1. These variations are available in models such as the two and three parameter logistic models . 2. Another common model for over dispersion when some of the observations are not logistic model . 3. The logistic model was proposed as a simpler alternative, and has enjoyed wide use since. 4. The expected number ( from the logistic model ) can be calculated using the equation from the logistic regression. 5. The logistic models also show density dependence, meaning the per capita population growth rates decline as the population density increases. 6. With rescaling of the ability parameter, it is possible to make the 2PL logistic model closely approximate the cumulative normal ogive. 7. This is a graph of observed proportion of successes in the data and the expected proportion as predicted by the logistic model . 8. Under the logistic model , population growth rate between these two limits is most often assumed to be sigmoidal ( Figure 1 ). 9. Unlike Schaefer's logistic model , MSY in most modern fisheries models occurs at around 30 % of the unexploited population size. 10. The logistic model ( or logistic function ) is a function that is used to describe bounded population growth under the previous two assumptions. 
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