Should a non-linear fisheries regression equation be used in place of the linear fisheries equation?
We will continue to explore the best way to quantify correlations and causal relationships between inflows and estuarine responses. The TxEMP model can accept a variety of model forms. At this time we may still lack, to some extent, the amount of data required to support more complex models. How does TxEMP come up with a solution? A further description of TxEMP is provided in Longley 1994; here instead is a summary. TxEMP is a nonlinear, stochastic, multiobjective mathematical programming model that seeks a combination of inputs which produce the most favorable (optimized) result. TxEMP uses an algorithm to satisfy many, often conflicting requirements as it produces a solution to a problem. The user specifies what system responses to optimize (the objective functions), such as harvest level, and provides data on the driving inputs, such as monthly inflows. The user then sets requirements or limits (constraints) which determine how much the algorithm can change the driving variables and
