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SEX RATIO IN THE AUSTRALIAN CAPITAL TERRITORY

W. R. LYSTER
Human Biology
Vol. 42, No. 4 (December 1970), pp. 670-678
Stable URL: http://www.jstor.org/stable/41462257
Page Count: 9
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SEX RATIO IN THE AUSTRALIAN CAPITAL TERRITORY
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Abstract

The significant association between rainfall and sex ratio which has already been established in respect of the cities of Perth, Adelaide, Brisbane and Sydney appears to exist in Canberra also, where the management of the water supply has served to exaggerate the influence of rainfall. Seasonal fluctuations in the sex ratio of live births taking place in Canberra are of sufficient magnitude to allow it to be perceived that approximately the same number of female births take place in each of the twelve calendar months, and that changes in the sex ratio are brought about by seasonally variable numbers of male births. The statistical evidence relating to this particular aspect of the sex ratio is, however, not watertight, and will need to be further tested when future data are born.

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