Performance of farmed, hybrid, and wild Atlantic salmon (<i>Salmo salar</i>) families in a natural river environment

DOI Web Site Web Site 被引用文献3件
  • Øystein Skaala
    Institute of Marine Research, P.O. Box 1870 Nordnes, N-5817 Bergen, Norway.
  • Kevin A. Glover
    Institute of Marine Research, P.O. Box 1870 Nordnes, N-5817 Bergen, Norway.
  • Bjørn T. Barlaup
    Uni Research, Thor Møhlensgt 49b, N-5006 Bergen, Norway.
  • Terje Svåsand
    Institute of Marine Research, P.O. Box 1870 Nordnes, N-5817 Bergen, Norway.
  • Francois Besnier
    Institute of Marine Research, P.O. Box 1870 Nordnes, N-5817 Bergen, Norway.
  • Michael M. Hansen
    Department of Biosciences, Aarhus University, Ny Munkegade 114-116, DK-8000 Aarhus C, Denmark.
  • Reidar Borgstrøm
    Department of Ecology and Natural Resource Management, The Norwegian University of Life Sciences, P.O. Box 5003, N-1432 Aas, Norway.
  • Ian Fleming
    editor

書誌事項

公開日
2012-12
権利情報
  • http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining
DOI
  • 10.1139/f2012-118
公開者
Canadian Science Publishing

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説明

<jats:p> Survival, growth, and diet were compared for farmed, hybrid, and wild Atlantic salmon (Salmo salar) families from the eyed egg to the smolt stage in River Guddalselva, Hardangerfjord, Norway. All individuals that survived until the smolt stage were captured in a Wolf trap and identified to one of the 69 experimental families using microsatellite markers. Survival of farmed salmon progeny was significantly lower than that of hybrids and wild progeny. However, survival varied considerably, from 0.17% to 6.4%, among farmed families. Egg size had an important influence on survival. Half-sib hybrid families with a farmed mother had higher survival when fathered by wild salmon than by farmed salmon. The overall relative survival of farmed families compared with that of their hybrid half-sib families fell from 0.86 in the second cohort to 0.62 in the last cohort with increasing fish density. Smolts of farmed parents showed significantly higher growth rates than wild and hybrid smolts. The overlap in diet among types of crosses demonstrates competition, and farm and hybrid progeny therefore will reduce the river’s capacity for production of wild salmon. </jats:p>

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