Blar i Department of Biological Sciences på tittel
Viser treff 1101-1120 av 2290
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Immunrespons mot Pasteurella spp. hjå rognkjeks (Cyclopterus lumpus L.) og Atlantisk laks (Salmo salar L.)
(Master thesis, 2021-06-01)Dei siste åra har ein sett ei dramatisk auke i tilfelle pasteurellose i norsk oppdrett av rognkjeks (Cyclopterus lumpus L.) og Atlantisk laks (Salmo salar L.). Sjukdommen førar til redusert fiskevelferd og kan innebere høg ... -
The impact of anti-sea lice pesticides, azamethiphos and deltamethrin, on European lobster (Homarus gammarus) larvae in the Norwegian marine environment
(Journal article; Peer reviewed, 2020)Anti-sea lice pesticides, used in the salmonid aquaculture industry, are a growing environmental concern due to their potential to adversely affect non-target crustaceans. Azamethiphos and deltamethrin are two bath treatment ... -
Impact of Antioxidant Feed and Growth Manipulation on the Redox Regulation of Atlantic Salmon Smolts
(Journal article; Peer reviewed, 2022-08-30)Accumulating evidence indicates a close relationship between oxidative stress and growth rate in fish. However, the underlying mechanisms of this relationship remain unclear. This study evaluated the combined effect of ... -
Impact of dietary level and ratio of n-6 and n-3 fatty acids on disease progression and mRNA expression of immune and inflammatory markers in Atlantic salmon (Salmo salar) challenged with Paramoeba perurans
(Journal article; Peer reviewed, 2021)The aim of the study was to investigate the influence of dietary level and ratio of n-6/n-3 fatty acids (FA) on growth, disease progression and expression of immune and inflammatory markers in Atlantic salmon (Salmo salar) ... -
Impact of environmental factors on the growth and maturation of farmed Arctic charr
(Journal article; Peer reviewed, 2020)Farming of Arctic charr mainly takes place in land‐based farms applying intensive rearing methods with relatively high production costs. Depending on local conditions at each site, it is possible to regulate important ... -
Impact of environmental parameters and dispersal on microbial communities in hydrothermal areas of the Nordic Seas
(Doctoral thesis, 2017-09-29)The oceans are an extremely diverse environment due to the numerous physicochemical gradients occurring throughout the water column. Microorganisms have adapted to live in virtually all available niches. Therefore, an ... -
Impact of fish density and specific water flow on skin properties in Atlantic salmon (Salmo salar L.) post-smolts
(Peer reviewed; Journal article, 2016)Prolonged production of Atlantic salmon (Salmo salar) post-smolts in closed-containment systems has prompted research into biological requirements under higher production intensities. This study examined the effect of fish ... -
Impact of hatch-date on early life growth and survival of Mueller's pearlside (Maurolicus Muelleri) larvae, and life-history consequences
(Peer reviewed; Journal article, 2016-02)Growth and survival of Maurolicus muelleri larvae in Herdlefjorden, Norway, were investigated by daily otolith increment analysis. While high egg densities were generally observed throughout the spawning season, three ... -
Impact of long-term fasting on the stomach-hypothalamus appetite regulating genes in Atlantic salmon postsmolts
(Journal article; Peer reviewed, 2023)Atlantic salmon will experience periods of fasting during its lifecycle. In nature, prolonged fasting periods occur owing to seasonal fluctuations in available feeds, migration or in relation to reproduction. In a culture ... -
The impact of lysine and arginine ratios in plant-based protein diets on appetite, growth performance and gene expression of brain neuropeptide Y (NPY) and cholecystokinin (CCK) in juvenile cobia (Rachycentron canadum)
(Doctoral thesis, 2013-01-31)Aquaculture of cobia, Rachycentron canadum is hampered by lack of good feeding protocols and nutritionally optimized diets. Studies on the role of appetite and feeding behavior regulating neuropeptides in cobia have not ... -
The impact of micro-mineral sources and their availability on hepatic lipid metabolism in Atlantic salmon (Salmo salar)
(Master thesis, 2018-06-27)The increased use of plant-based ingredients in aquafeeds for Atlantic salmon has led to an increase in phytate, an antinutrient binding micro minerals and reducing their bioavailability. It has been suggested that the ... -
Impact of Nitrogen Deposition on Species Richness and Species Composition of Ombrotrophic Mires in Western Norway
(Master thesis, 2013-07-09)There is almost no research on ombrotrophic mire vegetation and the possible impact of atmospheric nitrogen deposition on species richness and composition in Norway. It is important to detect whether N deposition is impacting ... -
Impacts of predation by Eurasian otters on Atlantic salmon in two Norwegian rivers
(Journal article; Peer reviewed, 2023)1. The return of the Eurasian otter (Lutra lutra) to western Norway has sparked human–predator conflicts because otters prey on vulnerable Atlantic salmon (Salmo salar) populations. Although predation may not be the ultimate ... -
Implications for introgression: Has selection for fast growth altered the size threshold for precocious male maturation in domesticated Atlantic salmon?
(Peer reviewed; Journal article, 2018-12-18)Background: Mature male parr (MMP) represent an important alternative life-history strategy in Atlantic salmon populations. Previous studies indicate that the maturation size threshold for male parr varies among wild ... -
Implications of a changing Arctic on microbial communities: Following the effects of thawing permafrost from land to sea
(Doctoral thesis, 2018-06-14)Climate change has severe impacts in the Arctic, where permafrost is thawing, glaciers are retreating and sea ice is melting. These physical changes are not only affecting large predators like polar bears, but also microscopic ... -
The importance of Biotic vs. Abiotic drivers of local plant community composition along regional bioclimatic gradients
(Peer reviewed; Journal article, 2015-06-19)We assessed if the relative importance of biotic and abiotic factors for plant community composition differs along environmental gradients and between functional groups, and asked which implications this may have in a ... -
The importance of feeding in determining the sensitivity of benthic invertebrates to future climate change in the tunicate species Ciona intestinalis
(Master thesis, 2016-03-14)Anthropogenically induced global climate change is one of the worlds biggest threats today, with marine ecosystems particularly vulnerable. In the future, the ocean temperature is expected to rise with 2 °C followed by a ... -
The importance of microbiota and terrestrial inflows in controlling seston C:N:P:O:Si:Ca:Mn:Mg:Fe:K:Na:Cl:S:Cu:Zn stoichiometry of a deep coastal fjord
(Journal article; Peer reviewed, 2022)Comprehensive fjord-systems represent major extensions of the coastline and are therefore important transfer zones of materials from land to ocean. Despite increased terrestrial inflows to fjords due to climate changes, ... -
The importance of plant macrofossils in the reconstruction of Lateglacial vegetation and climate: examples from Scotland, western Norway, and Minnesota, USA
(Peer reviewed; Journal article, 2003-03)Lateglacial and early Holocene (ca 14–9000 14C yr BP; 15–10,000 cal yr BP) pollen records are used to make vegetation and climate reconstructions that are the basis for inferring mechanisms of past climate change and for ... -
The importance of social dimension and maturation stage for the probabilistic maturation reaction norm in Poecilia reticulata
(Peer reviewed; Journal article, 2013-10-01)Maturation is an important event in an organism's life history, with important implications on dynamics of both wild and captive populations. The probabilistic maturation reaction norm (PMRN) has emerged as an important ...