| Autor: |
Huusko, Ari, Nikula, Raisa, Tanhuanpää, Pirjo, Koljonen, Marja‐Liisa, Leinonen, Tuomas |
| Předmět: |
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| Zdroj: |
Fisheries Management & Ecology; Apr2024, Vol. 31 Issue 2, p1-12, 12p |
| Abstrakt: |
Effective management of migrating fish stocks requires an understanding of population structure and each stock's contribution to the fishery. Water bodies spanning across national borders pose a particular challenge. We investigated the genetic structure of 13 adfluvial brown trout populations from natal rivers and conducted a genetic mixed‐stock analysis of brown trout from the cross‐border Lake Pyaozero Basin in eastern Fennoscandia, using 16 microsatellite loci. Our analysis revealed a clear genetic structure of three distinct geographic groups, consisting of river‐specific populations. The Western and Southern groups, which included 11 rivers, contributed over 90% to the mixed stock in the lacustrine rearing area. This mixed stock of several river‐specific subpopulations renders poorly managed fishing in the area a significant threat to the entire native adfluvial brown trout population complex. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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