Blar i Bergen Open Research Archive på forfatter "Varpe, Øystein"
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Temperature-dependent egg production and egg hatching rates of small egg-carrying and broadcast-spawning copepods Oithona similis, Microsetella norvegica and Microcalanus pusillus
Barth-Jensen, Coralie Marie Christine; Koski, Marja; Varpe, Øystein; Glad, Peter; Wangensteen, Owen Simon; Præbel, Kim; Svensen, Camilla (Journal article; Peer reviewed, 2020)Reproductive rates of copepods are temperature-dependent, but poorly known for small copepods at low temperatures, hindering the predictions of population dynamics and secondary production in high-latitude ecosystems. We ... -
Timing of Calanus finmarchicus diapause in stochastic environments
Bandara, Kanchana; Varpe, Øystein; Maps, Frédéric; Ji, Rubao; Eiane, Ketil; Tverberg, Vigdis (Journal article; Peer reviewed, 2021)In environments with strong seasonality, many herbivorous zooplankton remain active only during the productive season and undergo a period of inactivity and suppressed development termed ‘diapause’ during the unproductive ... -
Two hundred years of zooplankton vertical migration research
Bandara, Kanchana; Varpe, Øystein; Wijewardene, Lishani; Tverberg, Vigdis; Eiane, Ketil (Journal article; Peer reviewed, 2021)Vertical migration is a geographically and taxonomically widespread behaviour among zooplankton that spans across diel and seasonal timescales. The shorter-term diel vertical migration (DVM) has a periodicity of up to 1 ... -
Visual predation risk and spatial distributions of large Arctic copepods along gradients of sea ice and bottom depth
Langbehn, Tom; Aarflot, Johanna Myrseth; Freer, Jennifer J.; Varpe, Øystein (Journal article; Peer reviewed, 2023)Changes in the community size structure of Arctic copepods toward smaller and less fat individuals or species have been linked to environmental changes. The underpinning mechanisms are, however, poorly understood. We use ... -
What we do in the dark: Prevalence of omnivorous feeding activity in Arctic zooplankton during polar night
Kunisch, Erin; Graeve, Martin; Gradinger, Rolf Rudolf; Flores, Hauke; Varpe, Øystein; Bluhm, Bodil (Journal article; Peer reviewed, 2023)During the productive polar day, zooplankton and sea-ice amphipods fulfill a critical role in energy transfer from primary producers to higher trophic-level species in Arctic marine ecosystems. Recent polar night studies ...