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Science 20 September 2002:
Vol. 297. no. 5589, pp. 2008 - 2009
DOI: 10.1126/science.1076813

Perspectives

ECOLOGY AND EVOLUTION:
Sex Differences in Mortality Rate

Ian P. F. Owens

Why is the mortality rate higher among males than females in most mammalian species? In a Perspective, Owens discusses new findings (Moore and Wilson) showing that susceptibility to parasitic infections is greater in males than in females and may contribute to male-biased mortality.


The author is in the Department of Biological Sciences and NERC Centre for Population Biology, Imperial College London, Silwood Park, Ascot, Berkshire SL5 7PY, UK. E-mail: i.owens{at}ic.ac.uk

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Science. ISSN 0036-8075 (print), 1095-9203 (online)