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Intraspecific competition and coordination in the evolution of lateralization
Stockholm University, Faculty of Humanities, Centre for the Study of Cultural Evolution.
2009 (English)In: Philosophical Transactions of the Royal Society of London. Biological Sciences, ISSN 0962-8436, E-ISSN 1471-2970, Vol. 364, no 1519, 861-866 p.Article in journal (Refereed) Published
Abstract [en]

Recent studies have revealed a variety of left-right asymmetries among vertebrates and invertebrates. In many species, left-and right-lateralized individuals coexist, but in unequal numbers ('populationlevel' lateralization). It has been argued that brain lateralization increases individual efficiency (e. g. avoiding unnecessary duplication of neural circuitry and reducing interference between functions), thus counteracting the ecological disadvantages of lateral biases in behaviour (making individual behaviour more predictable to other organisms). However, individual efficiency does not require a definite proportion of left-and right-lateralized individuals. Thus, such arguments do not explain population-level lateralization. We have previously shown that, in the context of prey-predator interactions, population-level lateralization can arise as an evolutionarily stable strategy when individually asymmetrical organisms must coordinate their behaviour with that of other asymmetrical organisms. Here, we extend our model showing that populations consisting of left-and right-lateralized individuals in unequal numbers can be evolutionarily stable, based solely on strategic factors arising from the balance between antagonistic (competitive) and synergistic (cooperative) interactions.

Place, publisher, year, edition, pages
2009. Vol. 364, no 1519, 861-866 p.
Keyword [en]
asymmetry, brain evolution, brain lateralization, evolutionarily stable strategy, laterality, lateralization of behaviour
National Category
Psychology
Identifiers
URN: urn:nbn:se:su:diva-60233DOI: 10.1098/rstb.2008.0227ISI: 000264341600002OAI: oai:DiVA.org:su-60233DiVA: diva2:434483
Note
authorCount :3Available from: 2011-08-15 Created: 2011-08-11 Last updated: 2017-12-08Bibliographically approved

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Ghirlanda, Stefano
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