摘要：Fluctuations in the mean annual ambient temperature have been associated with temporal changes in the proportion of males in total human births. Our aim was to test if changes in mean annual ambient temperature have influenced regional variation in the proportion of males born in New Zealand from 1961 to 2009. We used time-series analyses to test for positive relationships between current or lagged mean annual ambient temperature and the proportion of male births within 13 regions. Only two regions showed a significant effect of either current year or lagged temperature on the proportion of males born, with each showing a decreasing male-bias with temperature (contrary to our hypothesis). Additionally, a meta-analysis revealed that the standardized effect size of temperature on the proportion of male births across regions was negative for both current and previous years, but was not statistically significant. These findings did not support the hypothesis that mean annual ambient temperature affects the proportion of males born.
关键词：meta-analysis; sex allocation; sex ratio; time series analysis
