The stochastic life-cycle model (SLCM) : simulating the population dynamics of anadromous salmonids /

Abstract

He received masters' degrees in ecology from the University of Tennessee and applied statistics from Louisiana State University, and a Ph.D. degree in wildlife and fisheries sciences from Texas A&M University. He joined the Forest Service in 1 991 , and has been modeling the population dynamics of salmonids since 1983. His current research focuses The model is written in the SAS® programming language, which allows the model to operate on a variety of computing systems and provides enhanced flexibility in the analysis of model output. Users of the model need not be proficient in SAS. Simple input forms and ancillary programs to analyze model results allow users to run the model with a minimum of prior instruction.

A hierarchical approach to fisheries planning and modeling in the Columbia River Basin

“…Among the models that have been developed for use in the Columbia system thus far, a broad range of modeling techniques or approaches have been used, including stochastic compartment models, difference equations, and individualistic models (e.g., Anderson and others 1993, Beamesderfer and others 1990, Lee 1991, Lee and Hyman 1992, Schaller and others 1992. These differences in model structure reflect both the personal preferences of individual researchers and the unique conceptual and physical dimensions that characterize each stage of the life cycle.…”

“…The debate over the Snake River stocks prompted the development of three additional population-level models that could provide the probabilistic analyses needed for these high-risk stocks. The models included the Stochastic Life-Cycle Model (Lee and Hyman 1992), which resembles the System Planning Model in structure but includes stochastic processes, and a pair of empirically based models that are similar to traditional cohort harvest models (Schailer andothers 1992).…”

Columbia River System Operation Review : Final Environmental Impact Statement, Appendix D: Exhibits.

“…The model's primary purpose is not to predict actual numbers of surviving juvenile fish or adult fish returning in the future, but to compare the results of different system operation 4 alternatives. A detailed description of this model can be found in Lee and Hyman (1992).…”

Supplementation in the Columbia Basin : Summary Report Series : Final Report.

“…The model developed by Lee and Hyman (1991) improved on the SPM by incorporating stochastic variation at each life-history stage; however, their model did not recognize differences in fitness in hatchery and wild populations. Environmental variation is incorporated in the RASP model as described on page 28.…”