By Hugh Dingle, Joseph P. Hegmann

This quantity is the results of a symposium entitled "Variation in lifestyles Histories: Genetics and Evolutionary procedures" backed by means of this system in Evolutionary Ecology and behaviour of the college of Iowa and held in Iowa urban on October thirteen and 14, 1980. brought on via a contemporary upsurge of curiosity within the evolution of lifestyles histories, we selected this subject as a result of seen organization among lifestyles background features and Darwinian healthy­ ness. If such an organization have been to be fruitfully investigated, it is going to require the nearer cooperation of inhabitants and evolutionary ecologists and quantitative and inhabitants geneticists. To motivate such an organization, our symposium had 4 significant goals: first, to facilitate highbrow trade throughout disciplines between an array of biologists learning existence histories; moment, to motivate exploration of genetic variance and covari­ ance for all times heritage characteristics; 3rd, to think about the ecological heritage for genetic vari­ skill; and at last, to facilitate a comparative assessment either inside of and between species. evidently such vast goals can't be met absolutely in one quantity, yet we predict now we have succeeded quite good in offering a consultant and nourishing intel­ lectual dinner party. We see this ebook as a stimulus to the coordination of destiny efforts in an enormous and increasing sector of inquiry. we've divided the e-book into six sections.

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Extra resources for Evolution and Genetics of Life Histories

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38,184-188 (1979). Simpson, G. : The Major Features of Evolution. New York: Columbia University Press, 1953 . Stearns, S. : The evolution of life history traits: A critique of the theory and a review of the data. Ann. Rev. Ecol. Syst. 8,145-171 (1977). Williams, G. : Pleiotropy, natural selection, and the evolution of senescence. Evolution 11,398-411 (1957). : The roles of mutation, inbreeding, crossbreeding and selection in evolution. Proc. Sixth Inti. Congress Genet. 1, 356-366 (1932). : The analysis of variance and the correlations between relatives with respect to deviations from an optimum.

Estimates of physiological variance using the first two methods are shown in Table 3-2 (adapted from Bradley 1979). In every instance physiological variance was greater in females than in males. Females also acclimated more than males when exposed to elevated temperatures for varying periods, such acclimation occurring in as little as 3 hr (Bradley 1978b). Table 3-2. 0 1. 0 2. 2 a Adapted from Bradley (1979). bEstimate I was from half and full sibling analyses, estimates 2 and 3 from full sibling analyses, and estimate 4 from offspring-parent regression analysis (see Table 3-3).

Table 3-2. 0 1. 0 2. 2 a Adapted from Bradley (1979). bEstimate I was from half and full sibling analyses, estimates 2 and 3 from full sibling analyses, and estimate 4 from offspring-parent regression analysis (see Table 3-3). aFram Bradley (1978a, 1979). E. calculated according to Falconer (1960). No. of families 19 19 No. 45 Full siblings Expt. 3 Table 3-3. 26 Offspring-parent regression Expt. =O 00 Models for Physiological and Genetic Adaptation 39 Estimates of additive genetic variance, expressed as fractions of phenotypic variance or heritabilities are shown in Table 3-3, as are the phenotypic variances.

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