Abstract
Stearns (1977) suggested that in order to test the various theories of life history evolution population biologists need to collect data under controlled conditions and measure the heritabilities of life history traits. We suggest that in order to perform adequate tests of the assumptions or predictions of life history theory, investigators must perform analyses which allow them to partition the phenotypic variances and covariances of the traits observed into their components. In the case of single traits we should estimate the terms of:
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