Journal article
Mixed-stock analysis of Atlantic herring (Clupea harengus): a tool for identifying management units and complex migration dynamics
National Institute of Aquatic Resources, Technical University of Denmark1
Section for Oceans and Arctic, National Institute of Aquatic Resources, Technical University of Denmark2
Section for Marine Living Resources, National Institute of Aquatic Resources, Technical University of Denmark3
Institute of Marine Research4
Johann Heinrich von Thunen Institute5
Swedish University of Agricultural Sciences6
Section for Coastal Ecology, National Institute of Aquatic Resources, Technical University of Denmark7
University College Dublin8
Klaipėda University9
Uppsala University10
...and 0 moreWe developed and validated a mixed-stock analysis (MSA) method with 59 single-nucleotide polymorphisms selected from genome-wide data to assign individuals to populations in mixed-stock samples of Atlantic herring from the North and Baltic seas. We analysed 3734 herring from spawning locations and scientific catches of mixed feeding stocks to demonstrate a “one-fits-all” tool with unprecedented accuracy for monitoring spatio-temporal dynamics throughout a large geographical range with complex stock mixing.
We re-analysed time-series data (2002–2021) and compared inferences about stock composition with estimates from morphological data. We show that contributions from the western Baltic spring-spawning stock complex, which is under management concern, have likely been overestimated. We also show that a genetically distinctive population of western Baltic autumn spawners, ascribed low fisheries importance, contributes non-negligible and potentially temporally increasing proportions to mixed-stock aggregations, calling for a re-evaluation of stock definitions.
MSA data can be implemented in stock assessment and in a variety of applications, including marine ecosystem description, impact assessment of specific fleets, and stock-rebuilding plans.
Language: | English |
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Year: | 2023 |
Pages: | 173-184 |
ISSN: | 10959289 and 10543139 |
Types: | Journal article |
DOI: | 10.1093/icesjms/fsac223 |
ORCIDs: | Bekkevold, Dorte , Ojaveer, Henn , Mosegaard, Henrik , Hemmer-Hansen, Jakob , Huwer, Bastian , Trijoulet, Vanessa , Albertsen, Christoffer Moesgaard and Jansen, Teunis |