Chacon-Puignau G C, Jaffe K
Department de Ciencia y Technologia del Comportamiento, Universidad Simon Bolivar, Miranda, Venezuela.
Soc Biol. 1996 Fall-Winter;43(3-4):257-70. doi: 10.1080/19485565.1996.9988927.
This study evaluates the impact of the Trivers-Willard (T-W) effect on human populations, using demographic data collected from vital registration data in Venezuela. The evaluation of the sex ratio at birth (SRB) and of fetal and infant deaths supports the existence of T-W effect in the Venezuelan population in extreme conditions. This T-W effect was observable in the SRB but not at later ages and is related to the marital status of the mother. The results indicate that the investment in females associated with environmental adversity is greater than the investment in males associated with good environmental conditions.
本研究利用从委内瑞拉人口动态登记数据中收集的人口统计数据，评估特里弗斯-威拉德（T-W）效应 对人类群体的影响。对出生性别比（SRB）以及胎儿和婴儿死亡情况的评估支持了在极端条件下委内瑞拉人群中存在T-W效应。这种T-W效应在出生性别比中是可观察到的，但在 later ages 则不然，并且与母亲的婚姻状况有关。结果表明，与环境逆境相关的对女性的投入大于与良好环境条件相关的对男性的投入。
