The development of models for sustainable fisheries

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dc.contributor.advisor Basil Sharp en
dc.contributor.advisor John Montgomery en
dc.contributor.advisor Brian McArdle en Batstone, Christopher John en 2007-09-04T03:56:52Z en 2007-09-04T03:56:52Z en 1999 en
dc.identifier.citation Thesis (PhD--Biological Sciences)--University of Auckland, 1999. en
dc.identifier.uri en
dc.description Restricted Item. Print thesis available in the University of Auckland Library or may be available through Interlibrary Loan. en
dc.description.abstract In 1986 the New Zealand system of fisheries management was reformed. The Quota Management System (QMS) augmented the existing input control regulatory instruments with a system of output controls: individual transferable quota (ITQ). This thesis examines a number of aspects of the QMS in the context of a case study of the SNA1 snapper fishery. The QMS model is contrasted with a dynamic optimization model of rights based fishing which shows the effectiveness of ITQ systems in resolving the open access problem and that proportional share ITQ prices potentially contain information about the biological and economic state of a fishery. Departures of the QMS from the theoretical model are noted, particularly the allocation mechanism, the continued application of open access input control apparatus, and the basis of total allowable catch definition. Input control is considered in a bioeconomic model of the Hauraki Gulf sub-stock of the SNA1 fishery that features a sea surface temperature recruitment sub-model. Changes to the minimum legal size regulation (MLS) and the effect of differing inter-temporal recruitment structures on rent generation are evaluated. The biological and economic inefficiency of size regulation and the unequal distribution of risk between sectors in this fishery under the current management regime are demonstrated. The potential role for discount rates as performance indicators is shown. An intra-cohort stock externality due to growth overfishing is evident. The productive capacity of the SNA1 fishery system is presently not fully utilized. Output control is examined through time series analyses of prices in SNA1 ITQ markets. To date government has relied on the results of stock assessment research when setting the allowable harvest and monitoring the performance of fisheries policy. Excessive reliance on biological data, in particular modelling outputs, has attracted criticism. An alternative, a minimum information system uses information contained in quota prices as indicators of the biological and economic health of a fishery. SNA1 quota ownership and lease markets are found to exhibit the characteristics of weak form efficiency. Prices reflect expected rents in the fishery. However, at this stage of their development prices also reflect firms' uncertainty over expectations of fishery management agency behavior. Concern has been expressed that ITQ systems may be compromised by market failure through the exercise of market power. Evidence of market power is found in the SNA1 market for ITQ lease title. Explicit non-commercial quota, a review of the effectiveness of remnant pre-QMS regulatory instruments, and a substantial role for economic information in the total allowable catch setting process and as performance indicators form the basis of recommendations for policy. en
dc.format Scanned from print thesis en
dc.language.iso en en
dc.publisher ResearchSpace@Auckland en
dc.relation.ispartof PhD Thesis - University of Auckland en
dc.relation.isreferencedby UoA917788 en
dc.rights Whole document restricted. Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. en
dc.rights.uri en
dc.title The development of models for sustainable fisheries en
dc.type Thesis en Biological Sciences en The University of Auckland en Doctoral en PhD en
dc.subject.marsden Fields of Research::270000 Biological Sciences::270700 Ecology and Evolution::270702 Marine and estuarine ecology (incl. marine ichthyology) en
dc.rights.holder Copyright: The author en
pubs.local.anzsrc 06 - Biological Sciences en
dc.rights.accessrights en Faculty of Science en

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