Abstract
The influence of landscape structure and host diet on parasite load of wildlife is still largely unknown. We studied a roe deer (Capreolus capreolus) population in a fragmented agricultural landscape in southern France to explore the relationship of gastrointestinal nematode load with spleen mass (to index immunocompetence), faecal nitrogen (to index diet quality), landscape structure and age of 33 hunt-harvested roe deer. Gastrointestinal worm counts were negatively related to faecal nitrogen and spleen mass, explaining respectively 24.7% and 9.2% of the observed variability in parasite load. Landscape structure did not appear to have a direct influence on gastrointestinal worm counts, but since animals from more open areas have a diet that is richer in nitrogen, its influence may be indirect. In conclusion, in the study area, the colonisation of the agricultural landscape does not seem to have increased the risk of gastrointestinal nematode parasitism for roe deer, possibly because access to high-quality food enhances immunocompetence.
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Acknowledgements
We would like to thank J.P. Chanal and the local hunting associations with the Fédération Départementale des Chasseurs de la Haute Garonne for allowing us to work in the central forest and the surrounding fragmented area respectively. N. Navarro-Gonzalez was supported by the FPU programme from the Ministerio de Educación, Spain, and E. Serrano by the Juan de la Cierva programme, from the Ministerio de Ciencia e Innovación, Spain. The manuscript was improved by constructive comments of an anonymous reviewer.
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Navarro-Gonzalez, N., Verheyden, H., Hoste, H. et al. Diet quality and immunocompetence influence parasite load of roe deer in a fragmented landscape. Eur J Wildl Res 57, 639–645 (2011). https://doi.org/10.1007/s10344-010-0474-x
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DOI: https://doi.org/10.1007/s10344-010-0474-x