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| Abstract |
- By 1992, the Canadian cod populations collapsed and
a moratorium on fishing was declared, which
remains in place until today. Ecologists suspect that the marine ecosystem at the Canadian east coast
has
shifted towards a new regime, where cod stocks remain at a low level while other species biomass levels,
especially cod prey, including forage fishes, shrimp and large crustaceans remain high. Meanwhile, the
economic importance of lobster, snow crab, shrimp,
caplin, halibut and other fisheries increased and
represent currently the most valuable fisheries in
Atlantic Canada. To study the economic consequences
of the regime shift, we set up a bioeconomic model
considering three species (or species groups), cod,
pelagics, and shellfish. Cod preys on shellfish and
pelagics but is also controlled by competition and
predation by pelagic species in early live stages.
We study (a) the implications for efficiency, i.e.
the
aggregate economic benefits derived from using the
ecosystem with and without a regime shift, and (b)
the distributional implications of a regime shift,
i.e. the distribution of benefits for different stakeholder
groups from using the ecosystem with and without a
regime shift. We find that, in terms of the aggregate
present value of incomes, the shift the North West
Atlantic ecosystem resulted only in a small net loss for
the Newfoundland region, but that the net welfare loss main have been large, given the distributional
effects on different groups of fishermen.
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| Date Available |
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| Date Issued |
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| Citation |
- Gola, L. & M. Quaas. The Economic Consequences of Regime Shifts in Marine Ecosystems. Visible Possibilities: The Economics of Sustainable Fisheries, Aquaculture and Seafood Trade: Proceedings of the Sixteenth Biennial Conference of the International Institute of Fisheries Economics and Trade, July 16-20, Dar es Salaam, Tanzania. Edited by Ann L. Shriver. International Institute of Fisheries Economics and Trade (IIFET), Corvallis, 2012.
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| Rights Statement |
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| Funding Statement (additional comments about funding) |
- AQUAFISH, USAID, NEPAD Planning and Coordination Agency, Norad, The World Bank, Hyatt Regency Dar es Salaam, NAAFE, World Wildlife Fund, United Nations University Fisheries Training Programme, ICEIDA, JICA, JIFRS, The European Association of Fisheries Economists, International Seafood Sustainability Foundation
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| Additional Information |
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Previous issue date: 2012
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