Comparison of three models predicting developmental milestones given environmental and individual variation
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In all organisms, phenotypic variability is an evolutionary stipulation. Because the development of poikilothermic organisms depends directly on the temperature of their habitat, environmental variability is also an integral factor in models of their phenology. In this paper we present two existing phenology models, the distributed delay model and the Sharpe and DeMichele model, and develop an alternate approach, called the Extended von Foerster model, based on the age-structured McKendrick-von Foerster partial differential model. We compare the models theoretically by examining the biological assumptions made in the basic derivation of each approach. In particular, we focus on each model’s ability to incorporate variability among individuals as well as variability in the environment. When compared against constant temperaturemountain pine beetle (Dendroctonus ponderosae Hopkins) laboratory developmental data, the Extended von Foerster model exhibits the highest correlation between theory and observation.
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- Comparison of three models predicting developmental milestones given environmental and individual variation
Bulletin of Mathematical Biology
Volume 66, Issue 6 , pp 1821-1850
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- 1. Department of Mathematics and Statistics, Utah State University, 3900 Old Main Hill, Logan, Utah, 84322-3900, USA
- 2. USDA Forest Service Logan Forestry Sciences Lab, Utah State University, Logan, Utah, 84322-8000, USA