Abstract
In a recent theoretical study of life history evolution, it was suggested that, for some species, there might exist more than one set of age—specific reproductive expenditures corresponding to local maxima in fitness. The present paper points out that the argument supporting this conclusion was in error, but that the conclusion itself is correct. In addition, the suggestion that the same adaptive landscape can obtain local optima corresponding to both semelparity and iteroparity is confirmed. The circumstances under which variation in reproductive efforts should be canalized are also discussed.
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