English
norskBlar i tittel Artikler, rapporter og annet (arktisk og marin biologi)
Viser treff 972-991 av 1513
-
O Papel da Administração Pesqueira na Gestão do Subsector Artesanal em Moçambique: O presente e modelos para o futuro
(Research report; Forskningsrapport, 2008-05)Gerir pescarias artesanais é tarefa muito complexa em qualquer parte do mundo, e não existem receitas prontas de como o fazer. Os objectivos do presente trabalho são fazer uma ordenação sistemática dos principais conflitos endógenos e exógenos da pesca artesanal, incluindo uma análise do estado das pescarias, da interacção entre frotas, e da relação das pescas com assuntos de conservação e outras ... -
Occurrence of emerging brominated flame retardants and organophosphate esters in marine wildlife from the Norwegian Arctic
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-10-10)To understand the exposure and potential sources of emerging brominated flame retardants (EBFR) and organophosphate esters (OPEs) in marine wildlife from the Norwegian Arctic, we investigated concentrations of EBFRs in 157 tissue samples from nine species of marine vertebrates and OPEs in 34 samples from three whale species. The samples, collected from a wide range of species with contrasting ... -
The occurrence of Nematoda in coastal sea ice on Svalbard (European Arctic) determined with the 18S small subunit rRNA gene
(Journal article; Tidsskriftartikkel; Peer reviewed, 2021-05-06)Understanding the diversity and functioning of Arctic sea ice ecosystems is vital to evaluate and predict the impact of current and future climate change. In the microscopic communities inhabiting the brine channels inside sea ice, nematodes often dominate numerically and act as bacterivores and herbivores. Despite nematodes great abundances and known ecological roles, molecular tools have not been ... -
Ocean migration of pop-up satellite archival tagged Atlantic salmon from the Miramichi River in Canada
(Journal article; Tidsskriftartikkel; Peer reviewed, 2017-01-13)The ocean migration of 16 post-spawned adult Atlantic salmon [Salmo salar L.] from the Miramichi River, Canada, tagged concurrently with pop-up satellite archival tags and acoustic transmitters was reconstructed using a Hidden Markov Model. Individuals exclusively utilized areas within the Gulf of St Lawrence and the Labrador Sea, and showed little overlap with known distributions of European stocks. ... -
Ocean predation and mortality of adult Atlantic salmon
(Journal article; Peer reviewed, 2019-05-27)Predation and mortality are often difficult to estimate in the ocean, which hampers the management and conservation of marine fishes. <br>We used data from pop-up satellite archival tags to investigate the ocean predation and mortality of adult Atlantic salmon (Salmo salar) released from 12 rivers flowing into the North Atlantic Ocean. Data from 156 tagged fish revealed 22 definite predation ... -
Ocean predation and mortality of adult Atlantic salmon
(Journal article; Peer reviewed, 2019-05-27)Predation and mortality are often difficult to estimate in the ocean, which hampers the management and conservation of marine fishes. We used data from pop-up satellite archival tags to investigate the ocean predation and mortality of adult Atlantic salmon (Salmo salar) released from 12 rivers flowing into the North Atlantic Ocean. Data from 156 tagged fish revealed 22 definite predation events (14%) ... -
Oceanic drivers of juvenile sea turtle strandings in the UK.
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-05-05)Juvenile sea turtles can disperse thousands of kilometers from nesting beaches to oceanic development habitats, aided by ocean currents. In the North Atlantic, turtles dispersing from American beaches risk being advected out of warm nursery grounds in the North Atlantic Gyre into lethally cold northern European waters (e.g. around the UK). We used an ocean model simulation to compare simulated ... -
Ocular Histopathological Findings in Semi-Domesticated Eurasian Tundra Reindeer (Rangifer tarandus tarandus) with Infectious Keratoconjunctivitis after Experimental Inoculation with Cervid Herpesvirus 2
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-09-09)Infectious keratoconjunctivitis (IKC) is a common transmissible ocular disease in semi-domesticated Eurasian tundra reindeer (<i>Rangifer tarandus tarandus</i>). In large outbreaks, IKC may affect tens of animals in a herd, with the most severe cases often requiring euthanasia due to the destruction of the affected eyes and permanent blindness. An experimental inoculation with cervid herpesvirus 2 ... -
On Roald Amundsen’s scientific achievements
(Journal article; Tidsskriftartikkel; Peer reviewed, 2017-01-25)This paper describes the significant direct and indirect contributions to science made by the Norwegian polar explorer Roald Amundsen in the period 1897–1924. It documents that his expeditions through the North-west Passage (1903–06) with Gjøa, to the South Pole (1910–12) with Fram and through the North-east Passage (1918–1920) and the Chukchi and East Siberian seas (1921–25) with Maud yielded vast ... -
On the developmental and environmental regulation of secondary metabolism in Vaccinium spp. berries
(Journal article; Tidsskriftartikkel; Peer reviewed, 2016-05-18)Secondary metabolites have important defense and signaling roles, and they contribute to the overall quality of developing and ripening fruits. Blueberries, bilberries, cranberries, and other Vaccinium berries are fleshy berry fruits recognized for the high levels of bioactive compounds, especially anthocyanin pigments. Besides anthocyanins and other products of the phenylpropanoid and flavonoid ... -
