Estimating death rates from transect counts
Article first published online: 14 MAR 2008
Volume 16, Issue 1, pages 115–121, February 1991
How to Cite
ZONNEVELD, C. (1991), Estimating death rates from transect counts. Ecological Entomology, 16: 115–121. doi: 10.1111/j.1365-2311.1991.tb00198.x
- Issue published online: 14 MAR 2008
- Article first published online: 14 MAR 2008
- Accepted 28 May 1990
- Death rate;
- population size;
- transect counts;
- Aglais urticae;
- Aricia agestis;
- Coenonympha pamphilus;
- Inachis io;
- Muniola jurtina;
- Thymelicus lineola
- 1The time course of abundance of adult insects emerging in discrete generations is modelled, assuming the absence of net migration and a constant death rate. The time till emergence is assumed to be logistically distributed.
- 2The qualitative features of the model depend on one dimensionless parameter only, namely the product of the death rate and a dispersion measure for the symmetric emergence distribution.
- 3The model is fitted to data on the abundance of five butterfly species. The tit is excellent; moreover, the estimated death rates are well within the range given in the literature (mostly 0.1–0.2 day-1). Death rates are generally obtained by mark-recapture methods. The present model gives the opportunity to evaluate some assumptions of these methods.