Rainbow trout: a population simulation based on individual responses to varying environmental and demographic parameters |
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| Authors: | Fredric M. Serchuk Christopher J. Schmitt Barry Floyd |
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| Affiliation: | (1) Department of Fisheries and Wildlife, Michigan State University, East Lansing, MI 48824, USA;(2) Department of Fisheries and Wildlife, Michigan State University, East Lansing, MI 48824, USA;(3) Department of Computer Science, Michigan State University, East Lansing, MI 48824, USA;(4) Present address: National Marine Fisheries Service, Northeast Fisheries Center, Woods Hole, MA 02543, USA;(5) Present address: U.S. Fish and Wildlife Service, Columbia National Fisheries Research Laboratory, Columbia, Mo 65201, USA |
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| Abstract: | Synopsis An age-structured simulation model of the growth and population dynamics of a migratory rainbow trout population is presented. The model includes all principal life-history intervals and incorporates the food density-temperature relationships of salmonid growth efficiency proposed by Brett et al. (1969) and Shelbourn et al. (1973). Population size, mean weight, and biomass are adjusted and output monthly over time in age, sex, and location categories; a simulation run may continue for as long as 100 years. A variety of environmental and and biological parameters are utilized in the simulation which can be altered as a user option. Simulation results compare favorably with field data. Sensitivity analyses illustrate the importance of age-sex specific maturation ratios, age-class strength fluctuations, and natural mortality rates in determining population size. |
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| Keywords: | Salmo gairdneri Population dynamics Temperature Biomass Production Finger Lakes Growth Mortality Fecundity Computer model |
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