On the relative effect of spawning asynchrony, sperm quantity, and sperm quality on paternity under sperm competition in an external fertilizer
(Journal article; Tidsskriftartikkel; Peer reviewed, 2015-07-14)How much of a fitness benefit is obtained by dominant males of external fertilizers from releasing ejaculates in synchrony with female egg-release when engaging in sperm competition, and what is the most important sperm trait for paternity in these situations? The Arctic charr (Salvelinus alpinus) is an external fertilizer experiencing intense male-male competition over reproductive opportunities ... -
On the resistance of epiphytic cyanobacteria of the Kola Bay to the effects of oil hydrocarbons in the aquatic ecosystem
(Journal article; Tidsskriftartikkel; Peer reviewed, 2018)The epiphytic communities of cyanobacteria of Fucus vesiculosus L. of the Kola Bay are able to bear the high amounts of the oil products in the environment. The results of studying the resistance of epiphytic cyanobacterial communities to oil pollution using both classical (cultural) and molecular-genetic methods of microbiological analysis have been presented. The objects of the study are the ... -
On the use of the HUGIN 1000 HUS Autonomous Underwater Vehicle for high resolution zooplankton measurements
(Journal article; Tidsskriftartikkel; Peer reviewed, 2010)This paper evaluates and tests the HUGIN 1000 HUS AUV as a carrier platform for the Laser Optical Plankton Counter (LOPC). The LOPC was mounted outside on top of the carrier platform, and the tests confirm that this concept did not create turbulence and zooplankton avoidance. A negligible velocity difference between the flow passing through the sampling tube and the AUV speed was detected. The ... -
One leaf for all: Chemical traits of single leaves measured at the leaf surface using near-infrared reflectance spectroscopy
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-06-10)1. The leaf is an essential unit for measures of plant ecological traits. Yet, measures of plant chemical traits are often achieved by merging several leaves, masking potential foliar variation within and among plant individuals. This is also the case with cost‐effective measures derived using near‐infrared reflectance spectroscopy (NIRS). The calibration models developed for converting NIRS spectral ... -
The One Ocean Expedition: Science and Sailing for the Ocean We Want
(Research report; Forskningsrapport, 2023-08-24)The One Ocean Expedition (OOE) was a 20-month long circumnavigation of the globe by the Norwegian sail training vessel Statsraad Lehmkuhl, and a recognised part of the UN decade of Ocean Science for Sustainable Development. The ship was equipped with modern instrumentation to collect high-quality data on ocean physics, chemistry, and biology. Many of the data series were available in near real time ... -
Onset of autumn senescence in High Arctic plants shows similar patterns in natural and experimental snow depth gradients
(Journal article; Tidsskriftartikkel; Peer reviewed, 2021-08-30)Predicted changes in snow cover and temperature raise uncertainties about how the beginning and the end of the growing season will shift for Arctic plants. Snowmelt timing and temperature are known to affect the timing of bud burst, but their effects on autumn senescence are less clear. To address this, researchers have examined senescence under natural and experimental environmental gradients. ... -
Ontogenetic dynamics of infection with Diphyllobothrium spp. cestodes in sympatric Arctic charr Salvelinus alpinus (L.) and brown trout Salmo trutta L.
(Journal article; Tidsskriftartikkel; Peer reviewed, 2015-12-23)The trophic niches of Arctic charr and brown trout differ when the species occur in sympatry . Their trophically transmitted parasit es are expected to reflect these differences. Here , we investigate how the infections of Diphyllobothrium dendriticum and Diphyllobothrium ditremum differ between charr and trout. These tapeworms use copepods ... -
Optimization of a low flow sampler for improved assessment of gas and particle bound exposure to chlorinated paraffins
(Journal article; Tidsskriftartikkel; Peer reviewed, 2021-02-23)An optimized low volume sampler was developed to determine both gas- and particle bound concentrations of short and medium-chain chlorinated paraffins (S/MCCPs). Background contamination was limited by the sampler design, providing method quantification limits (MQLs) at least two orders of magnitude lower than other studies within the gas (MQL: 500 pg (ΣSCCPs), 1.86 ng (ΣMCCPs)) and particle (MQL: ... -
ORCHIDEE-PEAT (revision 4596), a model for northern peatland CO2, water, and energy fluxes on daily to annual scales
(Journal article; Tidsskriftartikkel; Peer reviewed, 2018-02-05)Peatlands store substantial amounts of carbon and are vulnerable to climate change. We present a modified version of the Organising Carbon and Hydrology In Dynamic Ecosystems (ORCHIDEE) land surface model for simulating the hydrology, surface energy, and CO<sub>2</sub> fluxes of peatlands on daily to annual timescales. The model includes a separate soil tile in each 0.5° grid cell, defined from a ... -
Orf virus infection in Alaskan mountain goats, Dall’s sheep, muskoxen, caribou and Sitka black-tailed deer
(Journal article; Tidsskriftartikkel, 2018-02-21)Background: <br>The zoonotic Orf virus (ORFV; genus Parapoxvirus, Poxviridae family) occurs worldwide and is transmit‑ted between sheep and goats, wildlife and man. Archived tissue samples from 16 Alaskan wildlife cases, representing mountain goat (Oreamnos americanus, n= 8), Dall’s sheep (Ovis dalli dalli, n= 3), muskox (Ovibos moschatus, n= 3), Sitka black‑tailed deer (Odocoileus hemionus sitkensis, ...
