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Research Document - 2012/101

A model for simulating harvest strategies applicable to northern shrimp

By M. Desgagnés and L. Savard


A simulation model was developed for comparing the performance of adjustment rules for shrimp harvests in the northern Gulf of St. Lawrence. The model is adapted to the life cycle of the shrimp by including a sex change depending on the length. The model allowed simulation of the observed stock dynamic and to project the trajectory of it over 25 years. The choice of a stock-recruitment relationship, the assumed value of natural mortality and the uncertainty of the early sex change have particularly influenced the population trajectory. However, the use of either of these scenarios did not alter the interpretation of the performance of different rules. The model has proved to be an effective tool to assist in the selection of a harvest adjustment rule.

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