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Wrasse fishery on the Swedish West Coast: towards ecosystem-based management

Bourlat, Sarah J. and Faust, Ellika and Wennhage, Håkan and Wikström, Andreas and Rigby, Kristie and Vigo, Maria and Kraly, Paul and Selander, Erik and Andre, Carl (2021). Wrasse fishery on the Swedish West Coast: towards ecosystem-based management. ICES Journal of Marine Science. 78 , 1386-1397
[Research article]

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Abstract

Fishing and translocation of marine species for use in aquaculture is widespread. Corkwing, goldsinny, and ballan wrasse (Symphodus melops, Ctenolabrus rupestris, and Labrus bergylta) are fished on the Swedish west coast for use as cleaner-fish in Norwegian salmon farms. Here, we aim to provide knowledge and recommendations to support ecosystem-based management for wrasse fisheries in Sweden. We compared fished and non-fished areas to test if current fishery levels have led to stock depletion. To gain insight on the role of wrasse in the algal belt trophic chain, we analysed the gut contents of goldsinny and corkwing using metabarcoding. Finally, we analysed the trophic interactions of wrasse and potential prey in a mesocosm study. We could not detect any signs of stock depletion or altered size structure in fished areas compared to the protected control area. Gut analyses confirmed both goldsinny and corkwing as non-specialized, omnivorous opportunists and revealed, with 189 prey taxa detected, a broader spectrum of prey than previously known. Common prey items included mesoherbivores such as small gastropods and crustaceans, but also insects and algae. We conclude that there are no visible signs of stock depletion at the current removal level of wrasses by the fishery. However, this emerging fishery should be closely monitored for potential cascading effects on the algal belt ecosystem, and our study could provide a baseline for future monitoring.

Authors/Creators:Bourlat, Sarah J. and Faust, Ellika and Wennhage, Håkan and Wikström, Andreas and Rigby, Kristie and Vigo, Maria and Kraly, Paul and Selander, Erik and Andre, Carl
Title:Wrasse fishery on the Swedish West Coast: towards ecosystem-based management
Series Name/Journal:ICES Journal of Marine Science
Year of publishing :2021
Volume:78
Page range:1386-1397
Number of Pages:12
Publisher:OXFORD UNIV PRESS
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 > 405 Other Agricultural Sciences > Fish and Wildlife Management
(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Ecology
Keywords:cleaner fish, Ctenolabrus rupestris, diet analysis, ecosystem-based management, mesocosm, metabarcoding, Symphodus melops, wrasse fisheries
URN:NBN:urn:nbn:se:slu:epsilon-p-113568
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-113568
Additional ID:
Type of IDID
DOI10.1093/icesjms/fsaa249
Web of Science (WoS)000692552000017
ID Code:25360
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Department of Aquatic Resources
Deposited By: SLUpub Connector
Deposited On:16 Sep 2021 11:25
Metadata Last Modified:16 Sep 2021 11:31

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