Volume 134(3), May 2005: 754–761.
Page 759. The first sentence of the first full paragraph should read as follows:
If we assume that the sex ratio in 1985 was at equilibrium, then the estimated sex ratio (∼2.24) represents 
(from equation 7).
Page 761. The next-to-last equation in Appendix 1 should read as follows:
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