Allowing for time-variant fishing proportions in the simulation model

Time-variant proportions of the exploitable resource harvested by the industry are explored to investigate whether this would better reflect the yearly patterns of the pack data. The simulation model has been modified to be fitted to annual pack data. Results show a slight improvement to the model fit, but the annual patterns in the pack data are still not being replicated particularly satisfactorily. This is an intermediate step in moving from this form of analysis to an assessment model; this will be elaborated further in a following paper.