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Temporally stable, weak genetic structuring in brackish water northern pike (Esox lucius) in the Baltic Sea indicates a contrasting divergence pattern relative to freshwater populations
Stockholms universitet, Naturvetenskapliga fakulteten, Zoologiska institutionen.ORCID-id: 0000-0003-3766-4970
Stockholms universitet, Naturvetenskapliga fakulteten, Zoologiska institutionen.ORCID-id: 0000-0003-3342-8479
Stockholms universitet, Naturvetenskapliga fakulteten, Zoologiska institutionen.ORCID-id: 0000-0001-9286-3361
Antal upphovsmän: 42017 (Engelska)Ingår i: Canadian Journal of Fisheries and Aquatic Sciences, ISSN 0706-652X, E-ISSN 1205-7533, Vol. 74, nr 4, s. 562-571Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Understanding spatiotemporal population genetic patterns is important for conservation management of ecologically and socioeconomically important species. This is particularly so in species-poor environments such as the brackish Baltic Sea. We examined over 600 northern pike (Esox lucius), a coastal predator and treasured sport fish, collected over major parts of the Baltic Sea coastline. We found low genetic divergence among populations, indicating a contrasting genetic structure of brackish water coastal spawners compared with previous reports on anadromous Baltic pike migrating up freshwater streams for spawning. A pattern of genetic isolation by distance either over shortest waterway or primarily along the mainland coast with islands as stepping stones suggested that gene flow is primarily taking place among neighboring populations, possibly with some migration over open water. Temporal data showed a stable genetic structure over a decade. Within a single sampling year, however, spatial divergence was larger during spawning than feeding season, indicating increased mixing of populations during the feeding season. Management should assure connectivity among brackish spawning grounds and large population sizes at identified core areas.

Ort, förlag, år, upplaga, sidor
2017. Vol. 74, nr 4, s. 562-571
Nationell ämneskategori
Biologiska vetenskaper
Identifikatorer
URN: urn:nbn:se:su:diva-143622DOI: 10.1139/cjfas-2016-0039ISI: 000398836600014OAI: oai:DiVA.org:su-143622DiVA, id: diva2:1103336
Tillgänglig från: 2017-05-30 Skapad: 2017-05-30 Senast uppdaterad: 2020-03-05Bibliografiskt granskad

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Av författaren/redaktören
Wennerström, LovisaRyman, NilsLaikre, Linda
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Zoologiska institutionen
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Canadian Journal of Fisheries and Aquatic Sciences
Biologiska vetenskaper

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