• Activity patterns of wild European lobster Homarus gammarus in coastal marine reserves: implications for future reserve design 

      Moland, Even; Olsen, Esben Moland; Knutsen, Halvor; Knutsen, Jan Atle; Enersen, Svein Erik; André, Carl; Stenseth, Nils Christian (Journal article; Peer reviewed, 2011-05-16)
      European lobster Homarus gammarus in Norway has been in decline over the last 30 to 40 yr, and the species is currently red listed according to International Union for Conservation of Nature criteria. In 2006, experimental ...
    • Aktiv forvaltning av marine ressurser – lokalt tilpasset forvaltning 

      Espeland, Sigurd Heiberg; Kleiven, Alf Ring; Moland, Even; Knutsen, Jan Atle (Rapport fra Havforskningen;Nr. 34-2014, Working paper, 2014-12)
    • Aktiv forvaltning av marine ressurser – lokalt tilpasset forvaltning. Årsrapport 2015 

      Espeland, Sigurd Heiberg; Kleiven, Alf Ring; Moland, Even; Knutsen, Jan Atle (Rapport fra Havforskningen;21-2015, Working paper, 2015)
    • Analysis of European eel (Anguilla anguilla) time series in Norway 

      Durif, Caroline M.F.; Knutsen, Jan Atle; Johannessen, Tore; Vøllestad, Leif Asbjørn (Fisken og havet, Research report, 2008)
      The European eel Anguilla anguilla is found all over Europe and in extremely diverse habitats both in freshwater and saltwater systems. Its life strategy also varies, from catadromous to a strictly marine life cycle. Eels ...
    • Beskatning av sjøørret i sjø på Skagerrakkysten og i Oslofjorden (Et forprosjekt) 

      Gjøsæter, Jakob; Knutsen, Jan Atle; Knutsen, Henry; Aass, Asbjørn; Sollie, Aadne (Fisken og havet, Research report, 1996)
      The basis for the pilot project was today's official fishing statistics which show a catch of sea trout in the sea in the order of size 1 tonne/year for the Skagerrak Coast and the Oslofjord. This is not in accordance ...
    • Biologiske verdier i sjø i Tvedestrand kommune 

      Knutsen, Jan Atle; Knutsen, Halvor; Paulsen, Øystein; Kristensen, Øystein; Vike, Svein (Fisken og havet;7-2003, Research report, 2003)
      Norsk: I løpet av de siste 30 år har det foregått en utstrakt kartlegging og verdifastsetting av naturområder på land i Norge. Ute i sjøen derimot, mangler det tilsvarende stedsspesifikk kunnskap om hvor de biologiske ...
    • Egg distribution, bottom topography and small-scale cod population structure in a coastal marine system 

      Knutsen, Halvor; Olsen, Esben Moland; Ciannelli, Lorenzo; Espeland, Sigurd Heiberg; Knutsen, Jan Atle; Simonsen, Jan Henrik; Skreslet, Stig; Stenseth, Nils Christian (Journal article; Peer reviewed, 2007-03-12)
      Coastal marine species with pelagic egg and larval stages, such as the Atlantic cod Gadus morhua, can be structured into genetically distinct local populations on a surprisingly small geographic scale considering their ...
    • En ”levende skjærgård” forutsetter vern av biologiske verdier i sjøen 

      Knutsen, Jan Atle (Havforskningsnytt, Working paper, 2002)
    • Experiences and Activities in Norway and Europe, Based on Studies of the European Lobster Homarus gammarus 

      van der Meeren, Gro; Knutsen, Halvor; Knutsen, Jan Atle; Agnalt, Ann-Lisbeth (Conference object, 2010-01-04)
    • Forekomst og økologi til torsk, skrubbe, sjøørret og pelagisk fisk i Grenlandsfjordene 

      Bergstad, Odd Aksel; Knutsen, Jan Atle (Fisken og havet, Research report, 2000)
      Information on occurrence and feeding ecology of cod (Gadus morhua), flounder (Platichtys Jesus), anadromous brown trout (Salmo trutta), and epipelagic fish in the Grenland fjords (SE Norway) is reviewed. Emphasis in ...
    • Frekvens av embryonal feilutvikling hos sild (Clupea harengus) fra en dioksinforurenset fjord (Frierfjorden, Telemark) 

      Bergstad, Odd Aksel; Knutsen, Jan Atle (Fisken og havet, Research report, 2004)
      As an element of comprehensive studies of effects on marine biota of dioxin pollution under the project "Dioxins in the Grenland fjords" (2000-2003), a comparative incubation experiment was carried out with herring (Clupea ...
    • Havforskningsrapporten 2010 

      Gjøsæter, Harald; Haug, Tore; Hauge, Marie; Karlsen, Ørjan; Knutsen, Jan Atle; Røttingen, Ingolf; Skilbrei, Ove; Sunnset, Beate Hoddevik (Fisken og havet, særnummer;1-2010, Research report, 2010)
    • Hummerreservater på Skagerrakkysten 

