Table 2. Net present value (NPV; billions of 2008 dollars per year) for spatial management scenarios under various reductions of shrimp catch.

Scenario	Reduction in shrimp catch
	10%	20%	30%	40%	50%
Vaquita refuge	3.006	2.982	2.958	2.934	2.909
Extended refuge	2.960	2.922	2.882	2.844	2.805
Primary area	2.965	2.913	2.867	2.820	2.761
Distribution area	2.657	2.628	2.599	2.570	2.538

We applied a range of reductions in shrimp catch in the light trawl fleet relative to the shrimp driftnet fleet (10%–50%), as shrimp catch in the light trawl will be dependent on fishers' experience and training [25], [43]. NPV for the No management scenario was 2.853.