übertool: web applications for ecological risk assessment (beta version)
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Cloud-based environmental models used by the USEPA for evaluating pesticide risks to ecosystems under the Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA) and the Endangered Species Act (ESA).
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Gompertz Model Overview

 

The Gompertz model was first introduced to model mortality by Benjamin Gompertz in 1825. It assumes that population growth rate (rt) decays exponentially:

 

 

Gompertz model has been used to model the growth of tumors and in fisheries ecology in the Fox surplus yield model