File(s) under permanent embargo
Assessing a multilevel tier system: The role and implications of data quality and availability
journal contribution
posted on 2023-05-19, 07:10 authored by Dowling, N, Punt, A, Richard Little, Dichmont, CM, David SmithDavid Smith, Haddon, M, Sporcic, M, Elizabeth FultonElizabeth Fulton, Gorton, RJTier systems for fisheries assessment and management are widely used, but defined differently by jurisdiction. A principal component analysis was applied to the expanded Australian Commonwealth 8-tier system for fishery assessment and management to determine whether it adequately delineates across stocks according to data availability and quality. The original Australian tiers comprised four levels that were defined primarily according to the available stock assessment options, given the data availability and quality. We asked fishery experts to score information quality for each of the main Australian Commonwealth species and/or fisheries. Multivariate analysis indicated that the eight tiers delineated between the extreme tier levels on the first principal component, although there was overlap for intermediate tiers. More generally, it is important that the aim of tier systems and the basis for tier delineations are explicitly defined given the increasing association of tiers with trade-offs between overfishing risk, management cost and catch.
History
Publication title
Fisheries ResearchVolume
183Pagination
588-593ISSN
0165-7836Department/School
Institute for Marine and Antarctic StudiesPublisher
Elsevier Science BvPlace of publication
Po Box 211, Amsterdam, Netherlands, 1000 AeRights statement
Copyright 2016 Crown CopyrightRepository Status
- Restricted