Blar i Brage IMR på forfatter "Gjøsæter, Jakob"

Viser treff 41-60 av 113

    • Habitat selection and inter year class interactions of young cod (Gadus morhua) in aquaria. In: Flødevigen rapportserie no 1, 1987 

      Gjøsæter, Jakob (Flødevigen rapportserie, Research report, 1987)
      Groups of five small (12 - 18 cm) cod were kept in aquaria with two compartments, one with sand and one with stones and algae. When alone, the small fish usually spent most of the time in the compartment with stones and ...

    • Habitat selection of juvenile cod (Gadus morhua), whiting (Merlangus merlangius) and some littoral fish in an aquarium. In: Flødevigen rapportserie no 1, 1987 

      Gjøsæter, Jakob (Flødevigen rapportserie, Research report, 1987)
      Experiments were conducted to study the habit at selection of juvenile cod Gadus morhua, juvenile whiting merlangus merlangius, black goby Gobius niger, great pipefish Syngnathus acus, sand eel Ammodytes tobianus, ...

    • Half-year report 1987 of the project "Cultivation of catfish" 

      Moksness, Erlend; Gjøsæter, Jakob (Working paper, 1987)

    • Influence of oceanic factors on Anguilla anguilla (L.) over the twentieth century in coastal habitats of the Skagerrak, southern Norway 

      Durif, Caroline M.F.; Gjøsæter, Jakob; Vøllestad, Leif Asbjørn (Journal article; Peer reviewed, 2010-08-26)
      The European eel (Anguilla anguilla L.) is distributed all over Europe, but reproduction takes place in the Atlantic Ocean, in the Sargasso Sea. The population has been undergoing a steady decline since the 1980s. The eel ...

    • 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 ...

    • Kunnskapsstatus leppefisk : Utfordringer i et økende fiskeri 

      Espeland, Sigurd Heiberg; Nedreaas, Kjell Harald; Mortensen, Stein H.; Skiftesvik, Anne Berit; Agnalt, Ann-Lisbeth; Durif, Caroline M.F.; Harkestad, Lisbeth S.; Karlsbakk, Egil; Knutsen, Halvor; Thangstad, Trond; Jørstad, Knut Eirik; Bjordal, Åsmund; Gjøsæter, Jakob (Fisken og havet;7-2010, Research report, 2010-11-15)
      Over the past few years there has been a rapid increase in the use of wrasses as cleanerfish for sealice on salmon farms. During 2010, the landed catch of wrasse was 440 tons, more than twice the 2009 catch and nearly ten ...

    • Kyst og havbruk 2005 

      Boxaspen, Karin; Agnalt, Ann-Lisbeth; Gjøsæter, Jakob; Jørgensen, Lis Lindal; Skiftesvik, Anne Berit (Fisken og havet, særnummer;2-2005, Research report, 2005-04)

    • Lectures in fish population dynamics 

      Gjøsæter, Jakob; Dalpadado, Padmini (Lecture, 1985)

    • Life history and ecology of Maurolicus muelleri (Gonostomatidae) in Norwegian waters 

      Gjøsæter, Jakob (Fiskeridirektoratets skrifter, Serie Havundersøkelser, Research report, 1981)

    • Life history and ecology of the myctophid fish Notoscopelus elongatus kroeyeri from the northeast Atlantic 

      Gjøsæter, Jakob (Fiskeridirektoratets skrifter, Serie Havundersøkelser, Research report, 1981)

    • Litteratur om biologiske aspekter av termisk forurensning 

      Gjøsæter, Jakob (Others, 1973-10-06)

    • Long-term fluctuations in cod and pollack along the Norwegian Skagerrak coast 

      Fromentin, Jean-Marc; Stenseth, Nils Christian; Gjøsæter, Jakob; Johannessen, Tore; Planque, Benjamin (Journal article; Peer reviewed, 1998-02-12)
      We tested whether the long-term fluctuations in abundance of 0-group cod Gadus morhua and pollack Pollachius pollachius sampled from 1919 to 1994 at 38 stations along the Norwegian Skagerrak coast might be related to the ...

    • Long-term movement patterns of coastal cod (Gadus morhua) 

      Espeland, Sigurd Heiberg; Gjøsæter, Jakob; Stenseth, Nils Christian (ICES CM Documents;2001/L:18, Working paper, 2001)
      Movement patterns were studied by means of hydroacustic telemetry along the Norwegian Skagerrak coast. Ultrasonic transmitters was surgically implanted in 10 coastal cod, and released in the same area as they where caught. ...

    • A long-term perspective on the Chrysochromulina bloom on the Norwegian Skagerrak coast 1988: a catastrophe or an innocent incident? 

      Gjøsæter, Jakob; Lekve, Kyrre; Stenseth, Nils Christian; Leinaas, Hans Petter; Christie, Hartvig; Dahl, Einar; Danielssen, Didrik S.; Edvardsen, Bente; Olsgard, Frode; Paasche, Eystein (Journal article; Peer reviewed, 2000-11-22)
      The long-term effects of the 1988 algal bloom (Chrysochromulina polylepis Manton et Parke) along the Norwegian Skagerrak coast are evaluated and discussed on the basis of several monitoring programmes. Effects on individual ...

    • 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 ...

    • Mesopelagic fish off Mozambique 

      Gjøsæter, Jakob; Beck, Inger Marie (Fiskeridirektoratets skrifter, Serie Havundersøkelser, Research report, 1981)
      The mesopelagic fauna off Mozambique was studied on five cruises of R.V. "Dr. Fridtjof Nansen" during 1977 and 1978. It primarily consisted of Myctophids. At most stations, Benthosema fibulatum or Diaphus spp. were ...

    • Miljøtilstanden i Ytre Oslofjorden 

      Aure, Jan; Berge, Jon Arthur; Beyer, Fredrik; Danielssen, Didrik S.; Enersen, Kate; Enersen, Svein Erik; Gjøsæter, Jakob; Johannessen, Einar; Rygg, B.; Torstensen, Else; Tveite, Stein (Interne notat;Nr. 13-1997, Working paper, 1997-12-02)
      Undersøkelser med bunntrål, akustikk og prøvetaking med grabb bIe gjennomført med Michael Sars i perioden 2-3 november og G.M.Dannevig i perioden 12-19 november 1997. Materialet fra bunntrål og akustiske survey som er ...

    • Morphological and ecological studies of Clavella adunca (Copepoda, Lernaeopodidae) on polar cod, Boreogadus saida 

      Gjøsæter, Jakob (Journal article; Peer reviewed, 1987-12-15)
      Clavella adunca (stroem, 1762) from the Barents Sea polar cod was studied. The general appearance and morphology of the appendages were similar to C. adunca f. iadda LEIGH-SHARPE, but the size of the trunk and cephalothorax ...

    • New perspectives on fish movement: kernel and GAM smoothers applied to a century of tagging data on coastal Atlantic cod 

      Espeland, Sigurd Heiberg; Olsen, Esben Moland; Knutsen, Halvor; Gjøsæter, Jakob; Danielssen, Didrik S.; Stenseth, Nils Christian (Journal article; Peer reviewed, 2008-12-09)
      Tagging–recovery studies have been used successfully on many occasions, and the data analysed in a variety of ways with respect to fish movement. Here we provide a synoptic account of useful statistical techniques for ...