LoboVault Home
 

Trade-off-invariant rules for evolutionarily stable life histories

LoboVault

Please use this identifier to cite or link to this item: http://hdl.handle.net/1928/1665

Trade-off-invariant rules for evolutionarily stable life histories

Show full item record

Title: Trade-off-invariant rules for evolutionarily stable life histories
Author: Charnov, Eric
Subject(s): evolutionarily stable life histories
optimization models
trade-off-invariant rules
Abstract: Optimization models have been widely and succesfully used in evolutionary ecology to predict the attributes of organisms. Most such models maximize darwinian fitness in the face of trade-offs and constraints; the numerical results usually depend on the exact form of the trade-offs or constraints. But not always : for example, earlier work predicted that the optimal range in offspring size ought to show a -1 scaling with small litter size, independent of most details of the underlying offspring-survival/offspring-size trade-off relation. Here I report that in non-growing (stationary) age-structured populations, three major life-history attributes (age at first breeding, size of an offspring in large litters, and reproductive effort) are likely to evolve to equilibrium values that satisfy a universal numerical rule; the underlying trade-off will have a slope of -1 at the optimum, independent of most other aspects of the trade-off. Each of these three attributes can be viewed as an allocation problem between just two alternatives; the trade-off is then between having more of one alternative and less of the other. The slope of the trade-off is simply the slope of the curve of allowed combinations of the two alternatives. The theory predicts that natural selection will push to an equilibrium where the slope is always -1. The economic structure is the same as that which underlies evolution of the sex ratio where the two alternatives are sons and daughters.
Date: 1997-05-22
Publisher: Nature
Citation: Charnov, E.L. 1997. Trade-off-invariant rules for evolutionarily stable life histories. Nature 387:393-394
URI: http://hdl.handle.net/1928/1665

Files in this item

Files Size Format View
nature1997.pdf 1.547Mb PDF View/Open

This item appears in the following Collection(s)

Show full item record

UNM Libraries

Search LoboVault


Advanced Search

Browse

My Account