Biology and Philosophy 15 (1):1-17 (2000)

James Griesemer
University of California, Davis
In a previous study, using experimental metapopulations of the flour beetle, Tribolium castaneum, we investigated phase III of Wright's shifting balance process (Wade and Griesemer 1998). We experimentally modeled migration of varying amounts from demes of high mean fitness into demes of lower mean fitness (as in Wright's characterization of phase III) as well as the reciprocal (the opposite of phase III). We estimated the meta-populational heritability for this level of selection by regression of offspring deme means on the weighted parental deme means.Here we develop a Punnett Square representation of the inheritance of the group mean to place our empirical findings in a conceptual context similar to Mendelian inheritance of individual traits. The comparison of Punnett Squares for individual and group inheritance shows how the latter concept can be rigorously defined and extended despite the lack of explicitly formulated, simple Mendelian laws of inheritance at the group level. Whereas Wright's phase III combines both interdemic selection and meta-populational inheritance, our formulation separates the issue of meta-populational heritability from that of interdemic selection. We use this conceptual context to discuss the controversies over the levels of selection and the units of inheritance.
Keywords levels of selection  metapopulations  populational heritability  Punnett Squares  shifting balance theory  units of inheritance
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DOI 10.1023/A:1006501313374
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References found in this work BETA

The Major Transitions in Evolution.John Maynard Smith & Eors Szathmary - 1996 - Journal of the History of Biology 29 (1):151-152.
Individuality and Selection.David L. Hull - 1980 - Annual Review of Ecology and Systematics 11:311-332.
Units of Evolution: A Metaphysical Essay.David L. Hull - 1981 - In Uffe Juul Jensen & Rom Harré (eds.), The Philosophy of Evolution. St. Martin's Press. pp. 23--44.

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Citations of this work BETA

Units and Levels of Selection.Elisabeth Lloyd - 2008 - Stanford Encyclopedia of Philosophy.
Scaffolding Natural Selection.Walter Veit - 2022 - Biological Theory 17 (2):163-180.

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