Projects per year
Abstract
We 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.
Original language | English |
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Article number | fsac223 |
Journal | ICES Journal of Marine Science |
Volume | 80 |
Issue number | 1 |
Pages (from-to) | 173-184 |
Number of pages | 12 |
ISSN | 1054-3139 |
DOIs | |
Publication status | Published - 2023 |
Keywords
- Clupeid
- Genetic stock identification
- Genomics
- Management units
- Migration
- Mixed stock-analysis
- Population structure
- SNP
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Dive into the research topics of 'Mixed-stock analysis of Atlantic herring (Clupea harengus): a tool for identifying management units and complex migration dynamics'. Together they form a unique fingerprint.Projects
- 1 Finished
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GENBYGSILD: Rebuilding Western Baltic spring spawning herring (39798/100175)
Bekkevold, D. (Project Coordinator), Mosegaard, H. (PI), Berg, C. W. (PI), Norin, T. (PI), Trijoulet, V. (PI), Christensen, A. (Project Participant), van Deurs, M. (Project Participant), Nielsen, A. (Project Participant), Støttrup, J. G. (Project Participant) & Håkansson, K. B. (Project Participant)
10/06/2020 → 21/02/2022
Project: Research