawa K
Department of Variation Research, Primate Research Institute, Kyoto University, 484, Inuyama, Aichi, Japan.
Primates. 1972 Dec;13(4):381-93. doi: 10.1007/BF01793658.
In order to estimate the genetically effective troop size of Japanese monkeys, we have to know the pattern of distribution of the numbers of gametes contributed by the individual members of the parental population to the next generation. The author inspected the observation records of macaque troops made by a number of socio-ecologists and found that the relationship between sexual rank and sexual activity of adult males could be approximately expressed by the law of geometrical series. Assuming that the genetic contribution of male parents to the next generation was proportional to their sexual activity and that the numbers of gametes contributed by the female parents formed thePOISSON distribution, the author derived a formula for estimating effective troop size (N), namely, whereN c was the census number andN m andN f the numbers of male and female parents, respectively, of the troop. Moreover, assumingN m =0.2N c andN f =0.3N c as an average, the effective size could be estimated as 36% or less of the census number.
为了估算日本猕猴的遗传有效群体大小，我们必须了解亲代群体中个体成员对下一代贡献的配子数量的分布模式。作者查阅了多位社会生态学家对猕猴群体的观察记录，发现成年雄性的性等级与性活动之间的关系可用几何级数定律近似表示。假设雄性亲本对下一代的遗传贡献与其性活动成正比，且雌性亲本贡献的配子数量呈泊松分布，作者推导出了一个估算有效群体大小（N）的公式，即 ，其中N c 为普查数量，N m 和N f 分别为群体中雄性和雌性亲本的数量。此外，假设平均而言N m =0.2N c 且N f =0.3N c ，则有效大小可估算为普查数量的36%或更低。
