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When overfishing is present, alternative livelihoods are the most promising type of intervention

When stocks have become overfished, fisheries can no longer recover on their own. Fishing communities with no alternative income sources will continue to fish a dwindling resource. Input controls are not effective because the stock decay is now self-reinforcing and is not caused by new boats or fishing gear arriving in the fishery. (See Input controls by themselves.)

Interventions providing alternative means of livelihood can help in this situation, taking part of the community permanently or temporarily away from fishing by providing profitable alternatives. As stocks recover, fishing revenue rebounds as well, which means that the intervention does not need to remain in place forever.

Simulate an intervention providing alternative work (move slider to max), then limiting the number of fishing vessels

Double Init. Pop.

In this overfished scenario stocks are collapsing

When alternative occupations were provided, people fish less because it is not very profitable

Combining alternative livelihoods with input controls, stocks are stabilized and the fish exploited in a sustainable manner

Stocks collapsed, family incomes are below the subsistence line

Providing income sources has brought families back above subsistence line

Combining alternative livelihoods with input controls, family incomes are temporarily propped by the intervention, but then continue to grow as the fishery recovers its profitability