Blar i Department of Biological Sciences på tittel
Viser treff 1693-1712 av 2227
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Predation risk at dawn: How changing light and birds’ traits affect the temporal risk landscape during sunrise.
(Master thesis, 2018-09-01)Passerine birds, commonly known as songbirds, have a pronounced peak of singing before sunrise during their breeding season, known as the dawn chorus. This thesis aims to explore why they sing at this time – what are the ... -
Predator–prey interactions in the Arctic: DNA metabarcoding reveals that nestling diet of snow buntings reflects arthropod seasonality
(Journal article; Peer reviewed, 2023)Tundra arthropods are of considerable ecological importance as a seasonal food source for many arctic-breeding birds. Dietary composition and food preferences are rarely known, complicating assessments of ecological ... -
Predator–prey overlap in three dimensions: cod benefit from capelin coming near the seafloor
(Journal article; Peer reviewed, 2021)Spatial overlap between predator and prey is a prerequisite for predation, but the degree of overlap is not necessarily proportional to prey consumption. This is because many of the behavioural processes that precede ... -
Predicting abundance, species richness and assemblages of woodland snails using environmental variables
(Master thesis, 2003)The abundance and diversity of woodland snails (Gastropoda: Pulmonata) were investigated in a large-scale study in Geitaknottane Nature Reserve in Kvam County (Norway). Snails were collected in 132 squares (50 X 50 meters) ... -
Predicting and assessing climate-change impacts on the population dynamics of alpine and lowland forbs
(Doctoral thesis, 2015-05-29)Background and aims: Global climate change is already affecting plant species worldwide. The global rise in temperatures and regional changes in precipitation are predicted to continue throughout the century. Therefore, ... -
Predicting decline of threatened species, invasiveness of alien species, and invasibility of seminatural habitats: A case study from threatened coastal heathlands and semi-natural grasslands in western Norway
(Doctoral thesis, 2019-04-23)Semi-natural habitats are characterised by a large biodiversity, but also associated with a large susceptibility to invasion by non-native species. Coastal heathlands and semi-natural grasslands in Norway, are under pressure ... -
The Preen Gland - an Organ for Excretion of Persistent Organic Pollutants in Black-legged Kittiwake (Rissa tridactyla)
(Master thesis, 2010-06-01)Persistent organic pollutants (POPs) constitute a chemically diverse group of lipophilic substances that may accumulate in living organisms, often with harmful effects. To some extent these substances may be expelled via ... -
Presence and habitats of bacterial fish pathogen relatives in a marine salmon post-smolt RAS
(Journal article; Peer reviewed, 2022)Recycling aquaculture system (RAS) requires well-functioning microbial communities to support fish welfare and to minimize the risk of spreading diseases. In this study of a marine post-smolt RAS we searched for groups of ... -
Prevalence and genotypes of infectious salmon anaemia virus (ISAV) in returning wild Atlantic salmon (Salmo salar L.) in northern Norway
(Peer reviewed; Journal article, 2019-08) -
Prevalence of infectious salmon anaemia virus (ISAV) in wild salmonids in western Norway
(Peer reviewed; Journal article, 2005-08-09)Studies of infectious salmon anaemia virus (ISAV), an important pathogen of farmed salmon in Norway, Scotland, the Faeroe Islands, Ireland, Canada, the USA and Chile, suggest that natural reservoirs for this virus can be ... -
Prevalence of piscine orthoreovirus and salmonid alphavirus in sea-caught returning adult Atlantic salmon (Salmo salar L.) in northern Norway
(Peer reviewed; Journal article, 2018-05)Heart and skeletal muscle inflammation (HSMI) caused by piscine orthoreovirus (PRV) and pancreas disease (PD) caused by salmonid alphavirus (SAV) are among the most prevalent viral diseases of Atlantic salmon farmed in ... -
Probing of mortality rate by staying alive: The growth-reproduction trade-off in a spatially heterogeneous environment
(Peer reviewed; Journal article, 2019)1. In many annual plants, mollusks, crustaceans and ectothermic vertebrates, growth accompanies reproduction. The growth curves of these organisms often exhibit a complex shape, with episodic cessations or accelerations ... -
Production and verification of the first Atlantic salmon (Salmo salar L.) clonal lines
(Journal article; Peer reviewed, 2020)Background In several fish species homozygous and heterozygous clonal lines have been produced using gynogenetic and androgenetic techniques. These lines are standardized and can be reproduced over generations. In rainbow ... -
Production performance of Atlantic salmon post-smolts in cyclic hypoxia, and following compensatory growth
(Peer reviewed; Journal article, 2014-07)This study investigated the production performance of the Atlantic salmon postsmolt (Salmo salar L.) subjected to cyclic oxygen reductions (hypoxia) of varying severity. Triplicate groups (N = 955) were kept at constant ... -
Production, characterization, and application of an alginate lyase, AMOR_PL7A, from hot vents in the Arctic mid-ocean ridge
(Journal article; Peer reviewed, 2019)Enzymatic depolymerization of seaweed polysaccharides is gaining interest for the production of functional oligosaccharides and fermentable sugars. We describe a thermostable alginate lyase belonging to Polysaccharide Lyase ... -
Produksjon av antiserum mot Norwegian salmonid alphavirus
(Master thesis, 2012-10-26)Pankreassykdom (PD) er en infeksiøs virussykdom som rammer Atlantisk laks (Salmo salar L.) og regnbueørret (Oncorhynchus mykiss, Walbaum) i både saltvann og ferskvann i flere viktige lakseproduserende land. I studiet vårt ... -
Profundibacter amoris gen. nov., sp. nov., a new member of the Roseobacter clade isolated from Loki's Castle Vent Field on the Arctic Mid-Ocean Ridge
(Peer reviewed; Journal article, 2019)A bacterial strain, designated BAR1T, was isolated from a microbial mat growing on the surface of a barite chimney at the Loki’s Castle Vent Field, at a depth of 2216 m. Cells of strain BAR1T were rod-shaped, Gram-reacti ... -
Progressive Motor and Non-Motor Symptoms in Park7 Knockout Zebrafish
(Journal article; Peer reviewed, 2023)DJ-1 is a redox sensitive protein with a wide range of functions related to oxidative stress protection. Mutations in the park7 gene, which codes for DJ-1 are associated with early onset familial Parkinson’s disease and ... -
The proinflammatory cytokines TNF-α and IL-6 in lumpfish (Cyclopterus lumpus L.) -identification, molecular characterization, phylogeny and gene expression analyses
(Journal article; Peer reviewed, 2020)The proinflammatory cytokines TNF-α and IL-6 are important mediators of inflammatory reactions and orchestrators of the immune system in vertebrate. In this study, we have identified TNF-α and IL-6 in lumpfish, molecular ... -
Proof of Principle Efficacy and Safety Optimisation of Tenacibaculum Vaccine Prototypes Against Tenacibaculosis in Atlantic Salmon
(Master thesis, 2022-06-01)Mouthrot, caused by the bacterium Tenacibaculum maritimum, is a major health and welfare problem in newly sea-transferred Atlantic salmon smolts (Salmo salar) in BC, Canada, and have caused large economical losses over the ...