Abstract
Personality traits overlap in behavioral syndromes that are assumed to be related to physiology and life history traits, shaping pace-of-life syndromes. Boldness and explorative behavior are frequently associated with higher parasite loads, increased resource acquisition, less efficient antipredator behavior, and reduced survival (e.g., through predation). We explored how personality is related to these biological traits using an invasive species—Atlantoxerus getulus in Fuerteventura island—as a model system with reduced parasitism and low predation pressure. We used breath rate during handling, open field tests, and escape trials to test for the existence of interindividual differences in boldness, explorative behavior, and escape speed, respectively. We also tested whether the personality traits were related and formed behavioral syndromes in A. getulus. At the same time, we explored how personality is related to ectoparasite load, body condition, and survival in the species. We found strong between-individual differences in breath rate, readiness to get in the open field arena, and escape speed. We found a behavioral syndrome, linking open field entrance and escape speed, in A. getulus. However, personality was not related to parasite load or body condition and survival was higher for bolder individuals. As a whole, our results suggest reduced parasites and predator pressures on Fuerteventura may have potentially neutralized the typical drawbacks of a fast pace-of-life in the introduced population of A. getulus.
Significance statement
Research on the interactions of animal personality with other ecological and evolutionary factors, such as parasitism and selection gradients, has yielded some intriguing perspectives about many ecological and evolutionary processes. However, our understanding of the eco-evolutionary consequences of animal personality and how it interacts with other relevant biological processes is still limited. Invasive species often experience specific ecological conditions that can allow testing of the general assumptions related to animal personality. The present contribution explores if and how personality traits are related to key ecological and evolutionary factors, such as parasitism and survival, in the context of an invasive population subjected to reduced parasite and predation pressure. Unlike other studies conducted under different ecological contexts, our results suggest Barbary ground squirrels from the assessed population with fast pace-of-life syndromes have higher survival chances than their counterparts.
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Acknowledgments
We would like to thank E. Koole and T. Dorta Morales for their help during fieldwork. We acknowledge all constructive comments regarding data analyses from R. Dorta. We are thankful to A. Martín, M. Molina Borja, and J. María Fernández-Palacios, as their comments during the master thesis of JCP have been incorporated into this manuscript. Special thanks to the Cabildo de Fuerteventura for the kindness of its staff and for providing allocation and facilities on Fuerteventura that greatly contributed to this work. Particular thanks as well to Instituto de Productos Naturales y Agrobiología (Consejo Superior de Investigaciones Científicas) and its previous director (Dr. Cosme García), by providing a vehicle to accomplish the fieldwork. The excellent reviews by two anonymous reviewers from BES contributed significantly to the improvement of the final version of this manuscript.
Funding
This study was also supported by the National Research Council of Canada, the Canadian Foundation for Innovation, and a university research grant from the University of Manitoba to JMW. AvdM was also supported by the University of Manitoba, Faculty of Science graduate studentships and the Faculty of Graduate Studies Graduate Enhancement of the Tri-Council Stipend. JCP was supported with a student grant from Ministerio de Educación, Cultura y Deporte while doing his master’s thesis. ML-D was funded by the Program Agustín de Betancourt, under the identification mark “Tenerife 2030” (P. INNOVA 2016–2021).
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All applicable international, national, and institutional guidelines for the care and use of animals were followed. All procedures were made in accordance with the American Mammal Association guidelines (Sikes et al. 2011), and were approved by the University of Manitoba’s Animal Care and Use Committee (#F14–032).
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Piquet, J.C., López-Darias, M., van der Marel, A. et al. Unraveling behavioral and pace-of-life syndromes in a reduced parasite and predation pressure context: personality and survival of the Barbary ground squirrel. Behav Ecol Sociobiol 72, 147 (2018). https://doi.org/10.1007/s00265-018-2549-8
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DOI: https://doi.org/10.1007/s00265-018-2549-8