Fig. 1. Metapopulation model used for the simulations. Individuals mature to become adults at either the small size (C2) or the large size (C4). In one subpopulation (*, upper flow diagram) large individuals of class 4 are fished, the other subpopulation (lower flow diagram) is protected by a reserve. Connectivity is included through export of individuals of class C2, C3, and C4. Individual movement probability (m) is multiplied by the size of the respective destination area, r or (1 - r).