Measures of dung bolus size for known-age African elephants (Loxodonta africana): implications for age estimation

Morrison, T. A. , Chiyo, P. I., Moss, C. J. and Alberts, S. C. (2006) Measures of dung bolus size for known-age African elephants (Loxodonta africana): implications for age estimation. Journal of Zoology, 266(1), pp. 89-94. (doi: 10.1017/S0952836905006631)

Full text not currently available from Enlighten.


The availability of a population of mostly known‐age African elephants Loxodonta africana from Amboseli National Park, Kenya, provided a unique opportunity to assess the use of dung bolus diameter for estimating age. A predictive equation for estimating dung bolus diameters from elephants of known age was derived and was found to follow the typical growth pattern exhibited by changes in shoulder height and foot length. The relationship between measurements of dung bolus and age was particularly strong when growth rates were high (age 0–25 years). The dung bolus growth curve from Amboseli elephants was similar to that derived from another wild population of African elephants, suggesting that dung bolus diameter can be used to assess age structure in areas where it is impossible to construct independent prediction curves of age and dung bolus.

Item Type:Articles
Additional Information:This research was supported by the National Science Foundation (IBN0091612 S.C.A), the African Elephant Conservation Trust, and the Amboseli Elephant Research Project.
Glasgow Author(s) Enlighten ID:Morrison, Dr Thomas
Authors: Morrison, T. A., Chiyo, P. I., Moss, C. J., and Alberts, S. C.
College/School:College of Medical Veterinary and Life Sciences > School of Biodiversity, One Health & Veterinary Medicine
Journal Name:Journal of Zoology
ISSN (Online):1469-7998

University Staff: Request a correction | Enlighten Editors: Update this record