Field-scale dispersal of Aphodius dung beetles (Coleoptera: Scarabaeidae) in response to avermectin treatments on pastured cattle

Webb, L., Beaumont, D.J., Nager, R.G. and McCracken, D.I. (2010) Field-scale dispersal of Aphodius dung beetles (Coleoptera: Scarabaeidae) in response to avermectin treatments on pastured cattle. Bulletin of Entomological Research, 100(2), pp. 175-183. (doi:10.1017/S0007485309006981)

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Publisher's URL: http://dx.doi.org/10.1017/S0007485309006981

Abstract

Very few studies have examined, at the field scale, the potential for faecal residues in the dung of avermectin-treated cattle to affect dung-breeding insects. The current study examined populations of dung beetles (Scarabaeidae: <i>Aphodius</i>) using pitfall traps baited with dung from untreated cattle on 26 fields across eight farms in southwest Scotland. The fields were grazed either by untreated cattle or by cattle treated with an avermectin product, i.e. doramectin or ivermectin. During the two-year study, significantly more beetles were trapped in fields grazed by treated cattle (n=9377 beetles) than in fields where cattle remained untreated (n=2483 beetles). Additional trials showed that beetles preferentially colonised dung of untreated versus doramectin-treated cattle. This may explain the higher captures of beetles in traps baited with dung of untreated cattle, which were located in fields of treated cattle. Given that <i>Aphodius</i> beetles avoided dung of treated cattle in the current study, the potential harmful effects of avermectin residues in cattle dung could be reduced through livestock management practices that maximise the availability of dung from untreated livestock in areas where avermectins are being used

Item Type:Articles
Keywords:attraction, colonisation, doramectin, avermectin, Scarabaeidae
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Nager, Dr Ruedi
Authors: Webb, L., Beaumont, D.J., Nager, R.G., and McCracken, D.I.
Subjects:Q Science > QL Zoology
Q Science > QH Natural history > QH301 Biology
College/School:College of Medical Veterinary and Life Sciences > School of Life Sciences
Journal Name:Bulletin of Entomological Research
ISSN:0007-4853
ISSN (Online):1475-2670
Published Online:09 July 2009

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