Blar i forfatter "Fossøy, Frode"

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    • Finding the needle in the haystack: Comparison of methods for salmon louse enumeration in plankton samples 

      Bui, Samantha; Dalvin, Sussie; Vågseth, Tone; Oppedal, Frode; Fossøy, Frode; Brandsegg, Hege; Jacobsen, Ása; Nordi, Gunnvør á; Fordyce, Mark; Michelsen, Helena Kling; Finstad, Bengt; Skern-Mauritzen, Rasmus (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-03-07)
      The economic and social implications of salmon louse (Lepeophtheirus salmonis) epidemics in salmon aquaculture drive focus of the dispersal dynamics of the planktonic larval stages. The vast spatial scale and high connectivity of the marine environment creates difficult conditions to monitor the infective planktonic louse stage, whereby the number of samples required for a representative description ...

    • Predator–prey interactions in the Arctic: DNA metabarcoding reveals that nestling diet of snow buntings reflects arthropod seasonality 

      Stolz, Christian; Varpe, Øystein; Ims, Rolf Anker; Sandercock, Brett Kevin; Stokke, Bård Gunnar; Fossøy, Frode (Journal article; Tidsskriftartikkel, 2023-07-06)
      Tundra arthropods are of considerable ecological importance as a seasonal food source for many arctic-breeding birds. Dietary composition and food preferences are rarely known, complicating assessments of ecological interactions in a changing environment. In our field study, we investigated the nestling diet of snow buntings (Plectrophenax nivalis (L., 1758)) breeding in Svalbard. We collected fecal ...

    • When Older Males Sire More Ofspring—Increased Attractiveness or Higher Fertility? 

      Lifjeld, Jan Terje; Kleven, Oddmund; Fossøy, Frode; Jacobsen, Frode F.; Laskemoen, Terje; Rudolfsen, Geir; Robertson, Raleigh J. (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-04-23)
      In birds with extrapair mating, older males usually have higher fertilization success than younger males. Two hypotheses can potentially explain this pattern: 1) females prefer older, and often more ornamented males, or 2) older males invest more in reproduction and fertility than younger males. Here we studied factors associated with age-related male fertilization success in a population of barn ...