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Selection for Optimal Life Histories. II: Multiple Equilibria and the Evolution of Alternative Reproductive Strategies
Author(s) -
Schaffer William M.,
Rosenzweig Michael L.
Publication year - 1977
Publication title -
ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.144
H-Index - 294
eISSN - 1939-9170
pISSN - 0012-9658
DOI - 10.2307/1935108
Subject(s) - semelparity and iteroparity , adaptation (eye) , selection (genetic algorithm) , fitness landscape , biology , ecology , reproductive success , life history , local adaptation , life history theory , set (abstract data type) , longevity , variation (astronomy) , evolutionary biology , argument (complex analysis) , demography , sociology , computer science , population , artificial intelligence , biochemistry , genetics , physics , neuroscience , astrophysics , programming language
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.