Perverse Consequences of Infrequently Culling a Pest
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There are potentially many situations in which creatures will be subject to infrequent but regular culling. In terms of controlling crop pests, some farmers may only be able to afford to apply pesticides occasionally. Alternatively, pesticides may be applied only occasionally to limit their unwelcome side effects, which include pesticide resistance, chemical poisoning of agricultural workers, and environmental degradation. In terms of conservation, some species (such as the red deer in the UK) may be culled occasionally to maintain balances within their ecosystem. However, in this paper we discover, as the culmination of an exploration of adult-stage culling of a creature with juvenile and adult life stages, that, in certain circumstances, regular but infrequent culling will, perversely, increase the average population of the creature.
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- Dixon, A.F.G., 1998. Aphid Ecology: An Optimization Approach. Chapman and Hall, London. Google Scholar
- Donnelly, C.A., Woodroffe, R., Cox, D.R., Bourne, F.J., Cheeseman, C.L., Clifton-Hadley, R.S., Weil, G., Gettinby, G., Gilks, P., Jenkins, H., Johnston, W.T., Le Fevrel, A.M., McInerney, J.P., Morrison, W.I., 2006. Positive and negative effects of widespread badger culling on tuberculosis in cattle. Nature 439, 843–846. CrossRefGoogle Scholar
- Miller, G.T., 2004. Sustaining the Earth, 6th edn. Thompson Learning, Pacific Grove. Google Scholar
- Nicholson, A.J., 1957. The self-adjustment of populations to change. Cold Spring Harbour Symp. Quant. Biol. 22, 153–173. Google Scholar
- Ricker, W.E., 1954. Stock and recruitment. J. Fish. Res. Board Can. 11, 559–623. Google Scholar
- Ricker, W.E., 1958. Handbook of computations for biological statistics of fish populations. Bull. Fish. Res. Board Can. 119, 1–300. Google Scholar
- World Health Organization Press Release (2/11/2000). Pulse Polio Campaign Targets over 107 Million Children in 11 States, http://www.searo.who.int/EN/Section316/Section503/Section2373_12973.htm.