Implementation of Predator-Prey Models for Great Lakes Fishes

摘要

The alewife (Alosa pseudoharengus) first appeared in Lake Michigan in the late 1940's and has played a dominant role in the lake for over 20 years (Brown 1972). Wells (1970) and others have documented major changes in zooplankton community structure associated with the alewife increase in Lake Michigan. The objectives in modeling alewife growth and consumption are to assess the seasonal impact of alewife predation on zooplankton populations, to assess the relative contribution of different age classes of alewives to the predation occurring on zooplankton, and estimate the impact of that predation on the nutrient cycling processes occurring in the plankton.