title: Estimation of dynamic rate parameters in insect populations undergoing sublethal exposure to pesticides.
abstract: 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.
authors: Center for Research in Scientific Computation, North Carolina State University, Raleigh, NC 27695-8205, USA. htbanks@ncsu.edu
authors: H T
authors: HT
authors: Banks
authors: John E
authors: JE
authors: Banks
authors: Lara K
authors: LK
authors: Dick
authors: John D
authors: JD
authors: Stark
mesh_terms: D000367:Age Factors; D000465:Algorithms; D000818:Animals; D001042:Aphids / Q000254:growth & development; D003198:Computer Simulation; D016001:Confidence Intervals; D005298:Fertility / Q000187:drug effects; D007313:Insecta / Q000254:growth & development*; D008954:Models, Biological; D010571:Pest Control / Q000379:methods*; D010575:Pesticides / Q000633:toxicity*; D011156:Population Density; D011157:Population Dynamics; D011158:Population Growth; D016019:Survival Analysis; D013997:Time Factors; D031307:Vicia faba / Q000254:growth & development
chemical_list: D010575:Pesticides