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Plankton succession and responses to manipulations in a marine basin for larval fish rearing
(Journal article; Peer reviewed, 1991-08-08)A marine basin was constructed in order to provide fish larvae a natural environment for growth and survival. In nature, similar enclosed systems are limited by stagnant water and anoxic conditions. Consequently, 3 types ... -
Determining the extinction cross section of aggregating fish
(Journal article; Peer reviewed, 1992)When fish are aggregated over a flat bottom, and fish and bottom echoes can be distinguished, it is possible to determine the fish extinction cross section by a simple application of the echo integration method. The theory ... -
Cleaning symbiosis as an alternative to chemical control of sea lice infestation of Atlantic salmon
(World Aquaculture Workshops;No. 4, Conference object, 1992) -
Concentrations of iron, copper, zinc and selenium in liver of salmon Salmo salar infected with Vibrio salmonicida
(Journal article; Peer reviewed, 1992-02-17)Lethal infections with Vibrio salmonicida result in a significant reduction in liver concentrations of iron, copper, and selenium expressed as mg kg-1 wet wt liver. Infections also increase liver weight as the hepatic ... -
Residues of oxolinic acid in wild fauna following medication in fish farms
(Journal article; Peer reviewed, 1992-02-17)Dispersion of oxolinic acid and occurrence of Aeromonas salmonicida in wild fauna were studied in animals captured in the vicinity of 2 aquaculture facilities during and after medication with this drug. Consumption of ... -
Genotype distributions of cod from the Norwegian Skagerrak coast
(Journal article; Peer reviewed, 1992-02-20)The genotype distributions for cod, Gadus morhua L., from the southeastern coast of Norway are studied as part of a more extensive study on cod enhancement and the possible effects of mass liberation of 0-group cod on ... -
Oceanographic conditions in the Sandsfjord system, western Norway, after a bloom of toxic prymnesiophyte Prymnesium parvum Carter in August 1990
(Journal article; Peer reviewed, 1992-02-20)As in 1989 the algal bloom was toxic and mortal to Atlantic salmon and rainbow trout in fish-farms. The brachish layer, with salinities between 5 and 25 %o, was characterized by a high N : P ratio reflecting the low ... -
Demersal assemblages of the continental shelf and upper slope of Angola
(Journal article; Peer reviewed, 1992-04-21)The structure of the demersal assemblages (fish, crustaceans and cephalopods) of the continental shelf and upper slope of Angola (ca 5 to 17-degrees-S) was studied based on the trawl survey of the RV `Dr. Fridtjof Nansen' ... -
Persistence of infectious pancreatic necrosis virus (IPNV) in scallops Pecten maximus
(Journal article; Peer reviewed, 1992-04-23)Infectious pancreatic necrosis virus (IPNV), serotype N1 isolated from scallops Pecten maximus in Norway, was propagated and used in both inoculation and bath challenge experiments with scallops in vivo. Although virus ... -
Study of the demersal assemblages of the continental shelf and upper slope off Congo and Gabon, based on the trawl surveys of the RV 'Dr Fridtjof Nansen'
(Journal article; Peer reviewed, 1992-08-27)The structure of the demersal assemblages (fish, crustaceans and cephalopods) of the continental shelf and upper slope off Congo and Gabon (from about 1 to 5-degrees-S) was studied based on the trawl survey of the RV 'Dr ... -
Relative merits of using numbers and biomass in fish community studies
(Journal article; Peer reviewed, 1992-08-27)In descriptions of fish communities, the question of which measure of abundance should be used, whether numbers or biomass, has never been addressed. While both measures are often available, the common practice is to use ... -
Changes in plasma and liver glutathione levels in Atlantic salmon Salmo salar suffering from infectious salmon anemia (ISA)
(Journal article; Peer reviewed, 1992-10-08)The levels of reduced glutathione (GSH) in plasma and liver in healthy Atlantic salmon Salmo salar and salmon suffering from infectious salmon anaemia (ISA) were measured using high-performance liquid chromatography (HPLC). ... -
Ecosystem model for evaluating potential cod production in a west Norwegian fjord
(Journal article; Peer reviewed, 1992-12-08)The carrying capacity for cod in a Norwegian fjord was analysed by means of a simulation model. Four age groups of cod were represented as well as the main prey groups labrids, gobies and benthic organisms. These groups ... -
Hepatic EROD activity in dab Limanda limanda the German Bight using an improved plate-reader method
(Journal article; Peer reviewed, 1992-12-31)During the Bremerhaven Workshop an improved, fast and easy method for the determination of ethoxyresorufin-O-deethylase (EROD) activity in dab Limanda limanda liver was tested. The improvement involved the use of a 12500 ... -
Eutrophication and algal growth in the North Sea. In: Symposium Mediterranean Seas 2000
(Conference object, 1993)The North Sea is a shallow shelf sea with an area of 0.6 million km^2, surrounded by densely populated land areas. The general water circulation is counter-clockwise, and an annua1 freshwater input of 400 km^3 results ... -
Further analysis of target strength measurements of Antarctic krill at 38 and 120 kHz: Comparison with deformed cylinder model and inference of orientation distribution
(Journal article; Peer reviewed, 1993)Data collected during the krill target strength experiment [J. Acoust. Soc. Am. 87, 16–24 (1990)] are examined in the light of a recent zooplankton scattering model where the elongated animals are modeled as deformed finite ...