freeroam cat pop intervention model
One can review all the presentations and assess your own comfort level with some research.
Proceedings of the 7th Quadrennial International Symposium on Canine and Feline Reproduction - ISCFR 2012
July 22-29, 2012 - Whistler Canada
Presentation of note:
downloadable pdf: Development of an Individually Based Simulation Model to Compare Predicted Results of Different Interventional Methods on Feral and Free-roaming Cat Populations
McCarthy RJ 1; Levine SH 2 and Reed M
Tufts University: 1 Department of Veterinary Clinical Sciences, Cummings School of Veterinary Medicine, 2 Department of Civil Environmental Engineering, 3 Department of Biology
[excerpts, always read entire]
OBJECTIVE: We created an individually based, stochastic simulation model that allows for evaluation of different interventions (capture rates, sterilization methods) on feral and free-roaming cat populations.
For the purpose of this study we specifically evaluated the effect of three different interventions on an isolated population of feral or free-roaming cats: permanent removal from the population of all trapped cats (trap-elimination, TE), castration of males and ovariohysterectomy of females followed by releasing them back into the population (standard TNR), and vasectomy of males with hysterectomy of females followed by releasing them back into the population (TVHR).
CONCLUSION: Our model results suggest that for a wide range of trapping rates, TVHR outperforms TNR and TE for controlling feral cat populations. In addition, for some range of trapping rates TNR actually increases the standing feral cat size. This model should be useful for individuals, organizations and government agencies for determining the required financial and manpower commitment required to have a desired effect on feral cat populations.