Metabolism, personality and pace of life in the Trinidadian guppy, Poecilia reticulata
Brill Academic Publishers
© 2016 White, Kells, Wilson. This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International (CC-BY 4.0) License. http://creativecommons.org/licenses/by/4.0/
While among-individual variation in behaviour, or personality, is common across taxa, its mechanistic underpinnings are poorly understood. The Pace of Life syndrome (POLS) provides one possible explanation for maintenance of personality differences. POLS predicts that metabolic differences will covary with behavioural variation, with high metabolism associated with risk prone behaviour and ‘faster’ life histories (e.g., high growth, early maturation). We used a repeated measures approach, assaying metabolic traits (rate and scope), behaviour and growth to test these predictions in the Trinidadian guppy, Poecilia reticulata. We found that while individuals varied significantly in their behaviour and growth rate, more risk prone individuals did not grow significantly faster. Furthermore, after accounting for body size there was no support for among-individual variation in metabolic traits. Thus, while personality differences are clearly present in this population, they do not covary with metabolism and the POLS framework is not supported.
This is the author accepted manuscript. The final version is available from Brill Academic Publishers via the DOI in this record.
Published online June 2016