Estimation of Dynamic Rate Parameters in Insect Populations Undergoing Sublethal Exposure to Pesticides
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- Banks, H.T., Banks, J.E., Dick, L.K. et al. Bull. Math. Biol. (2007) 69: 2139. doi:10.1007/s11538-007-9207-z
With newer, more environmentally friendly and, subsequently less lethal, pesticides in use, evaluating efficacy of a pesticide now requires more than simply counting deaths after treatment. A discrete, age-structured matrix model that incorporates a species’ life history traits (such as birth rate, death rate and fecundity) has previously been used by ecologists. This model will be presented and discussed along with an alternative continuous, age-structured model which offers significant advantage in considering sublethal damage. We use this continuous model to estimate time-dependent mortality parameters in an ordinary least-squares technique. Confidence intervals are given and results from tests for statistical significance of added parameters are presented.