@article{ ISI:000393000500002,
Author = {Ulrich, Clara and Hemmer-Hansen, Jakob and Boje, Jesper and Christensen,
   Asbjorn and Hussy, Karin and Sun, Hailu and Clausen, Lotte Worsoe},
Title = {{Variability and connectivity of plaice populations from the Eastern
   North Sea to the Baltic Sea, part II. Biological evidence of population
   mixing}},
Journal = {{JOURNAL OF SEA RESEARCH}},
Year = {{2017}},
Volume = {{120}},
Pages = {{13-23}},
Month = {{FEB}},
Abstract = {{A multi-disciplinary study was conducted to clarify stock identity and
   connectivity patterns in the populations of European plaice
   (Pleuronectes platessa) in the Skagerrak-Kattegat transition area
   between the Eastern North Sea and the Baltic Sea. Five independent
   biological studies Were carried out in parallel. Genetic markers
   suggested the existence of different genetic populations in the
   transition area. Growth backcalculation with otoliths resulted in
   significant although limited differences in growth rates between North
   Sea and Skagerrak, indicating weak differentiation or important mixing.
   Hydrogeographical drift modelling suggested that some North Sea
   juveniles could settle along the coast line of the Skagerrak and the
   Kattegat. Tagging data suggested that both juveniles and adult fish from
   the North Sea perform feeding migrations into Skagerrak in
   summer/autumn. Finally, survey data suggested that Skagerrak also
   belongs to the area distribution of North Sea plaice. The outcomes of
   the individual studies were then combined into an overall synthesis. The
   existence of some resident components was evidenced, but it was also
   demonstrated that North Sea plaice migrate for feeding into Skagerrak
   and might constitute a large share of the catches in this area. The
   mixing of different populations within a management area has
   implications for stock assessment and management. Choice must be made to
   either lump or split the populations, and the feasibility and
   constraints of both options are discussed. The outcomes of this work
   have directly influenced the management decisions in 2015. (C) 2016
   Elsevier B.V. All rights reserved.}},
Publisher = {{ELSEVIER SCIENCE BV}},
Address = {{PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS}},
Type = {{Article}},
Language = {{English}},
Affiliation = {{Ulrich, C (Reprint Author), DTU Aqua, Jaegersborgs Alle 1, DK-2920 Charlottenlund, Denmark.
   Ulrich, Clara; Boje, Jesper; Christensen, Asbjorn; Hussy, Karin; Clausen, Lotte Worsoe, DTU Aqua, Jaegersborgs Alle 1, DK-2920 Charlottenlund, Denmark.
   Hemmer-Hansen, Jakob, DTU Aqua, Vejlsovej 39, DK-8600 Silkeborg, Denmark.
   Sun, Hailu, BGI Shenzhen, Shenzhen 518083, Guangdong, Peoples R China.}},
DOI = {{10.1016/j.seares.2016.11.002}},
ISSN = {{1385-1101}},
EISSN = {{1873-1414}},
Keywords = {{Plaice; Pleuronectes platessa; Skagerrak; Kattegat; North Sea; Stock
   identity; Connectivity; Lumping; Splitting; Genetics; Growth;
   Hydrodynamic model; Tagging}},
Keywords-Plus = {{FISHERIES MANAGEMENT; STOCK IDENTIFICATION; FISH; VALIDATION; BUOYANCY;
   GENETICS; GENOMICS; EGGS}},
Research-Areas = {{Marine \& Freshwater Biology; Oceanography}},
Web-of-Science-Categories  = {{Marine \& Freshwater Biology; Oceanography}},
Author-Email = {{clu@aqua.dtu.dk}},
ORCID-Numbers = {{Ulrich, Clara/0000-0001-7598-2051}},
Funding-Acknowledgement = {{Danish Ministry for Food, Agriculture and Fisheries {[}33010-12-a-0253];
   European Union via the European Fisheries Fund {[}33010-12-a-0253]}},
Funding-Text = {{The research leading to this publication has received funding from both
   the Danish Ministry for Food, Agriculture and Fisheries and the European
   Union via the European Fisheries Fund contract no. 33010-12-a-0253. We
   thank Jose Martin Pujolar for assistance with genetic data analyses and
   Kerstin Geitner for GIS support, as well as the Danish Fishermen's
