Journal
JOURNAL OF EVOLUTIONARY BIOLOGY
Volume 23, Issue 4, Pages 748-756Publisher
WILEY
DOI: 10.1111/j.1420-9101.2010.01940.x
Keywords
animal personality; correlated evolution; geographical variation; line of least resistance; trade-off
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Funding
- National Science Foundation [0235311]
- University of Tennessee Ecology and Evolutionary Biology Department
- Ministerio del Ambiente of Ecuador [013-2008-IC-FAU-DRFP/MA]
- Escuela de Ciencias Biologicas
- Pontificia Universidad Catolica del Ecuador
- Division Of Integrative Organismal Systems
- Direct For Biological Sciences [0235311] Funding Source: National Science Foundation
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Correlations in behavioural traits across time, situation and ecological context (i.e. 'behavioural syndromes' or 'personality') have been documented for a variety of behaviours, and in diverse taxa. Perhaps the most controversial inference from the behavioural syndromes literature is that correlated behaviour may act as an evolutionary constraint and evolutionary change in one's behaviour may necessarily involve shifts in others. We test the two predictions of this hypothesis using comparative data from eighteen populations of the socially polymorphic spider, Anelosimus studiosus (Araneae, Theriidae). First, we ask whether geographically distant populations share a common syndrome. Second, we test whether population differences in behaviour are correlated similarly to within-population trait correlations. Our results reveal that populations separated by as much as 36 degrees latitude shared similar syndromes. Furthermore, population differences in behaviour were correlated in the same manner as within-population trait correlations. That is, population divergence tended to be along the same axes as within-population covariance. Together, these results suggest a lack of evolutionary independence in the syndrome's constituent traits.
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