| Summary: | A simple model is described that uses a combination of stochastically varying mortality during early life and deterministically-driven mortality in the juvenile phase to simulate recruitment. The model is applied to data on walleye pollock Theragra chalcogramma in the Gulf of Alaska and Pacific hake Merluccius productus in the California Current region to simulate a recruitment time series for each stock. When compared with observed recruitment time series, the model simulations accurately capture the trends and characteristics of recruitment for these stocks, demonstrating the interplay of high frequency activating factors and low frequency constraining factors in the complex process of recruitment.
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