Department of Biological Sciences: Recent submissions
Now showing items 21-40 of 2225
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Methods for tagging an ectoparasite, the salmon louse Lepeophtheirus salmonis
(Journal article; Peer reviewed, 2024)Monitoring individuals within populations is a cornerstone in evolutionary ecology, yet individual tracking of invertebrates and particularly parasitic organisms remains rare. To address this gap, we describe here a method ... -
Occurrence of salmonid alphavirus and piscine orthoreovirus-1 infections in migrating salmon (Salmo salar L.) post-smolt in western Norway
(Journal article; Peer reviewed, 2023)Viral diseases are a serious problem in Atlantic salmon (Salmo salar L.) farming in Norway, often leading to reduced fish welfare and increased mortality. Disease outbreaks in salmon farms may lead to spread of viruses to ... -
Five reasons to take the precautionary approach to deep sea exploitation
(Journal article, 2023)Extractive activities in the deep sea are poised to advance faster than the science needed to evaluate risks. Here, we call for a strong precautionary approach in developing these industries. -
Diminishing returns on labour in the global marine food system
(Journal article; Peer reviewed, 2023)Technological advances over the past century have greatly reduced the proportion of human labour required to produce the world’s food. On land, these advances have continually increased yields, feeding a growing human ... -
DNA and scale reading to identify repeat spawning in Atlantic salmon: Unique insights into patterns of iteroparity
(Journal article; Peer reviewed, 2023)Iteroparity represents an important but often overlooked component of life history in anadromous Atlantic salmon. Here, we combined individual DNA profiling and scale reading to identify repeat spawners among ~8000 adult ... -
Positioning aquatic animals with acoustic transmitters
(Journal article; Peer reviewed, 2023)Geolocating aquatic animals with acoustic tags has been ongoing for decades, relying on the detection of acoustic signals at multiple receivers with known positions to calculate a 2D or 3D position, and ultimately recreate ... -
The evolving story of catadromy in the European eel (Anguilla anguilla)
(Journal article; Peer reviewed, 2023)Anguillid eels were once considered to be the classic example of catadromy. However, alternative life cycles have been reported, including skipping the freshwater phase and habitat shifting between fresh, brackish, and ... -
New wine in old bottles: Modification of the Na+/K+-ATPase enzyme activity assay and its application in salmonid aquaculture
(Journal article; Peer reviewed, 2023)The Na+, K+ ATPase (NKA) enzyme is important to generate the transmembrane ion gradient in the gills, intestine, and kidneys, hence, is vital for secondary transport of fluids and different solutes in teleosts. Gill NKA ... -
ECKOchain: A FAIR blockchain-based database for long-term ecological data
(Journal article; Peer reviewed, 2024)Open data practices in ecology are increasingly accepted, yet primary long-term ecological data remain hard to find. Barriers preventing open long-term ecological data include social and economic constructs such as a sense ... -
Mixed-stock analysis of Atlantic herring (Clupea harengus): a tool for identifying management units and complex migration dynamics
(Journal article; Peer reviewed, 2023)We developed and validated a mixed-stock analysis (MSA) method with 59 single-nucleotide polymorphisms selected from genome-wide data to assign individuals to populations in mixed-stock samples of Atlantic herring from the ... -
Bioenergetics modelling of growth processes in parasitized Eastern Baltic cod (Gadus morhua L.)
(Journal article; Peer reviewed, 2023)Changes in physiological processes can reveal how individuals respond to environmental stressors. It can be difficult to link physiological responses to changes in vital rates such as growth, reproduction and survival. ... -
Evaluation of black soldier fly larvae meal as a functional feed ingredient in Atlantic salmon (Salmo salar) under farm-like conditions
(Journal article; Peer reviewed, 2023)Atlantic salmon (Salmo salar) were fed diets containing black soldier fly larvae (BSFL) meal at two inclusion levels for 13 months in open sea-cages. BSFL meal replaced plant-based ingredients and dietary insect meal ... -
Pan-genome survey of the fish pathogen Yersinia ruckeri links accessory- and amplified genes to virulence
(Journal article; Peer reviewed, 2023)While both virulent and putatively avirulent Yersinia ruckeri strains exist in aquaculture environments, the relationship between the distribution of virulence-associated factors and de facto pathogenicity in fish remains ... -
Phylogeography and host specificity of Pasteurellaceae pathogenic to sea-farmed fish in the north-east Atlantic
(Journal article; Peer reviewed, 2023)The present study was undertaken to address the recent spate of pasteurellosis outbreaks among sea-farmed Atlantic salmon (Salmo salar) in Norway and Scotland, coinciding with sporadic disease episodes in lumpfish (Cyclopterus ... -
Nucleolar roles of the PI3K pathway in cancer and differentiation
(Doctoral thesis, 2017-12-18)The phosphoinositide 3-kinase (PI3K) pathway is essential for many cellular functions including; proliferation, cell survival, differentiation and metabolism. Although this pathway has been well studied in the cytoplasm, ... -
Salmon lice as models for understanding life history evolution of parasites under intensive farming
(Doctoral thesis, 2017-06-20)Human activities are drastically changing ecological conditions for living organisms and this leads to evolutionary changes. One example is the appearance and spread of resistance against drugs and antibiotics, but we also ... -
Nuclear receptor targets for environmental pollutants. Modulation of transcriptional activity of pregnane x receptor and peroxisome proliferator-activated receptor gamma in polar bears and zebrafish
(Doctoral thesis, 2016)Liganded nuclear receptors can be viewed as transcriptional dimmers whose activity is adjusted by molecular signals. Since the chemical footprint of humans continue to increase, the numbers of chemicals in the environment ... -
Light and visual foraging in the pelagic: Opportunities and constraints along gradients of seasonality
(Doctoral thesis, 2019-04-30)Light has a twofold fundamental impact on marine ecosystems; it allows photosynthesis that is at the source of most marine food chains, but it also governs top-down control through visual foraging. Here, I focus on the ... -
Phaeoviruses Present in Cultured and Natural Kelp Species, Saccharina latissima and Laminaria hyperborea (Phaeophyceae, Laminariales), in Norway
(Journal article; Peer reviewed, 2023)Phaeoviruses (Phycodnaviridae) are large icosahedral viruses in the phylum Nucleocytoviricota with dsDNA genomes ranging from 160 to 560 kb, infecting multicellular brown algae (Phaeophyceae). The phaeoviral host range is ... -
Evaluation of photodegradable chitin synthetase inhibitors for the treatment of salmon lice (Lepeophtheirus salmonis)
(Journal article; Peer reviewed, 2023)Some photolabile ethanolamine analogues of the chitin synthetase inhibitors diflubenzuron, teflubenzuron, and lufenuron were tested for activity as anti-lice compounds towards salmon lice (Lepeophtheirus salmonis). Two ...