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Local variation in helminth burdens of Egyptian spiny mice (Acomys cahirinus dimidiatus) from ecologically similar sites: relationships with hormone concentrations and social behaviour

Barnard, C.J.; Sayed, E.; Barnard, L.E.; Behnke, J.M.; Abdel Nabi, I.; Sherif, N.; Shutt, A.; Zalat, S.

Authors

C.J. Barnard

E. Sayed

L.E. Barnard

J.M. Behnke

I. Abdel Nabi

N. Sherif

A. Shutt

S. Zalat



Abstract

Populations of Egyptian spiny mice (Acomys cahirinus dimidiatus) in a fragmented montane wadi system in the Sinai showed significant differences in the abundance of gut helminths. Differences in parasite load between populations were positively associated with measures of androgen activity but showed no significant relationship with glucocorticoid activity. Social discrimination tests with adult males from different wadis showed that those from sites with greater helminth abundance were less likely to investigate odours from other males and were less aggressive when subsequently interacting with the odour donors. Subjects showed markedly more investigation towards the odours of males from distant wadis compared with those from their own or immediately neighbouring wadi, but were less aggressive when confronted with odour donors from distant wadis. Despite this, there was a positive relationship between the amount of investigation towards distant male odour and subsequent aggression towards the male. While aggressiveness was positively associated with measures of androgen and glucocorticoid activity, no significant relationship emerged with individual helminth infection. Thus aggressiveness appeared to relate to overall local population levels of infection rather than individual challenge.

Journal Article Type Article
Publication Date Jan 1, 2003
Journal Journal of Helminthology
Print ISSN 0022-149X
Electronic ISSN 0022-149X
Publisher Cambridge University Press (CUP)
Peer Reviewed Peer Reviewed
Volume 77
Issue 3
APA6 Citation Barnard, C., Sayed, E., Barnard, L., Behnke, J., Abdel Nabi, I., Sherif, N., …Zalat, S. (2003). Local variation in helminth burdens of Egyptian spiny mice (Acomys cahirinus dimidiatus) from ecologically similar sites: relationships with hormone concentrations and social behaviour. Journal of Helminthology, 77(3), doi:10.1079/JOH2003189
DOI https://doi.org/10.1079/JOH2003189
Publisher URL http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=711080&fileId=S0022149X03000301
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingh.../end_user_agreement.pdf
Additional Information Copyright Cambridge University Press.

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Barnard et al 2003 J Helm 77, 197 Egypt spinies & hormones.pdf (197 Kb)
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Copyright Statement
Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf





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