   Association for the valuable exchanges throughout the project.}},
Number-of-Cited-References = {{55}},
Times-Cited = {{0}},
Usage-Count-Last-180-days = {{12}},
Usage-Count-Since-2013 = {{12}},
Journal-ISO = {{J. Sea Res.}},
Doc-Delivery-Number = {{EJ1WH}},
Unique-ID = {{ISI:000393000500002}},
OA = {{No}},
DA = {{2017-08-17}},
}

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Biological evidence of population mixing","journal":"JOURNAL OF SEA RESEARCH","year":"2017","volume":"120","pages":"13-23","month":"FEB","abstract":"A multi-disciplinary study was conducted to clarify stock identity and connectivity patterns in the populations of European plaice (Pleuronectes platessa) in the Skagerrak-Kattegat transition area between the Eastern North Sea and the Baltic Sea. Five independent biological studies Were carried out in parallel. Genetic markers suggested the existence of different genetic populations in the transition area. Growth backcalculation with otoliths resulted in significant although limited differences in growth rates between North Sea and Skagerrak, indicating weak differentiation or important mixing. Hydrogeographical drift modelling suggested that some North Sea juveniles could settle along the coast line of the Skagerrak and the Kattegat. Tagging data suggested that both juveniles and adult fish from the North Sea perform feeding migrations into Skagerrak in summer/autumn. Finally, survey data suggested that Skagerrak also belongs to the area distribution of North Sea plaice. The outcomes of the individual studies were then combined into an overall synthesis. The existence of some resident components was evidenced, but it was also demonstrated that North Sea plaice migrate for feeding into Skagerrak and might constitute a large share of the catches in this area. The mixing of different populations within a management area has implications for stock assessment and management. Choice must be made to either lump or split the populations, and the feasibility and constraints of both options are discussed. The outcomes of this work have directly influenced the management decisions in 2015. (C) 2016 Elsevier B.V. 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We thank Jose Martin Pujolar for assistance with genetic data analyses and Kerstin Geitner for GIS support, as well as the Danish Fishermen's Association for the valuable exchanges throughout the project.","number-of-cited-references":"55","times-cited":"0","usage-count-last-180-days":"12","usage-count-since-2013":"12","journal-iso":"J. Sea Res.","doc-delivery-number":"EJ1WH","unique-id":"ISI:000393000500002","oa":"No","da":"2017-08-17","bibtex":"@article{ ISI:000393000500002,\nAuthor = {Ulrich, Clara and Hemmer-Hansen, Jakob and Boje, Jesper and Christensen,\n Asbjorn and Hussy, Karin and Sun, Hailu and Clausen, Lotte Worsoe},\nTitle = {{Variability and connectivity of plaice populations from the Eastern\n North Sea to the Baltic Sea, part II. Biological evidence of population\n mixing}},\nJournal = {{JOURNAL OF SEA RESEARCH}},\nYear = {{2017}},\nVolume = {{120}},\nPages = {{13-23}},\nMonth = {{FEB}},\nAbstract = {{A multi-disciplinary study was conducted to clarify stock identity and\n connectivity patterns in the populations of European plaice\n (Pleuronectes platessa) in the Skagerrak-Kattegat transition area\n between the Eastern North Sea and the Baltic Sea. Five independent\n biological studies Were carried out in parallel. Genetic markers\n suggested the existence of different genetic populations in the\n transition area. Growth backcalculation with otoliths resulted in\n significant although limited differences in growth rates between North\n Sea and Skagerrak, indicating weak differentiation or important mixing.\n Hydrogeographical drift modelling suggested that some North Sea\n juveniles could settle along the coast line of the Skagerrak and the\n Kattegat. 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