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norskInstitutt for arktisk og marin biologi: Recent submissions
Now showing items 1961-1980 of 2049
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Screening for antibacterial and antifungal activities in marine benthic invertebrates from northern Norway
(Journal article; Tidsskriftartikkel; Peer reviewed, 2008-06-18)Benthic marine invertebrates collected from sub-Arctic regions of northern Norway, were found to be a promising source of novel bioactive compounds against human and fish pathogenic bacteria and fungi. Lyophilized material from seven species of ascidians, six sponges and one soft alcyonid coral were extracted with 60% acidified acetonitrile (ACN). After separation into an ACN-rich phase (ACN extract) ... -
Sources of variation in macrobenthic biodiversity and the implications for monitoring programmes in the Barents Sea
(Master thesis; Mastergradsoppgave, 2009-07-01)In this thesis, several sources of variation which affect macrobenthic biodiversity was examined, in addition to addressing the resulting implications for monitoring programmes in the Barents Sea. Marine benthic biodiversity patterns at the time of sampling were examined across a range of scales, pre-defined by the study design. The benthic distribution was examined in relation to characteristics ... -
Farming cod: Putting the pressure on, and turning up the heat?
(Journal article; Tidsskriftartikkel, 2010) -
You are what you eat: Following fats through food chains
(Journal article; Tidsskriftartikkel, 2010) -
Gammaherpesvirus in semi-domesticated reindeer (Rangifer tarandus tarandus) in Finnmark County, Norway
(Master thesis; Mastergradsoppgave, 2010-05)Gammaherpesvirus causes the disease, malignant catarrhal fever (MCF), in wild and domestic ruminants worldwide. In Norway MCF occurs sporadically in wild and domestic ruminants. The present study examined the extent that semi-domesticated reindeer (Rangifer tarandus tarandus) in Finnmark, Norway, are exposed to gammaherpesvirus. A serological screening was performed to determine the prevalence of ... -
Seasonal changes in the Tapetum lucidum as an adaptation to winter darkness in reindeer
(Master thesis; Mastergradsoppgave, 2010-05-15)Reindeer (Rangifer tarandus tarandus) live at high latitudes and are therefore exposed to extreme changes in environmental illumination. In winter they spend months in relative darkness, in summer they are exposed to months of continuous brightness. Previous investigations have revealed a shift in the wavelength of the light being reflected by the tapetum lucidum (TL) between winter and summer. Since ... -
Does juvenile herring (Clupea harengus) affect the capelin (Mallotus villosus) recruitment in the Barents Sea? - A model study for the years 2001 - 2003 focusing on capelin larvae mortality, spawning sites and drift patterns
(Master thesis; Mastergradsoppgave, 2010-06-04)Barents Sea capelin (Mallotus villosus) year class strength is thought to be determined during the first months after egg hatching. The now widely accepted Hamre’s hypothesis states that young herring (Clupea harengus) present in the southern Barents Sea potentially may cause poor capelin recruitment. This hypothesis was presently tested through model scenarios, by simulating a realistic spatio-temporal ... -
The effects of persistent organic pollutants (POPs) on thyroid hormones and metabolic rate in exposed herring gull (Larus argentatus) chicks
(Master thesis; Mastergradsoppgave, 2010-05-18)The objectives of the present study were to investigate how plasma concentrations of POPs can affect thyroid hormone levels and basal metabolic rate (BMR) in herring gull (Larus argentatus) chicks. Thyroid hormones are the major controllers of metabolic rate in birds. High concentrations of persistent organic pollutants (POPs) may alter the thyroid hormone homeostasis and subsequently the BMR and ... -
Staðir-gårder : en pollenanalytisk undersøkelse av syv gårder med endelsen –stad (-staðir) i Vesterålen, Lofoten og Nord-Trøndelag
(Research report; Forskningsrapport, 1996)Ti pollendiagram fra syv lokaliteter presenteres. Lokalitetene er gårder eller tidligere gårder med endelsen –stad eller -staðir (gammel flertallsform). Gårdene er i kommunene Bø, Hadsel og Vestvågøy i Nordland fylke, og Namdalseid kommune i Nord-Trøndelag fylke. <br>Undersøkelsene er en del av prosjektet ” ..-stadirgårder og pollenanalyse” (gårder med endelsen -stadir og pollenanalyse). Formål ... -
Fjellrev i Finnmark : forskning og tiltak 2005
(Research report; Forskningsrapport, 2005) -
Fjellrev i Finnmark : forskning og tiltak 2004
(Research report; Forskningsrapport, 2004) -
Fjellrev i Finnmark: Årsrapport 2009
(Research report; Forskningsrapport, 2009) -
Fjellrev i Finnmark : årsrapport for 2008
(Research report; Forskningsrapport, 2008) -
Prosjekt ”Fjellrev i Finnmark” : rapport for perioden 2004-2007
(Research report; Forskningsrapport, 2007) -
Fjellrev i Finnmark : forskning og tiltak 2006
(Research report; Forskningsrapport, 2006) -
Migratory behaviour and survival rates of wild northern Atlantic salmon Salmo salar post-smolts: effects of environmental factors
(Conference object; Konferansebidrag, 2009-09-14) -
Structure and dynamics of the Barents Sea Polar Front near the Great Bank and associated plankton distribution in August 2007
(Master thesis; Mastergradsoppgave, 2010-03-30)The Polar Front separating Atlantic Water (AW) and Arctic Water (ArW) is one of the most dominant mesoscale features in the Barents Sea and a highly productive region. Here, the results of sub-mesoscale variability in physical and biological fields associated with the Barents Sea Polar Front (BSPF) at the Great Bank are reported from a high-resolution survey in August 2007. A nearly synoptic data ... -
Migratory behaviour and survival rates of wild northern Atlantic salmon (Salmo salar) post-smolts: effects of environmental factors
(Journal article; Tidsskriftartikkel; Peer reviewed, 2009-12-03)To study smolt behaviour and survival of a northern Atlantic salmon (Salmo salar) population during river descent, sea entry and fjord migration, 120 wild S. salar were tagged with acoustic tags and registered at four automatic listening station arrays in the mouth of the North Norwegian River Alta and throughout the Alta Fjord. An estimated 75% of the post-smolts survived from the river mouth, ... -
The substrate specificities and physiological function of the Toxoplasma gondii apicoplast phosphate translocator
(Master thesis; Mastergradsoppgave, 2009-05-15)The apicomplexan parasites including the causative agents of malaria (Plasmodium spp.) and toxoplasmosis (Toxoplasma gondii) are running the risk of developing resistance to existing drugs. Members of the phylum Apicomplexa harbour a relict plastid, the apicoplast, which show homology to the chloroplasts of plants and algae. The apicoplast appears to be indispensable to the parasites, and due to its ... -
Cultural eutrophication: perspectives and prospects
(Chapter; Bokkapittel, 2005-01-06)History of cultural eutrophication. Cultural eutrophication is old as Homo sapiens. In particular after the introduction of agriculture and larger settlements eutrophication has been mans faithful companion. During the pre-agricultural hunting and picking stage only probably a couple million humans inhabited the world and cultural eutrophication was negligible. The 3 orders of magnitude ...
