Browsing Brage IMR by Author "Naustvoll, Lars-Johan"
Now showing items 1-20 of 24
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Correcting for underestimation of microzooplankton grazing in bottle incubation experiments with mesozooplankton
Nejstgaard, Jens Christian; Naustvoll, Lars-Johan; Sazhin, Andrey (Journal article; Peer reviewed, 2001-10-18)Bottle incubation experiments are widely used in mesozooplankton grazing studies. However, we have shown here that traditional particle removal experiments with Calanus finmarchicus and C. helgolandicus as grazers on ... -
Extension of the match-mismatch hypothesis to predator-controlled systems
Durant, Joël M.; Hjermann, Dag Ø.; Falkenhaug, Tone; Gifford, Dian J.; Naustvoll, Lars-Johan; Sullivan, Barbara K.; Beaugrand, Grégory; Stenseth, Nils Christian (Journal article; Peer reviewed, 2013-01-31)Differential change in the phenology of predators and prey is a potentially important climate-mediated mechanism influencing populations. The match-mismatch hypothesis describes the effect of predator-prey population ... -
Grazing by the heterotrophic dinoflagellate Protoperidinium steinii on a Ceratium bloom
Olseng, Christine Daae; Naustvoll, Lars-Johan; Paasche, Eystein (Journal article; Peer reviewed, 2002-01-11)Variations in heterotrophic dinoflagellate populations at a station in the inner Oslofjord, Norway, were studied by sampling at ca 4 d intervals. Cells were concentrated from 1 l samples by filtration before being counted ... -
Kunnskap om marine naturressurser i Barentshavet sørøst
Fosså, Jan Helge; Aglen, Asgeir; Børsheim, Yngve; Chierici, Melissa; Eriksen, Elena; Hvingel, Carsten; Johannesen, Edda; Jørgensen, Lis Lindal; Knutsen, Tor; Naustvoll, Lars-Johan; Skern-Mauritzen, Mette; Sundet, Jan H.; Vikebø, Frode (Rapport fra Havforskningen;Nr. 21 - 2012, Working paper, 2012-06)The status of knowledge of the resources in the Southeastern Barents Sea is reported. The area is dominated by Atlantic watermasses flowing eastwards. The planktonic production is high and secure good feeding conditions ... -
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 ... -
Marine naturforhold og naturverdier i Færder nasjonalpark
Dahl, Einar; Knutsen, Jan Atle; Albretsen, Jon; Espeland, Sigurd Heiberg; Huserbråten, Mats Brockstedt Olsen; Knutsen, Halvor; Jelmert, Anders; Kleiven, Alf Ring; Moland, Even; Moy, Frithjof; Naustvoll, Lars-Johan; Olsen, Esben Moland; Thorbjørnsen, Susanna Huneide (Rapport fra Havforskningen;Nr. 3 - 2015, Working paper, 2015-02) -
Massedød av stillehavsøsters, Crassostrea gigas, i Sverige og Norge, september 2014
Mortensen, Stein; Bodvin, Torjan; Skår, Cecilie K.; Sælemyr, Lisbeth; Jelmert, Anders; Albretsen, Jon; Naustvoll, Lars-Johan (Rapport fra Havforskningen;Nr. 28-2014, Working paper, 2014-10-24) -
Miljøtokt i Skagerrak, Kattegat og østlige Nordsjøen [14/4 - 2/5, 2004]
Danielssen, Didrik S.; Naustvoll, Lars-Johan ([Toktrapport/Havforskningsinstituttet];Nr. 8 - 2004, Working paper, 2004) -
Miljøtokt i Skagerrak, Kattegat og østlige Nordsjøen [18/4 - 7/5, 2006]
Naustvoll, Lars-Johan ([Toktrapport/Havforskningsinstituttet];Nr. 7 - 2006, Working paper, 2006) -
Miljøtokt i Skagerrak, Kattegat og østlige Nordsjøen [19/4 - 8/5, 2005]
Danielssen, Didrik S.; Naustvoll, Lars-Johan ([Toktrapport/Havforskningsinstituttet];Nr. 16 - 2005, Working paper, 2005) -
Miljøundersøkelser i norske fjorder: Ytre Oslofjord 1937-2011
Aure, Jan; Danielssen, Didrik S.; Naustvoll, Lars-Johan (Fisken og Havet;5-2014, Research report, 2014-05-12)In the surface layer in Outer Oslofjord autumn temperatures were 2 - 4 °C above normal between 1996 and 2011 and summer temperatures (august) in 1995, 1997, 2002, 2004 and 2006 (19-21°C) were unormal high (19-21°C). In ... -
Modelling the dynamics of harmful blooms of Chattonella sp. in the Skagerrak and the Kattegat
Eilola, Kari; Almroth, Elin; Naustvoll, Lars-Johan; Andersen, Per; Karlson, Bengt (ICES CM documents;2006/E:12, Working paper, 2006)The presentation shows observations, satellite images and model results describing the growth and spreading of Chattonella sp. flagellates in the Skagerrak and the Kattegat. Chattonella sp. is a harmful alga that may cause ... -
Primærproduksjon (planteplankton)
Naustvoll, Lars-Johan (Havets ressurser og miljø, Chapter, 2007)In the Barents Sea, the monitoring of phytoplankton abundance and species composition is carried out on the transects Fugløya–Bjørnøya and Vardø–N and during the regional covering of the area in the autumn. The ... -
Spring bloom nutrient dynamics in the Oslofjord
Kristiansen, Svein; Farbrot, Tove; Naustvoll, Lars-Johan (Journal article; Peer reviewed, 2001-09-10)Primary production and uptake rates of ammonium, nitrate and silicic acid were measured during the 1996 spring bloom in the Oslofjord, southern Norway, using isotope methodology (14C, 15N and 32Si). Chlorophyll a (chl a) ... -
Toktrapport [13/9, 2004]
Naustvoll, Lars-Johan ([Toktrapport/Havforskningsinstituttet];Nr. 29 - 2004, Working paper, 2004) -
Toktrapport [5/2 - 6/2, 2004]
Naustvoll, Lars-Johan ([Toktrapport/Havforskningsinstituttet];Nr. 6 - 2004, Working paper, 2004-03-03) -
Toktrapport [9/10, 2004]
Naustvoll, Lars-Johan ([Toktrapport/Havforskningsinstituttet];Nr. 30 - 2004, Working paper, 2004) -
Toktrapport [9/7, 2004]
Naustvoll, Lars-Johan (Toktrapport/Havforskningsinstituttet;Nr. 27 - 2004, Working paper, 2004) -
Truet ålegressforekomst i indre Viksfjord, Larvik. Undersøkelser 2011-2013 i forbindelse med skjøtsel
Moy, Frithjof; Albretsen, Jon; Bodvin, Torjan; Naustvoll, Lars-Johan; Ohldieck, Martin (Rapport fra Havforskningen;Nr. 21-2014, Working paper, 2014-06-01)Viksfjorden, Larvik kommune, huser store ålegressforekomster av nasjonal viktighet, samt verdifulle grunne bløtbunnsområder og naturvernområder, inkludert et fuglereservat. Samtidig truer årvise oppblomstringer av ...