. creation of a marine reserve as regards fisheries management. The maximum maximorum of catches (and, a fortiori, of fishing rent 10 ) is achieved with a zero α. However, as was stated by Holland and. BONCOEUR, ALBAN, GUYADER AND TH ´ EBAUD Exogenous variables and parameters: r j intrinsic growth rate of biomass j (j =F, S ) X Fmax fish carrying capacity of the whole area (zones 1 and 2) α share of. NATURAL RESOURCE MODELING Volume 15, Number 4, Winter 2002 FISH, FISHERS, SEALS AND TOURISTS: ECONOMIC CONSEQUENCES OF CREATING A MARINE RESERVE IN A MULTI-SPECIES, MULTI-ACTIVITY CONTEXT JEAN