Techniques for Biological Assessment in Fisheries Management: Report of the Workshop Jülich July 17-24, 1991

• Main Author: Unknown
• Format: Book
• Language: English
• Published: Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag 1992
• Subjects: Butterworth; Antarc*; Antarctica
• Online Access: https://juser.fz-juelich.de/record/891598; https://juser.fz-juelich.de/search?p=id:%22FZJ-2021-01609%22

The workshop was conceived through discussions between J. Shepherd, J.Gulland, D. Butterworth, and J. M. McGlade, who felt that there wasinsufficient communication among fisheries scientists around the world,particularly about stock assessment methods. Despite a large degree of commonground, this lack of contact had lead to an unecessary divergence of methodsand a duplication in and terminology and effort. It was therefore consideredthat a workshop where common problems and possible solutions could bediscussed would help to address some of these issues . The proposed workshopwas formally adopted as a Case Study of Project Prospero (1988 see AppendixA), and made possible by a grant from the Commission of the EuropeanCommunities (C.E.C. DG XIV) in 1991.The workshop was held at the Forschungszentrum Jülich, Germany from17-24 July 1991, and was attended by 27 invited participants from 12 countriescovering every continent (except Antarctica) including a representative of theC.E.C. It took the form of several days of presentations on the situationsencountered in various parts of the world, and the methods used for fisheriesassessment and management. These were followed by three extended discussionson - the usefulness and performance of various methods of assessmentcurrently in use, with emphasis on age-based techniques- methods for determining and presenting the levels of risk associatedwith management options- the interplay between the objectives of management and the methodsof assessment used, and the implications for management strategy andtactics.Interspersed among the presentations and discussions were a number of "handson"demonstrations of assessment software including- ADAPT (Adaptive Framework)- ICES VPA tuning methods- CAGEAN (Catch at age analysis)- Extended Survivors Analysis (XSA)- ECOPATH- FAO /ICLARM Stock Assessment Tools (FISAT)- PC: VPA- PC: PROD (Stock Production Model)- Risk Analysis- Length based ADAPTMore information on these software packages is provided in Appendix C. [.]