      Knutsen, Jan Atle (Havforskningsnytt, Working paper, 2007)
      Nå er områdevern innført for å gjenoppbygge den norske hummerbestanden, som det har vist seg vanskelig å beskytte ved hjelp av tradisjonelle reguleringstiltak.
    • Infection of wild fishes by the parasitic copepod Caligus elongatus on the south east coast of Norway 

      Heuch, P. A.; Øines, Ø.; Knutsen, Jan Atle; Schram, Thomas A. (Journal article; Peer reviewed, 2007-09-14)
      Natural Caligus elongatus Nordmann infections of wild coastal fishes on the Norwegian south east coast were monitored at various times of the year from 2002 to 2004. The prevalence for all coastal fish (n = 4427) pooled ...
    • Kartlegging av gyteplasser og sonderende oksygenmålinger i utvalgte fjorder i Risør, Tvedestrand og Lillesand kommune 

      Knutsen, Jan Atle; Bergstad, Odd Aksel; Gjøsæter, Jakob; Enersen, Svein Erik; Omli, Lena (Fisken og havet, Research report, 2000)
      This pilot project was initiated to compile and map old fishermen's local information on spawning areas of cod and other commercial fishes along the Norwegian Skagerrak Coast. Interviews revealed that fishermen had good ...
    • Kyst og havbruk 2009 

      Agnalt, Ann-Lisbeth; Bakketeig, Ingunn; Haug, Tore; Knutsen, Jan Atle; Opstad, Ingegjerd (Fisken og havet, særnummer, Research report, 2009-04)
    • Lobster reserves in coastal Norway - The process towards establishment 

      Knutsen, Jan Atle; Pettersen, Alf Ring; Moland, Even; Olsen, Esben Moland; Grundvig, Kari (Conference object, 2007-06-11)
    • Mapping Biological Resources in the Coastal Zone: An Evaluation of Methods in a Pioneering Study from Norway 

      Knutsen, Jan Atle; Knutsen, Halvor; Rinde, Eli; Christie, Hartvig; Bodvin, Torjan (Journal article; Peer reviewed, 2010)
      For many years, the planning and management 8 of terrestrial areas has been supported by a detailed 9 knowledge of the distribution of habitats and their associ- 10 ated species. However, the detailed mapping of biological ...
    • Marine indikatorer 

      van der Meeren, Gro; Øigård, Tor Arne; Øien, Nils; Nilssen, Kjell Tormod; Oug, Eivind; Sunnanå, Knut; Jakobsen, Tore; Mehl, Sigbjørn; Kvamme, Cecilie; Torstensen, Else; Stenevik, Erling Kåre; Planque, Benjamin; Helle, Gunnar; Gjøsæter, Jakob; Skiftesvik, Anne Berit; Aglen, Asgeir; Johannessen, Tore; Dommasnes, Are; Naustvoll, Lars-Johan; Moy, Frithjof E.; Falkenhaug, Tone; Melle, Webjørn; Knutsen, Tor; Eriksen, Elena; Jørgensen, Lis Lindal; Fosså, Jan Helge; Bannister, Raymond; Buhl-Mortensen, Lene; Buhl-Mortensen, Pål; Strand, Øivind; Søvik, Guldborg; Jelmert, Anders; Knutsen, Jan Atle; Enersen, Svein Erik; Edvardsen, Hanne; Kroglund, Tone; Pedersen, Atle; Eikrem, Wenche; Bekkby, Trine; Tveite, Stein (DN-utredning;4-2010, Chapter, 2010-09)
      The Nature Index (NI) is established to get an overview of the state and development of biodiversity within the major ecosystems of Norway. It includes marine, limnic and terrestrial ecosystems. The aim of the index is to ...
    • Marine indikatorer 

      van der Meeren, Gro; Øigård, Tor Arne; Øien, Nils; Nilssen, Kjell Tormod; Oug, Eivind; Sunnanå, Knut; Jakobsen, Tore; Mehl, Sigbjørn; Kvamme, Cecilie; Torstensen, Else; Stenevik, Erling Kåre; Planque, Benjamin; Helle, Gunnar; Gjøsæter, Jakob; Skiftesvik, Anne Berit; Aglen, Asgeir; Johannessen, Tore; Dommasnes, Are; Naustvoll, Lars-Johan; Moy, Frithjof E.; Falkenhaug, Tone; Melle, Webjørn; Knutsen, Tor; Eriksen, Elena; Jørgensen, Lis Lindal; Fosså, Jan Helge; Bannister, Raymond; Buhl-Mortensen, Lene; Buhl-Mortensen, Pål; Strand, Øivind; Søvik, Guldborg; Jelmert, Anders; Knutsen, Jan Atle; Enersen, Svein Erik; Edvardsen, Hanne; Kroglund, Tone; Pedersen, Atle; Eikrem, Wenche; Bekkby, Trine; Tveite, Stein (DN-utredning;4-2010, Chapter, 2010-09)
      The Nature Index (NI) is established to get an overview of the state and development of biodiversity within the major ecosystems of Norway. It includes marine, limnic and terrestrial ecosystems. The aim of the index is to ...