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Revista Panamericana de Salud Pública

On-line version ISSN 1680-5348Print version ISSN 1020-4989


AMAKU, Marcos; DIAS, Ricardo Augusto  and  FERREIRA, Fernando. Canine population dynamics: the potential effect of sterilization campaigns. Rev Panam Salud Publica [online]. 2009, vol.25, n.4, pp.300-304. ISSN 1680-5348.

OBJECTIVE: To analyze, through mathematical modeling, the potential ability of sterilization campaigns to reduce the population density of pet dogs. METHODS: Mathematical models were constructed to simulate the canine population dynamics and project the results of control strategies based on several sterilization rates. RESULTS: Even at high sterilization rates (for example, 0.80 year-1), it would take approximately 5 years to reduce density by 20%. Even so, other sources of population growth, such as the importing of dogs from other geographic areas, could outweigh the effects of a sterilization program. CONCLUSIONS: A program's effectiveness is contingent upon not only on the sterilization rate, but also the rate of population growth. Sterilization campaigns may potentially reduce population density, but this reduction may not be immediately evident.

Keywords : Population dynamics; dogs; population control; sterilization, reproductive; computer simulation; Brazil.

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