Browsing Institutt for biologi by Title
Now showing items 1703-1722 of 2516
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Pelagic occurrences of the ice amphipod Apherusa glacialis throughout the Arctic
(Journal article; Peer reviewed, 2020)Apherusa glacialis is a common, sea ice-associated amphipod found throughout the Arctic Ocean and has long been considered permanently associated with the sea ice habitat. However, pelagic occurrences of A. glacialis have ... -
Pelagic organisms avoid white, blue, and red artificial light from scientific instruments
(Journal article; Peer reviewed, 2021)In situ observations of pelagic fish and zooplankton with optical instruments usually rely on external light sources. However, artificial light may attract or repulse marine organisms, which results in biased measurements. ... -
A peptide toxin in ant venom mimics vertebrate EGF-like hormones to cause long-lasting hypersensitivity in mammals
(Peer reviewed; Journal article, 2022)Venoms are excellent model systems for studying evolutionary processes associated with predator–prey interactions. Here, we present the discovery of a peptide toxin, MIITX2-Mg1a, which is a major component of the venom of ... -
Per- and poly-fluoroalkyl substances in Tawny Owl (Strix aluco) feathers from Trøndelag, Norway
(Journal article; Peer reviewed, 2023)Per- and polyfluoroalkyl substances (PFASs) are contaminants of global concern due to their ubiquitous occurrence in the environment, bioaccumulation and the adverse effects on organisms. Tawny Owls (Strix aluco) are ... -
Per- and polyfluoroalkyl substances (PFAS) in ski products: Environmental contamination, bioaccumulation and effects in rodents
(Doctoral theses at NTNU;2021:328, Doctoral thesis, 2021)Per- and polyfluoroalkyl substances (PFAS) are a group of anthropogenic contaminants that are widespread in the environment. Due to the strong persistency and water and lipid repellency, PFAS have been used in a wide range ... -
Per- and polyfluoroalkyl substances (PFASs) concentrations over the laying sequence in eggs of the common eider (Somateria mollissima) from the Baltic Sea in relation to sex steroid hormones
(Master thesis, 2022)Abstract will be available on 2023-06-01 -
Per- and polyfluoroalkyl substances effects on thyroid hormone homeostasis in plasma samples of grey seal (Halichoerus grypus) pups from Norway
(Master thesis, 2023)Havert (Halichoerus grypus) er et marint pattedyr som har kasteplass på Froan langs Norskekysten. De siste årene har antallet selunger født på disse øyene sunket. Siden havert er et rovdyr på toppen av næringskjeden, er ... -
Per- and polyfluoroalkyl substances in plasma and feathers of nestling birds of prey from northern Norway
(Journal article; Peer reviewed, 2017)Plasma samples from nestlings of two top predators, White‐tailed eagle (Haliaeetus albicilla) and Northern goshawk (Accipiter gentilis) from northern Norway were analysed for a wide range of PFASs. Body feathers from the ... -
Perfluorinated substances and telomeres in an Arctic seabird: Cross-sectional and longitudinal approaches
(Journal article; Peer reviewed, 2017)Telomeres are non-coding DNA repeats located at the termini of eukaryotic chromosomes, regulated by dynamic processes balancing shortening and maintenance. Despite a mechanism to slow-down telomere shortening, cell division ... -
Perfluoroalkyl and Polyfluoroalkyl Substances (PFASs) Affect the Thyroid Hormone System, Body Condition, and Body Mass in Two Arctic Seabird Species
(Master thesis, 2015)Perfluoroalkyl and polyfluoroalkyl substances (PFASs) are being transported into the Arctic where they are frequently detected in wildlife. These compounds are suspected thyroid hormone (TH) disruptors due to their structural ... -
Perfluoroalkyl substances (PFASs) in white whales (Delphinapterus leucas) from Svalbard – A comparison of concentrations in plasma sampled 15 years apart
(Peer reviewed; Journal article, 2020)The objective of the present study was to investigate recent concentrations of perfluoroalkyl substances (PFASs) in white whales (Delphinapterus leucas) from Svalbard and compare them to concentrations found in white whales ... -
Perfluoroalkyl substances are positively correlated with triiodothyronine concentrations, but not metabolic rate in breeding arctic terns (Sterna paradisaea)
(Master thesis, 2021)Perfluorerte alkylstoffer (PFAS) er allestedsnærværende miljøgifter, hvorav mange er svært persistente. Forskning tyder på at denne kjemikaliegruppen har tyroidhormonforstyrrende egenskaper og mulige effekter på metabolismen ... -
The persistent effects of corticosterone administration during lactation on the physiology of maternal and offspring mitochondria
(Journal article; Peer reviewed, 2022) -
Persistent organic pollutants and organophosphate esters in feathers and blood plasma of adult kittiwakes (Rissa tridactyla) from Svalbard – associations with body condition and thyroid hormones
(Journal article; Peer reviewed, 2018)Polychlorinated biphenyls (PCBs), polybrominated diphenyl ethers (PBDEs), organochlorine pesticides (OCPs) and organophosphate esters (OPEs) were assessed in blood plasma and feathers of 19 adult black-legged kittiwakes ... -
Persistent organic pollutants, skull size and bone density of polar bears (Ursus maritimus) from East Greenland 1892-2015 and Svalbard 1964-2004.
(Journal article; Peer reviewed, 2017)We investigated skull size (condylobasal length; CBL) and bone mineral density (BMD) in polar bears (Ursus maritimus) from East Greenland (n = 307) and Svalbard (n = 173) sampled during the period 1892–2015 in East Greenland ... -
Personality and Innovation in House Sparrows - Evolutionary and Demographic Consequences of Individual Phenotypic Differences
(Master thesis, 2015)Atferdssyndromer, og kovarians mellom trekk er essensielle for forståelse av fenotypisk struktur og fenotypisk variasjon. Nyere forskning viser at atferdssyndromer ikke bare eksisterer, men at disse varierer i struktur ... -
Personality and pace-of-life behavioral syndromes in a model species, the House Sparrow (Passer domesticus)
(Master thesis, 2016)Consistent individual differences in behaviour ( animal personality ) may be favoured by natural selection because they are driven by adaptive differences in life-history and physiology traits, constituting a pace-of-life ... -
PFOS mediates immunomodulation in an avian cell line that can be mitigated via a virus infection
(Journal article; Peer reviewed, 2019)Background Per- and polyfluoroalkyl substances (PFASs) are environmentally persistent and bioaccumulative chemicals. Immunomodulation is among the most concerning of toxic effects linked with PFAS exposure in mammalian ... -
Phenanthrene Bioavailability and Toxicity to Daphnia magna in the Presence of Carbon Nanotubes with Different Physicochemical Properties
(Journal article; Peer reviewed, 2016)Studies investigating the effect of carbon nanotubes (CNTs) on the bioavailability and toxicity of hydrophobic organic compounds in aquatic environments have generated contradictory results, and the influence of different ... -
Phenotypic and genotypic divergence of plant–herbivore interactions along an urbanization gradient
(Peer reviewed; Journal article, 2022)Urban environments provide challenging conditions for species survival, including increased temperatures, drought and pollution. Species can deal with these conditions through evolution across generations or the immediate ...