Please use this identifier to cite or link to this item:
Files in This Item:
File SizeFormat 
evaluating performance.pdf617,94 kBAdobe PDFView/Open
Title: Evaluating the performance of survey-based operational management procedures
Authors: Pomarede, Marine; Hillary, Richard; Ibaibarriaga, Leire; Bogaards, Johannes; Apostolaki, Panayiota
Citation: AQUATIC LIVING RESOURCES, 2010, 23, 77-94
Abstract: The design and evaluation of survey-based management strategies is addressed in this article, using three case-study fisheries: North Sea herring, Bay of Biscay anchovy and North Sea cod, with a brief history and the main management issues with each fishery outlined. A range of operational management procedures for the case study stocks were designed and evaluated using trends that may be derived from survey indices (spawner biomass, year-class strength and total mortality) with an array of simple and more structured observation error regimes simulated. Model-free and model-based indicators of stock status were employed in the management procedures. On the basis of stochastic stock-specific simulations, we identified the following key determinants of successful management procedures: (i) adequate specification of the stock-recruit relationship (model structure, parameter estimates and variability), (ii) knowledge of the magnitude and structure of the variation in the survey indices, and (iii) explication of the particular management objectives, when assessing management performance. More conservative harvesting strategies are required to meet specified targets in the presence of increasing stochasticity, due to both process and observation error. It was seen that survey-based operational management procedures can perform well in the absence of commercial data, and can also inform aspects of survey design with respect to acceptable levels of error or bias in the surveys.
Keywords: FLR fishery simulation system; Management strategy evaluation; Fish survey; Fishery-independent data; Herring; Anchovy; Cod; North Sea; Biscay; INTERNATIONAL-WHALING-COMMISSION; STOCK ASSESSMENT METHODS; AFRICAN PELAGIC FISHERY; STRATEGY EVALUATION; SOUTH; EXPERIENCES; INDEXES; MODEL; FLR
Issue Date: 2010
Type: Article
Language: English
DOI: 10.1051/alr/2010005
ISSN: 0990-7440
Appears in Publication types:Artículos científicos

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.