| 72 | 72 | Use the '''Objectives'''table (Figure 11.3) to define objective function weights for '''Net economic value''' (total landed value of catch minus total operating cost); '''Social value (employment)''', i.e., a social indicator, assumed proportional to gross landed value of catch for each fleet with a different jobs/landed value ratio for each fleet; and two ecological objectives: 1. '''Mandated rebuilding''' of one group (value of the objective function is measured by departures of biomasses over time from target biomass levels specified by entering ratios of target to Ecopath base biomasses); and 2.''' Ecosystem structure''', which favours biomasses of large, long-lived organisms. See '''Policy objectives''' in [wiki:EwEugFishingPolicySearch Fishing policy search] and Christensen and Walters (2004b) for more details about these objectives. |
