Northwest Fisheries Science Center

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Document Type: Journal Article
Center: NWFSC
Document ID: 4529
Title: How does species association affect mixed stock fisheries management? A comparative analysis of the effect of marine protected areas, discard bans, or individual fishing quotas
Author: Kotaro Ono, Daniel S. Holland, R. Hilborn
Publication Year: 2013
Journal: Canadian Journal of Fisheries and Aquatic Sciences
Volume: 70
Issue: 12
Pages: 1792-1804
DOI: 10.1139/cjfas-2013-0046.
Keywords: multi-species,management,habitat,Bioeconomics,Individual Quotas
Abstract:

We developed a spatially-explicit bio-economic model of a mixed-stock fishery with an unproductive and a productive stock to examine how the spatial overlap between species affect the outcome of a fishery under alternative management methods.  We considered a competitive total allowable catch (TAC) system, with and without a ban on discards and an individual vessel quota (IVQ) fishery managed either to maximum sustainable yield (MSY) or maximum economic yield (MEY). We also evaluated the utility of marine protected areas (MPAs) designed to protect the unproductive species for each management scenario. Banning discarding (whether under a TAC of IVQ) created the biggest increase in profit regardless of species overlap. MPAs reduced the profit in most cases and was not always successful at conserving the unproductive stock above a target size. The IVQ system under MEY produced the most profit among all scenarios while preserving the populations above some target values, but an IVQ managed to MSY produces lower profits than a competitive TAC with a discard ban at some levels of species overlap.

Description:

Simulation model used to evaluate relative effectiveness of alternative managment approaches for a mixed stock fishery

Theme: Ecosystem Approach to Management for the California Current Large Marine Ecosystem
Foci: Describe the interaction between human activities and ecosystem status and resilience.
Characterize ecological interactions (e.g. predation, competition, parasitism, disease, etc.) within and among species to support ecosystem approach to management.
Official Citation:

Ono, K. D.S. Holland and R. Hilborn 2013. How does species association affect mixed stock fisheries management? A comparative analysis of the effect of marine protected areas, discard bans, or individual fishing quotas. Canadian Journal of Fisheries and Aquatic Sciences 70(12): 1792-1804, 10.1139/cjfas-2013-0046.