Journal
TRENDS IN ECOLOGY & EVOLUTION
Volume 15, Issue 10, Pages 421-425Publisher
ELSEVIER SCIENCE LONDON
DOI: 10.1016/S0169-5347(00)01941-8
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The assumption of costs of reproduction were a logical necessity for much of the early development of life history theory. An unfortunate property of 'logical necessities' is that it is easy to also assume that they must be true. What if this does not turn out to be the case? The existence and universality of costs of reproduction were initially challenged with empirical data of questionable value, but later with increasingly strong theoretical and empirical results. Here. we discuss Ken Spitze's 'superfleas', which represent what we consider to be the strongest empirical challenge to the universality of costs, then offer a possible explanation for their existence.
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