Browsing Brage IMR by Author "Øiestad, Victor"
Now showing items 1-20 of 31
-
A genetic marker for artificially reared cod (Gadus morhua L.)
Jørstad, Knut Eirik; Øiestad, Victor; Paulsen, Ole Ingar; Naas, Kjell Emil; Skaala, Øystein (ICES CM Documents;1987/F:22, Working paper, 1987)Artificially reared cod at the Aquaculture Station Austevoll on the west coast of Norway, were screened for genetic markers by using biopsies of white muscle, individual tags and enzyme genotype as determined by starch ... -
Application of larval fish population dynamics in enclosure systems in production of marine fish fry
Øiestad, Victor (ICES CM Documents;1983/F:6, Working paper, 1983) -
Criteria for condition evolved from enclosure experiments with cod larva populations. In: The propagation of cod Gadus morhua L.: an international symposium, Arendal, 14 - 17 June 1983
Øiestad, Victor (Flødevigen rapportserie, Conference object, 1984)A number of experiments have been carried out with cod larvae in mesocosms at variable feeding conditions. Larval growth and survival has been monitored beyond metamorphosis, and in some of the experiments large ... -
Effect of turbulence and different types of fertilizers on phytoplankton and oyster larvae (Ostrea edulis) in mesocosms
Naas, Kjell Emil; Berg, Leif; Øiestad, Victor (ICES CM Documents;1986/K:41, Working paper, 1986)Different types of inorganic fertilizers were added to five cubic metres plastic bags. Different turbulent regimes were established in the bags. The effects of these manipulations on nutrient salts, chlorophyll a, ... -
Feeding and vertical distribution of cod larvae in relation to availability of prey organisms
Ellertsen, Bjørnar; Solemdal, Per; Sundby, Svein; Tilseth, Snorre; Westgård, Trond; Øiestad, Victor (Conference object, 1979)The year-class strength of the Arcto-Norwegian cod stock varies on an annual basis by a factor of about 20:1 and is determined at the 0-group stage (about 1/2 year old cod). Since the number of eggs spawned far exceeds the ... -
Fjordranching with conditioned cod
Midling, Kjell; Kristiansen, Tore S.; Ona, Egil; Øiestad, Victor (ICES CM Documents;1987/F:29, Working paper, 1987)In June 1986, 1600 pond-reared one-year old cod were released into a fjord after being conditioned with a pulsed 160 Hz sound signal to search for food at a feeding location. Echosounders, UW-video and ultrasonic ... -
Forskningsstrategi på fiskens tidlige livsfaser
Øiestad, Victor (Rapport/Notat Biologisk og Kjemisk Oseanografi;Nr. BKO 8906, Working paper, 1989-09-01) -
Growth and survival studies of halibut (Hippoglossus hippoglossus L.) from hatching to beyond metamorphosis carried out in mesocosms
Berg, Leif; Øiestad, Victor (ICES CM Documents;1986/F:16, Working paper, 1986)To each of five floating plastic bags 1500 halibut larvae were transferred from the hatchery one day after hatching. The plastic bags had a volume of 11.5 m3, a total depth of 5.5 m and they were moored to floating ... -
Growth and survival studies on 0-group plaice (Pleuronectes platessa L.) in a small basin with a closed ecosystem
Øiestad, Victor; Iversen, Svein A.; Danielssen, Didrik S. (Fiskeridirektoratets skrifter, Serie Havundersøkelser, Research report, 1978)A growth and survival experiment on 0-group plaice was carried out in a small basin during the summer of 1976. The volume of the basin was about 25 m³, and the seawater was left stagnant during the summer. Of the initial ... -
Growth patterns in otoliths as an indication of daily growth variations of larval herring (Clupea harengus) from an experimental ecosystem
Gjøsæter, Harald; Øiestad, Victor (ICES CM Documents;1981/H:31, Working paper, 1981)Larval herring were released in a large outdoor basin four days after hatching and the mean growth in length and weight of the herring larvae and fry was monitored for 100 days. The food supply was estimated from weekly ... -
The influence of light and food density on the feeding success in larvae of cod (Gadus morhua L.); field and laboratory observations
Ellertsen, Bjørnar; Moksness, Erlend; Solemdal, Per; Strømme, Tore; Tilseth, Snorre; Øiestad, Victor (ICES CM Documents;1976/F:34, Working paper, 1976) -
Konsekvenser av klimaendringer for fiskeri- og havbruksnæringen : bidrag til den interdepartementale klimautredningen
Øiestad, Victor (Fisken og havet, Research report, 1990)De forventinger som knytter seg til en klimaendring i våre områder er nedfelt i to anslag for temperaturstigning, et høyt anslag med stigninger av lufttemperaturen på 3,O-3,5°C om vinteren og 1,5-2,5°C om sommeren og et ... -
Large-scale rearing of cod fry (Gadus morhua) in an inlet
Øiestad, Victor (ICES CM Documents;1981/F:11, Working paper, 1981) -
Large-scale rearing of cod fry on the natural food production in an enclosed pond. In: The propagation of cod Gadus morhua L.: an international symposium, Arendal, 14 - 17 June 1983
Kvenseth, Per Gunnar; Øiestad, Victor (Flødevigen rapportserie, Conference object, 1984)For four years (1980-1983) populations of 5 day old cod larvae have been transferred to a dammed seawater pond (60 000 m^3 ). The water volume had been treated with rotenone in advance, and the larvae were released ... -
Large-scale rearing of cod fry on the natural food production in enclosed pond
Kvenseth, Per Gunnar; Øiestad, Victor (Flødevigen rapportserie, Research report, 1983-06) -
Mass production of juvenile Atlantic cod (Gadus morhua L.) in a pond: results and new approaches in 1985
Folkvord, Arild; Kvenseth, Per Gunnar; Pedersen, Torstein; Øiestad, Victor (ICES CM Documents;1985/F:63, Working paper, 1985)Large scale production of juvenile Atlantic cod has been carried out since 1980. A break-through was obtained in 1983 with high survival rates of cod larvae to metamorphosis. This year we have tried to solve two remaining ... -
Mass-production of cod fry (Gadus morhua L.) in a large basin in western Norway - a new approach
Øiestad, Victor; Kvenseth, Per Gunnar; Pedersen, Torstein (ICES CM Documents;1984/F:16, Working paper, 1984)In February 1984, the fresh water in a small lake was replaced by seawater pumped from 40 m depth. Four-day old cod larvae were transferred on 11 and 26 April into this seawater basin, which was 5 m above sea level with ... -
Mass-production of cod fry in a pond in western Norway, with additional feeding post-metamorphosis
Øiestad, Victor; Kvenseth, Per Gunnar; Folkvord, Arild (ICES CM Documents;1983/F:5, Working paper, 1983) -
Merkeforsøk med 0-gruppe kysttorsk (Gadus morhua L.) drettet opp i et utendørs basseng
Moksness, Erlend; Øiestad, Victor (Fisken og havet, Research report, 1980)Coastal cod, (Gadus morhua L.), hatched in the laboratory and reared in a large outdoor basin at Statens Biologiske Stasjon Flødevigen, have been tagged and released in coastal waters in southern Norway, in 1976 and ... -
Petroleumsvirksomhet utenfor kysten av Midt-Norge. Konsekvenser for fiskeressursene. [HELP 33]
Øiestad, Victor (help, Research report, 1990)