Blar i forfatter "Weslawski, Jan Marcin"

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    • Age class composition and growth of Atlantic cod (Gadus morhua) in the shallow water zone of Kongsfjorden, Svalbard 

      Brand, Markus; Spotowitz, Lisa; Mark, Felix; Berge, Jørgen; Langhelle, Erlend; Weslawski, Jan Marcin; Godiksen, Jane Aanestad; Fischer, Philipp (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-12-26)
      Although Atlantic cod has been observed in Svalbard waters since the 1880s, knowledge about the presence in the Arctic shallow water zone is limited. The regular catch of juvenile Atlantic cod in Kongs orden since 2008 is in line with an overall northward shift of boreal fish species toward the Arctic. This is the first study showing the age class composition, growth rates, and stomach content ...

    • In the dark: a review of ecosystem processes during the Arctic polar night 

      Berge, Jørgen; Renaud, Paul; Darnis, Gérald; Cottier, Finlo; Last, Kim; Gabrielsen, Tove M.; Johnsen, Geir; Seuthe, Lena; Weslawski, Jan Marcin; Leu, Eva; Moline, Mark A.; Nahrgang, Jasmine; Søreide, Janne; Varpe, Øystein; Lønne, Ole Jørgen; Daase, Malin; Falk-Petersen, Stig (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-08-28)
      Several recent lines of evidence indicate that the polar night is key to understanding Arctic marine ecosystems. First, the polar night is not a period void of biological activity even though primary production is close to zero, but is rather characterized by a number of processes and interactions yet to be fully understood, including unanticipated high levels of feeding and reproduction in a ...

    • Zooplankton in Svalbard fjords on the Atlantic–Arctic boundary 

      Gluchowska, Marta; Kwasniewski, Slawomir; Prominska, Agnieszka; Olszewska, Anna; Goszczko, Ilona; Falk-Petersen, Stig; Hop, Haakon; Weslawski, Jan Marcin (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-07-01)
      Zooplankton abundance and community structures were studied in three west Spitsbergen fjords at the beginning of the warm phase, which seem to have entered in 2006. Sampling was conducted in summer 2007 at stations distributed along transects in Hornsund, Isfjorden and Kongsfjorden. Variations in zooplankton standing stocks and community structures (assessing taxonomic diversity and zoogeographical ...