The cultural transmission of acquired variation

Effects on genetic fitness

Robert Boyd, Peter J. Richerson

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

In a cultural species individuals acquire some aspects of their phenotypes by imitating conspecifics. Presumably, cultural transmission has some adaptive function in such species. Some authors have suggested that one such function may be the ability to transmit phenotypes that have been modified by learning or some other form of phenotypic plasticity. To examine this hypothesis we have compared the genetic fitness of cultural and noncultural individuals in three different models. In each model the environment is assumed to be variable, either in space or time, and learning modifies each individual's phenotype so as to increase the individual's fitness in the local environment. Cultural individuals transmit the modified phenotype to their offspring, while noncultural individuals do not. The models are different in the following ways: two models assume a dichotomous phenotype, one in a temporally varing environment and one in a spatially varying environment; the third model assumes a quantitative phenotype in a temporally variable environment. The two models which assume a temporally varying environment yield similar results. Genetic transmission is favored in highly autocorrelated environments while cultural transmission in environments with intermediate autocorrelation. In the spatially varying model cultural transmission is always favored.

Original languageEnglish (US)
Pages (from-to)567-596
Number of pages30
JournalJournal of Theoretical Biology
Volume100
Issue number4
DOIs
StatePublished - Feb 21 1983
Externally publishedYes

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Genetic Fitness
Fitness
Phenotype
phenotype
Varying Environment
Model
learning
cultural environment
Learning
Aptitude
reproductive fitness
phenotypic plasticity
autocorrelation
Autocorrelation
Plasticity

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)

Cite this

The cultural transmission of acquired variation : Effects on genetic fitness. / Boyd, Robert; Richerson, Peter J.

In: Journal of Theoretical Biology, Vol. 100, No. 4, 21.02.1983, p. 567-596.

Research output: Contribution to journalArticle

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