• 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 ...
    • In vitro toxicity of hydrocarbon pollutants 

      Knag, Anne Christine; Mayer, Ian; Verhaegen, S; Ropstad, E; Mjøs, S; Meier, Sonnich (Others, 2010-05)
    • Mating competition between farmed and wild cod Gadus morhua 

      Skjæraasen, Jon Egil; Meager, Justin J.; Karlsen, Ørjan; Mayer, Ian; Dahle, Geir; Rudolfsen, Geir; Fernö, Anders (Journal article; Peer reviewed, 2010-08-18)
      Increasing numbers of hatchery-produced fish entering marine environments has caused concern over potential fitness depressions in wild populations, yet no study has addressed the likelihood of hybridisation between farmed ...
    • Mechanisms regulating oocyte recruitment and skippedspawning in Northeast Arctic cod (Gadus morhua L.) 

      Skjæraasen, Jon Egil; Kennedy, James; Thorsen, Anders; Fonn, Merete; Strand, Bente; Mayer, Ian; Kjesbu, Olav Sigurd (Journal article; Peer reviewed, 2009-09)
      To examine mechanisms that affect fecundity, atresia and skipped spawning in Northeast Arctic cod (Gadus morhua L.), we conducted an experiment where wild-caught cod (>60 cm) kept under restricted food regimes were subjected ...
    • Mechanisms regulating oocyte recruitment and skippedspawning in Northeast Arctic cod (Gadus morhua L.) 

      Skjæraasen, Jon Egil; Kennedy, James; Thorsen, Anders; Fonn, Merete; Strand, Bente; Mayer, Ian; Kjesbu, Olav Sigurd (Journal article; Peer reviewed, 2009-09)
      To examine mechanisms that affect fecundity, atresia and skipped spawning in Northeast Arctic cod (Gadus morhua L.), we conducted an experiment where wild-caught cod (>60 cm) kept under restricted food regimes were subjected ...
    • Size Dependent Male Reproductive Tactic in the Two-Spotted Goby (Gobiusculus flavescens) 

      Utne-Palm, Anne Christine; Eduard, Kjartan; Jensen, Knut Helge; Mayer, Ian; Jakobsen, Per Johan (Journal article; Peer reviewed, 2015-12-07)
      Male investment in testes and sperm duct gland in the polygamous nest breeding two-spotted goby Gobiusculus flavescens (Fabricius) was investigated in relation to time in reproductive season and individual physical parameters. ...
    • Some characteristics of sperm motility in European hake (Merluccius merluccius, L., 1758) 

      Groison, A.-L.; Fauvel, C.; Suquet, M.; Kjesbu, Olav Sigurd; Le Coz, J.R.; Mayer, Ian; Cosson, J. (Journal article; Peer reviewed, 2010-09-17)
      The objective of this paper is to characterize some of the sperm motility parameters in European hake (Merluccius merluccius), which is considered to be a species with aquaculture potential. The total ATP, ADP and AMP ...
    • Sperm characteristics and competitive ability in farmed and wild cod 

      Skjæraasen, Jon Egil; Mayer, Ian; Meager, Justin J.; Rudolfsen, Geir; Karlsen, Ørjan; Haugland, Thomas; Kleven, Oddmund (Journal article; Peer reviewed, 2009-01-27)
      The development of cod aquaculture has raised concerns about its effect on wild stocks. One risk is hybridisation between escapees and wild cod, causing genetic introgression, and, potentially, fitness depressions in wild ...
    • The culturable intestinal microbiota of triploid and diploid juvenile Atlantic salmon (Salmo salar) - a comparison of composition and drug resistance 

      Cantas, Leon; Fraser, Thomas W. K.; Fjelldal, Per Gunnar; Mayer, Ian; Sørum, Henning (Journal article; Peer reviewed, 2011-11-17)
      Background With the increased use of ploidy manipulation in aquaculture and fisheries management this investigation aimed to determine whether triploidy influences culturable intestinal microbiota composition and bacterial ...