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Development of Updated Operating Models for the IJsselmeer/Markermeer
This report presents the ongoing work and initial testing for the operating models (OM) utilized for the 2023 management strategy evaluation (MSE) analysis of four commercially important fish stocks (pikeperch, perch, bream, roach) within the IJssel/Markermeer complex. In recent years, these stocks have witnessed a concerning decline prompting the Ministry of Agriculture, Nature, and Food Quality to take management decisions based on the best available scientific information. With the goal of long term sustainability while allowing the highest possible commercial catches, an MSE analysis of the IJssel/Markermeer stocks was conducted in 2019/2020. Following the results of the previous MSE, an...
Management Science in Fisheries
A key goal of fisheries management is to regulate extractive pressure on a resource so as to ensure social, economic and ecological sustainability. This text provides an accessible entry point for students and professionals to management science as developed in fisheries, in order to facilitate uptake of the latest ideas and methods. Traditional management approaches have relied upon a stock assessment based on existing understanding of resource status and dynamics, and a prediction of the likely future response to a static management proposal. However all such predictions include an inherent degree of uncertainty, and the last few decades have seen the emergence of an adaptive approach that...
Scientific, Technical and Economic Committee for Fisheries (STECF)
The STECF was tasked with an analysis of the likely effects of proposed management plans for the Southwestern (Bay of Biscay and Iberia) and Northwestern (Celtic sea) waters. Quantitative analyses were carried out to compare the likely effect of those management plans and of the direct application of the CFP on both stocks and fleets involved in these fisheries. Based on the results of simulations of the provisions of the proposed management plans, STECF concluded that, setting fishing opportunities in line with single-species FMSY ranges will provide managers with additional flexibility compared to the basic provisions of the 2013 CFP. Such flexibility is likely to help alleviate the proble...
Development, Implementation and Initial Testing of Candidate Management Procedures for the IJsselmeer/Markermeer
This report presents the work that was carried out in 2022 to develop a new set of candidate management strategies for the pikeperch, perch, bream and roach fisheries in the IJsselmeer – Markermeer complex. The management procedures proposed here are based on stock indicators that can be derived from the two main sources of data available for these stocks: 1) changes in abundance obtained from the scientific survey, and 2) landings quantities and composition from the commercial fisheries within the complex. The status indicators derived from these data are used in harvest control rules, set to propose a total allowable catch for the following year. These new developments build upon the experience from the previous Management Strategy Evaluation analysis (Tien et al. 2020a&b), and extends the set of options available. This report provides a brief demonstration of the application of the updated management tools on the pikeperch and bream operating models.
Fish Forum Book of abstracts 2018
This volume includes all the abstracts of the keynotes, oral contributions and posters presented by participants on the occasion of the Forum on Fisheries Science in the Mediterranean and the Black Sea (Fish Forum 2018). Organized by the GFCM at FAO headquarters, Rome, Italy, from 10 to 14 December 2018, in collaboration with technical partners, the Fish Forum 2018 is a first-of-the-kind event gathering scientists, researchers, engineers, academics, practitioners, managers and decision-makers from around the world to discuss and share knowledge on the latest developments in fisheries science. The material contained in this book of abstracts stems from the contributions received from particip...
Workshop on North Sea Stocks Management Strategy Evaluation (WKNSMSE)
WKNSMSE (Workshop on North Sea stocks Management Strategy Evaluation) took place over two physical meetings (19-21 November 2018 and 26-28 February 2019, but at ICES HQ, Copen-hagen) and several WebEx meetings, was chaired by José De Oliveira (UK) and included 30 par-ticipants from Denmark, Germany, Netherlands, Norway, Sweden, UK and the European Com-mission, and two reviewers from South African and New Zealand. The purpose of this work was to evaluate long-term management strategies for jointly-managed stocks in the North Sea (cod, haddock, whiting, saithe and autumn-spawning herring) between the European Union and Nor-way, following a request from EU-Norway. The first physical meeting pr...
