To effectively model, it is important to outline the assumptions of the model, and managers need to understand what attributes of the system their targets are to meet project goals. According to Kronbak and Vestergaard, the bio-economic model is designed to evaluate what attributes in an ecosystem?

Pick two responses that apply.

a. Changes in biomass level discards and landings under constant population recruitment

b. Considers the change in age and species compositions of fisheries

c. Assumes constant recruitment for model calibration from the base-year and over a 1000-year period to understand how d. changing fishing gear impacts population equilibrium

e. Evaluates the cost per unit biomass at disequilibrium level