Browsing Brage IMR by Author "Nilsen, Trygve"

Now showing items 1-7 of 7

    • Environmental regulation of individual depth on a cod spawning ground 

      Meager, Justin J.; Skjæraasen, Jon Egil; Karlsen, Ørjan; Løkkeborg, Svein; Mayer, Ian; Michalsen, Kathrine; Nilsen, Trygve; Fernö, Anders (Journal article; Peer reviewed, 2012-12-13)
      Fine-scale characteristics of spawning grounds may provide the opportunity for cod Gadus morhua L. to regulate their external environment by adjusting their depth. Ultrasonic telemetry was used to study how the environment ...

    • Liver energy, atresia and oocyte stage influence fecundity regulation in Northeast Arctic cod 

      Skjæraasen, Jon Egil; Nash, Richard D.M.; Kennedy, James; Thorsen, Anders; Nilsen, Trygve; Kjesbu, Olav Sigurd (Journal article; Peer reviewed, 2010-04-08)
      Marine ecosystems are changing; global warming-induced increases in water temperatures and fishing have caused truncated age structures and small sizes at maturity in many stocks. This may affect both populations’ total ...

    • 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 (Journal article; Peer reviewed, 2015-04-22)

    • Stereological calibration of the profile method to quickly estimate atresia levels in fish 

      Kjesbu, Olav Sigurd; Fonn, Merete; Gonzáles, Barbara Dunia; Nilsen, Trygve (Journal article; Peer reviewed, 2010-05)
      The (physical) ‘disector method’, a frequently cited stereological technique, has so far received little attention within fish fecundity studies, although it can be used to provide unbiased, assumption-free data on levels ...

    • Stereological calibration of the profile method to quickly estimate atresia levels in fish 

      Kjesbu, Olav Sigurd; Fonn, Merete; Gonzáles, Barbara Dunia; Nilsen, Trygve (Journal article; Peer reviewed, 2010-05)
      The (physical) ‘disector method’, a frequently cited stereological technique, has so far received little attention within fish fecundity studies, although it can be used to provide unbiased, assumption-free data on levels ...

    • Timing and determination of potential fecundity in Atlantic cod (Gadus morhua) 

      Skjæraasen, Jon Egil; Nilsen, Trygve; Kjesbu, Olav Sigurd (Journal article; Peer reviewed, 2005)
      Studies using annual averages of lipid storage or estimated quality of the feeding season have shown that energy reserves influence egg production in Atlantic cod (Gadus morhua). However, vitellogenesis starts months ...

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

      Folkvord, Arild; Jørgensen, Christian; Korsbrekke, Knut; Nash, Richard D.M.; Nilsen, Trygve; Skjæraasen, Jon Egil (Journal article; Peer reviewed, 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 ...