sex ratio

(redirected from Unbalanced sex ratio)
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sex ratio

[′seks ‚rā·shō]
(biology)
The relative proportion of males and females in a population.
References in periodicals archive ?
(1) In fact, many countries, including Singapore, India, Vietnam, Korea, and Taiwan, also have exhibited unbalanced sex ratios in the premarital age cohorts.
Such imbalances may be caused by selective migration (as in the Gulf States), by past unbalanced sex ratios at birth (as in China), or by excess mortality of either men or women (as in France after World War 1).
Of the possible interventions that might disrupt these synergies and prevent any population-level consequences being established, we suggest four options: regulation of sex identification through ultrasound; prohibition of sex selective abortion; addressing gender equity, including educating the population about the negative consequences of an unbalanced sex ratio and promoting the role of girls and women in family and society; and relaxing the one-to-two child family policy by opting for the policy that each family should remain small in the new Law on Population.
In fact, the Raleigh-Durham area had the most unbalanced sex ratio among foreign-born Hispanics of any metropolitan area in the United States in 2000, (16) with 2.3 men aged 20-29 for every like-aged woman.
Simulations have shown a weak impact of bull harvest on the dynamics of moose populations, provided that an unbalanced sex ratio does not cause a decrease in the productivity of cows (Michel et al.
In gender terms, mining presented nineteenth century society with a highly unbalanced sex ratio, so it is not surprising that women appear among the most pessimistic critics of the diggings.
The higher drug consumption by women in the young adult population[13, 21] could explain the unbalanced sex ratio, whereas no higher drug consumption by women has been established clearly in the elderly population[14, 21].
Oomman and Ganatra are worried that preconception sex selection will cause an unbalanced sex ratio. In reality, preconception sex selection will allow couples to balance the sex ratio in their own families (1).