Bio-economic modeling of financial incentives for tuna fisheries management (BESTTuna subproject 5b)

This subproject analysis whether market-based instruments and in particular certification can improve the overall sustainability and efficiency of the tuna fisheries on yellowfin and bigeye tuna in the Western and Central Pacific, focussing on a range of Indonesian fisheries (handline, purse seine, trolling etc.) on Fish Aggregating Devices, targeting the three tropical oceanic tuna‟s (skipjack, yellowfin and bigeye). Furthermore we aim to analyse the effects of these instruments on the distribution of resource rents among stakeholders.


Market-based instruments can improve tuna management, but their effects can also be disappointing or even adverse.


This project aims to investigate to what extent certification and transferable fishing effort schemes can help management of skipjack, bigeye, and yellowfin tuna in the Coral Triangle region with a focus on the Indonesian EEZ, extending to the Western Pacific achieve economically optimal harvest levels, considering the biological, technical, and economic characteristics of these species and the most important fishing fleets.

The following research questions are addressed:

  1. What harvest levels of skipjack, bigeye, and yellowfin tuna maximizes total fishing rents and consumer surplus on the long term?
  2. To what extent can certification improve the economic and ecological efficiency of the tuna fishery?
  3. What substitution rates between regions and gears in a transferable Vessel Days Scheme maximize total fishing rents and consumer surplus on the long term?
  4. How does the regional distribution of fishing rents depend on transferability of Vessel Days?

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