Browsing Bergen Open Research Archive by Author "Skjæraasen, Jon Egil"

Now showing items 1-5 of 5

    • Large annual variation in the amount of skipped spawning for female Northeast Arctic haddock Melanogrammus aeglefinus 

      Skjæraasen, Jon Egil; Korsbrekke, Knut; Dingsør, Gjert Endre; Langangen, Øystein; Opdal, Anders Frugård; Jørgensen, Christian (Journal article; Peer reviewed, 2020-10)
      Although the phenomenon of skipped spawning has been described in numerous fishes, time-series are scarce. We used the presence of post-ovulatory follicles in histological gonad slides from females not developing oocytes ...

    • Skipped spawning in Northeast Arctic haddock Melanogrammus aeglefinus 

      Skjæraasen, Jon Egil; Korsbrekke, Knut; Nilsen, Trygve; Fonn, Merete; Kjesbu, Olav Sigurd; Dingsør, Gjert Endre; Nash, Richard David Marriott (Peer reviewed; Journal article, 2015-04-22)
      Large interannual fluctuations in the numbers of offspring joining a teleost population are common, yet factors affecting offspring production, a key driver of fish population size and demography, are often poorly understood. ...

    • Sub-populations of coastal cod with different behaviour and life-history strategies 

      Salvanes, Anne Gro Vea; Skjæraasen, Jon Egil; Nilsen, Trygve (Peer reviewed; Journal article, 2004-02-19)
      This study provides evidence of countergradient variations in life-history traits among coastal cod Gadus morhua off the Norwegian coast, suggesting the existence of sub-populations. One-yr-old wild-caught individuals from ...

    • Trade-offs between growth and reproduction in wild Atlantic cod 

      Folkvord, Arild; Jørgensen, Christian; Korsbrekke, Knut; Nash, Richard David Marriott; Nilsen, Trygve; Skjæraasen, Jon Egil (Peer reviewed; Journal article, 2014-04-08)
      Animals partition and trade off their resources between competing needs such as growth, maintenance, and reproduction. Over a lifetime, allocation strategies should result in distinct trajectories for growth, survival, and ...

    • Triploid Atlantic salmon and triploid Atlantic salmon × brown trout hybrids have better freshwater and early seawater growth than diploid counterparts 

      Fraser, Thomas; Lerøy, Hilde; Hansen, Tom Johnny; Skjæraasen, Jon Egil; Tronci, Valentina; Pinto Pedrosa, Cindy; Fjelldal, Per Gunnar; Nilsen, Tom Ole (Journal article; Peer reviewed, 2021)
      The use of reproductively sterile triploid salmonids would enhance the environmental sustainability of the aquaculture industry by preventing genetic exchange between escapees and wild conspecifics. To this end, we assessed ...