Blar i forfatter "Choquet, Marvin"

Viser treff 1-6 av 6

    • Can morphology reliably distinguish between the copepods Calanus finmarchicus and C. glacialis, or is DNA the only way? 

      Choquet, Marvin; Kosobokova, Ksenia; Kwaśniewski, Sławomir; Hatlebakk, Maja Karoline Viddal; Dhanasiri, Anusha Krishanthi Shyama; Melle, Webjørn Raunsgård; Daase, Malin; Svensen, Camilla; Søreide, Janne; Hoarau, Galice Guillaume (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-02-10)
      Copepods of the genus <i>Calanus</i> play a key role in marine food webs as consumers of primary producers and as prey for many commercially important marine species. Within the genus, <i>Calanus glacialis</i> and <i>Calanus finmarchicus</i> are considered indicator species for Arctic and Atlantic waters, respectively, and changes in their distributions are frequently used as a tool to track climate ...

    • Molecular tools prove little auks from Svalbard are extremely selective for Calanus glacialis even when exposed to Atlantification 

      Balazy, Kaja; Trudnowska, Emilia; Wojczulanis-Jakubas, Katarzyna; Jakubas, Dariusz; Præbel, Kim; Choquet, Marvin; Brandner, Melissa Michelle; Schultz, Mads; Bitz-Thorsen, Julie; Boehnke, Rafał; Szeligowska, Marlena; Descamps, Sebastien; Strøm, Hallvard; Blachowiak-Samolyk, Kasia (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-08-22)
      Two Calanus species, C. glacialis and C. finmarchicus, due to different life strategies and environmental preferences act as an ecological indicators of Arctic Atlantification. Their high lipid content makes them important food source for higher trophic levels of Arctic ecosystems including the most abundant Northern Hemisphere's seabird, the little auk (Alle alle). Recent studies indicate a critical ...

    • New insights into the biology of Calanus spp. (Copepoda) males in the Arctic 

      Daase, Malin; Kosobokova, Ksenia; Last, Kim S; Cohen, Jonathan H.; Choquet, Marvin; Hatlebakk, Maja Karoline Viddal; Søreide, Janne (Journal article; Tidsskriftartikkel; Peer reviewed, 2018)
      Adult males of <i>Calanus</i> copepods in the Arctic are mainly observed between late autumn and late spring, and are seldom recorded during summer. Due to logistical constraints, there are still relatively few studies on zooplankton in high-latitude regions during the winter, and subsequently, little is known about <i>Calanus</i> males. Here, we present data on abundance, spatial distribution, ...

    • Photoperiodism and overwintering in boreal and sub-Arctic Calanus finmarchicus populations 

      Coguiec, Estelle; Last, Kim S.; Cohen, Jonathan H.; Hobbs, Laura; Choquet, Marvin; Ershova, Elizaveta; Berge, Jørgen; Daase, Malin (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-06-08)
      The copepod Calanus finmarchicus, a key species in the North Atlantic, generally spends the non-productive season by descending into deep waters and entering diapause, a physiological state characterized by reduced metabolism and arrested development. In the open ocean, overwintering depths are below 600 m, where temperature and light conditions are favourable to initiate diapause. However, C. ...

    • The phylogeography and ecology of Oligobrachia frenulate species suggest a generalist chemosynthesis-based fauna in the arctic 

      Sen, Arunima; Andersen, Liselotte W.; Kjeldsen, Kasper U.; Michel, Loïc N.; Hong, Wei-Li; Choquet, Marvin; Rasmussen, Tine Lander (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-03-02)
      We used ancient DNA (aDNA) extraction methods to sequence museum voucher samples of Oligobrachia webbi, a frenulate siboglinid polychaete described from a northern Norwegian fjord over fifty years ago. Our sequencing results indicate a genetic match with the cryptic seep species, Oligobrachia haakonmosbiensis (99% pairwise identity for 574 bp mtCOI fragments). Due to its similarity with O. webbi, ...

    • Remote sensing of zooplankton swarms 

      Basedow, Sünnje Linnéa; McKee, David; Lefering, Ina; Gislason, Astthor; Daase, Malin; Trudnowska, Emilia; Egeland, Einar Skarstad; Choquet, Marvin; Falk-Petersen, Stig (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-01-24)
      Zooplankton provide the key link between primary production and higher levels of the marine food web and they play an important role in mediating carbon sequestration in the ocean. All commercially harvested fish species depend on zooplankton populations. However, spatio-temporal distributions of zooplankton are notoriously difficult to quantify from ships. We know that zooplankton can form large ...