Interim Report of the Working Group on Methods for Estimating Discard Survival (WGMEDS). 27 November - 1 December 2017 Olhão, Portugal

Type Expertise
Date 2018
Language English
Ref. ICES CM 2018/HAPISG:01
Other localization http://www.ices.dk/sites/pub/Publication%20Reports/Expert%20Group%20Report/HAPISG/2018/01%20WGMEDS%20-%20Report%20of%20the%20Working%20Group%20on%20Methods%20for%20Estimating%20Discard%20Survival.pdf
Author(s) ICES
Contributor(s) Kopp DorotheeORCID, Morfin Marie, Mehault Sonia
Sponsor CIEM
Abstract

The first meeting of the Working Group on Methods for Estimating Discard Survival (WGMEDS), held in Olhão, Portugal, on 27 November – 1 December 2017, was attended by 20 members from 12 countries. Participants addressed the following: • The new Terms of Reference (ToR) for the working group were described, discussed and agreed. These include: a review and update of the guidance on ‘Methods to Estimate Discard Survival’ based on further developments to assess discard survival (ToR a); a meta-analysis of discard survival data to investigate variables influencing survival, with a view to increase survival through modified fishing practices (ToR b); a review of ongoing monitoring requirements and methods that generate data to inform on discard survival (ToR c); and lastly, promoting the application of discard survival estimates in fisheries management, principally through proactive engagement with other EGs and sharing new knowledge (ToR d). Progress was made on ToR a, b and d. • For ToR a, each participant presented methods and results from recent and ongoing projects. Observations and discussions based on these presentations informed on further developments of the guidelines on how to conduct discard survival studies. There was also a dedicated group working on exploring the assumptions and implications of inferring survival probabilities from semiquantified health scores derived from discarded individuals. • For ToR b, a meta-analysis was progressed which continued the work of the group (WKMEDS) to evaluate all published evidence on discard survival of various European (flat)fish species and Norway lobster (Nephrops norvegicus). • For ToR d, text was drafted that concisely explains the work of the group (including outputs from WKMEDS) so that other EGs can quickly determine the progress on discard survival assessments, new evidence of discard survival estimates and its relevance to their work. A work plan was devised to collate and summarise the available evidence on discard survival and its associated uncertainties, to be progressed at the next meeting. Further, to learn more about the ICES standpoint on considering discard survival rates in stock assessments, links were laid at the ICES WGCHAIRS meeting in Copenhagen in January 2018 to begin liaising with some stock assessment working group chairs. • Additionally, final edits were made to the i) ICES Cooperative Research Report were and ii) the manuscript for the critical review paper produced by the Workshop on Methods for Estimating Discard Survival (WKMEDS).

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ICES (2018). Interim Report of the Working Group on Methods for Estimating Discard Survival (WGMEDS). 27 November - 1 December 2017 Olhão, Portugal. CIEM, Ref. ICES CM 2018/HAPISG:01, 23p.https://archimer.ifremer.fr/doc/00472/58386/