Browsing Articles by Subject "VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Aquaculture: 922"
Now showing items 61-80 of 130
-
Forensic identification of fish farm escapees: the Norwegian experience
(Journal article; Peer reviewed, 2010-03-31)Aquaculture management authorities require the ability to identify the farm of origin for escaped fish. Physical tagging is routinely conducted for domesticated animals (e.g. sheep and cattle); however, there are considerable ... -
Forensic identification of severely degraded Atlantic salmon (Salmo salar) and rainbow trout (Oncorhynchus mykiss) tissues
(Journal article; Peer reviewed, 2010-11-03)Aquaculture is a globally important and rapidly growing industry. It contributes positively to the economy and sustainability of coastal communities, but it is not without regulatory challenges. These challenges are diverse, ... -
Functional relationship between harp seal body condition and available prey in the Barents Sea
(Journal article; Peer reviewed, 2013-06-12)The Barents Sea ecosystem has undergone substantial ecological fluctuations over the past 40 yr, including large variations in the abundance of capelin Mallotus villosus, herring Clupea harrengus, krill Thysanoessa sp. and ... -
Genetic introgression of farmed salmon in native populations: quantifying the relative influence of population size and frequency of escapees
(Journal article; Peer reviewed, 2015-02-11)Farmed escapees may threaten the genetic integrity of native salmon populations through interbreeding. However, introgression requires survival until maturation, successful reproduction and successful early development. ... -
Grazing Rates of Calanus finmarchicus on Thalassiosira weissflogii Cultured under Different Levels of Ultraviolet Radiation
(Journal article; Peer reviewed, 2011-10-18)UVB alters photosynthetic rate, fatty acid profiles and morphological characteristics of phytoplankton. Copepods, important grazers of primary production, select algal cells based upon their size, morphological traits, ... -
High connectivity of salmon farms revealed by aggregation, residence and repeated movements of wild fish among farms
(Journal article; Peer reviewed, 2009-05-29)Marine fish farms are widespread in coastal waters throughout the world, yet how they modify the movement patterns of wild fish species is largely unknown. We determined the spatio-temporal distribution of saithe Pollachius ... -
Historical changes in macroalgal communities in Hardangerfjord (Norway)
(Journal article; Peer reviewed, 2013-10-15)Hardangerfjord is the second largest fjord in Norway and is situated on the southwest coast. During the last century the fjord has been influenced by a variety of anthropogenous activities such as industry, hydro-electrical ... -
HR MAS 1H NMR spectroscopy analysis of marine microalgal whole cells
(Journal article; Peer reviewed, 2003-07-17)To study the use of nuclear magnetic resonance (NMR) spectroscopy as a method of classification, we performed high-resolution magic angle spinning proton (HR MAS 1H) NMR spectroscopy analysis of whole-cell samples of ... -
Impact of climate on eel populations of the Northern Hemisphere
(Journal article; Peer reviewed, 2008-12-23)Glass eel abundances are declining worldwide. This has mostly been attributed to direct impacts of human activities such as overfishing or habitat loss and degradation, whilst the potential influence of changes in oceanic ... -
Impacts of wild fishes attracted to open-cage salmonid farms in Norway
(Journal article; Peer reviewed, 2014-12-02)Salmonid farming affects both the environment and other industries, with impacts of wild fish attracted to fish farms being a major concern. Here, we summarized existing knowledge on the impacts of such aggregations around ... -
Improved method for triacylglycerol-derived fatty acid profiling by various non-lethal and lethal sampling techniques in Atlantic salmon
(Journal article; Peer reviewed, 2013-11-14)The current paper compares the use of adipose fin and muscle biopsies as non-lethal sampling procedures, and the suitability of triacylglycerol (TAG) versus total lipid (TOT) fatty acid composition (fatty acid methyl esters, ... -
Individual-based modeling of feeding ecology and prey selection of larval cod on Georges Bank
(Journal article; Peer reviewed, 2009-02-11)Understanding larval fish survival dynamics is essential to determining variability in future adult population structure. Realistic modeling of larval fish feeding ecology depends on incorporating both the biotic and abiotic ... -
Influence of Different Factors on Abundance Estimates Obtained from Simultaneous Sonar and Echo Sounder Recordings
(Journal article; Peer reviewed, 2011-12-28)Use of horizontal guided sonar in addition to vertical echo sounder may improve biomass estimation of pelagic fish schooling near the surface. But proportions of horizontal guided sonar to vertical echo integration estimates ... -
Influence of oceanic factors on Anguilla anguilla (L.) over the twentieth century in coastal habitats of the Skagerrak, southern Norway
(Journal article; Peer reviewed, 2010-08-26)The European eel (Anguilla anguilla L.) is distributed all over Europe, but reproduction takes place in the Atlantic Ocean, in the Sargasso Sea. The population has been undergoing a steady decline since the 1980s. The eel ... -
Interactions between native and alien ctenophores: Beroe gracilis and Mnemiopsis leidyi in Gullmarsfjorden
(Journal article; Peer reviewed, 2011-01-31)We experimentally quantified predation rates between the native North Sea ctenophore Beroe gracilis and the introduced Mnemiopsis leidyi. A series of incubation experiments with varying M. leidyi prey concentrations (0.15 ... -
Linking behavioural ecology and oceanography: larval behaviour determines growth, mortality and dispersal
(Journal article; Peer reviewed, 2007-10-11)Highly resolved general circulation models (GCMs) now generate realistic flow fields, and have revealed how sensitive larval drift routes are to vertical positioning in the water column. Sensible representation of behavioural ... -
Major histocompatibility complex (MHC) variation and susceptibility to the sea louse Lepeophtheirus salmonis in Atlantic salmon Salmo salar
(Journal article; Peer reviewed, 2007-06-07)The relationship between genetic variation in major histocompatibility complex (MHC) Class I and II genes and susceptibility to sea lice Lepeophtheirus salmonis (Krøyer) in Atlantic salmon Salmo salar (L.) was studied ... -
Mating competition between farmed and wild cod Gadus morhua
(Journal article; Peer reviewed, 2010-08-18)Increasing numbers of hatchery-produced fish entering marine environments has caused concern over potential fitness depressions in wild populations, yet no study has addressed the likelihood of hybridisation between farmed ... -
Migration of Antarctic Minke Whales to the Arctic
(Journal article; Peer reviewed, 2010-12-22)The Antarctic minke whale (Balaenoptera bonaerensis), and the common minke whale found in the North Atlantic (Balaenoptera acutorostrata acutorostrata), undertake synchronized seasonal migrations to feeding areas at their ... -
Migratory behaviour and ocean survival of escaped out-of-season smolts of farmed Atlantic salmon Salmo salar
(Journal article; Peer reviewed, 2013-04-10)A large proportion of farmed Atlantic salmon Salmo salar L. smolts are produced under intensive rearing conditions. They reach smolt size and are transferred to net pens in seawater during their first autumn under a short ...