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Trade-offs among spatio-temporal management actions for a mixed-stock fishery revealed by Bayesian decision analysis

Whitlock, Rebecca and Pakarinen, T. and Palm, Stefan and Koljonen, M. L. and Östergren, Johan and Dannewitz, Johan (2021). Trade-offs among spatio-temporal management actions for a mixed-stock fishery revealed by Bayesian decision analysis. ICES Journal of Marine Science. 78 , 3625-3638
[Research article]

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Abstract

Management and conservation of populations that are harvested simultaneously present a unique set of challenges. Failure to account for differences in productivity and spatio-temporal abundance patterns can lead to over-exploitation of depleted populations and/or loss of potential yield from healthy ones. Mixed-stock fisheries (where a stock may comprise one or more populations of reared or wild origin) harvest multiple stocks, often in unknown proportions, and lack of tools for estimation of stock-specific harvest rates can hamper status evaluations and attainment of management goals. We present a method for evaluating stock-specific impacts of alternative harvest strategies, using coastal trap net fisheries for Atlantic salmon (Salmo salar) in the Baltic Sea as a case study. Our results demonstrate a large variation among stocks in coastal mixed fishery harvest rates, as well as large differences in harvest rates relative to stock-specific maximum sustainable yield (MSY) and recovery levels. Bayesian decision analysis showed that spatio-temporal management actions, such as delayed fishery opening and closed areas may be effective in improving probabilities of meeting management objectives for Baltic salmon. However, stocks did not respond uniformly to different management actions, highlighting the potential for trade-offs in reaching stock-specific targets that must be considered by managers.

Authors/Creators:Whitlock, Rebecca and Pakarinen, T. and Palm, Stefan and Koljonen, M. L. and Östergren, Johan and Dannewitz, Johan
Title:Trade-offs among spatio-temporal management actions for a mixed-stock fishery revealed by Bayesian decision analysis
Series Name/Journal:ICES Journal of Marine Science
Year of publishing :2021
Volume:78
Page range:3625-3638
Number of Pages:14
ISSN:1054-3139
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Fish and Aquacultural Science
URN:NBN:urn:nbn:se:slu:epsilon-p-115691
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-115691
Additional ID:
Type of IDID
DOI10.1093/icesjms/fsab203
ID Code:26813
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Department of Aquatic Resources
Deposited By: SLUpub Connector
Deposited On:24 Jan 2022 13:25
Metadata Last Modified:24 Jan 2022 13:31

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