Blar i Brage IMR på forfatter "Naas, Kjell Emil"
-
A biotest system for optimalization of environmental parameters for production of halibut fry
Mangor-Jensen, Anders; Jelmert, Anders; Naas, Kjell Emil; Harboe, Torstein; Skiftesvik, Anne Berit (ICES CM Documents;1987/F:21, Working paper, 1987)A system for controlled testing of different environmental parameters in seawater was made. Both the biotest system and an experimental setup using larvae of the Atlantic Halibut (Hippoglossus hippoglossus L.) are described. -
A comparison of growth rate of halibut larvae (Hippoglossus hippoglossus L.) fed wild zooplankton and enriched Artemia
Skjolddal, Lillian; Harboe, Torstein; Næss, Tore Håkon; Naas, Kjell Emil; Rabben, Håvard (ICES CM Documents;1990/F:60, Working paper, 1990)Halibut larvae at an age of 267 day degrees post hatching, were reared through first feeding, outdoors in 100 l plastic bags. There were three feeding regimes: wild zooplankton, Artemia enriched on the algae Isochrysis ... -
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 ... -
Age of Atlantic halibut larvae (Hippoglossus hippoglossus L.) at first feeding
Harboe, Torstein; Næss, Tore Håkon; Naas, Kjell Emil; Rabben, Håvard; Skjolddal, Lillian (ICES CM Documents;1990/F:53, Working paper, 1990)Halibut larvae at different age (150 to 315 day-degrees) were transferred to outdoor startfeeding tanks each with two internal plastic bags (100 litre). The larvae were fed wild zooplankton. One bag was sampled after 24 ... -
Alger i vannet bedrar startfôringen hos marin fisk
Naas, Kjell Emil; Næss, Tore Håkon (Havforskningsnytt, Working paper, 1993) -
Betydning av hvilestadier for hoppekreps
Næss, Tore Håkon; Naas, Kjell Emil (Havforskningsnytt, Working paper, 1991) -
Bruk av mesokosmos som del av produksjonslinje for kveiteyngel
Næss, Tore; Naas, Kjell Emil (Rapport fra senter for havbruk;1993 Nr. 4, Working paper, 1993) -
Deepwater flowthrough as a temperature stabilizer in rearing of halibut (Hippoglossus hippoglossus) fry
Berg, Leif; Naas, Kjell Emil; Pittman, Karin (ICES CM Documents;1987/F:16, Working paper, 1987)Through the period of yolk sac absorption, halibut larvae were kept in plastic bags in plastic basins with flowthrough of deepwater. When maintaining sufficient flowthrough, in this period the temperature in the bags ... -
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, ... -
Flatfisk 86
Folkvord, Arild; Naas, Kjell Emil; Næss, H; Havforskningsinstituttet. Avdeling for akvakultur, Austevoll (Others, 1986) -
Green water in larviculture - An experiment with natural phytoplankton in tanks for first feeding of halibut larvae (Hippoglossus hippoglossus L.)
Næss, Tore Håkon; Bergh, Øivind; Harboe, Torstein; Naas, Kjell Emil; Rabben, Håvard; Skjolddal, Lillian (ICES CM Documents;1990/F:61, Working paper, 1990)At 232 day degrees, halibut larvae were transferred from indoor tanks to 1.7 m^3 outdoor tanks for first feeding. The number in each tank was approximately 750. Three tanks were continuously given algal suspension ("green ... -
Growth of scallop juveniles (Pecten maximus L.) in an enriched shallow seawater basin
Andersen, Sissel; Naas, Kjell Emil (ICES CM Documents;1990/K:23, Working paper, 1990)The aim of this work was to see if a shallow, enriched seawater basin was a suitable location for scallop culture. Growth of great scallop juveniles (Pecten maximus L.) was compared with two open sea locations, and the ... -
Havbruksrapport 1995
Naas, Kjell Emil (Fisken og havet, særnummer;3-1995, Research report, 1995-02) -
Illumination in first feeding tanks for marine fish larvae
Huse, Ingvar; Naas, Kjell Emil; Iglesias, Jose (ICES CM Documents;1992/F:6, Working paper, 1992)Illumination levels were measured in three artificially illuminated tanks: a black tank, a white tank and a tank with black sides and white bottom, in order to test how well normal tank illumination in different tank ... -
Incubation of halibut yolk sac larvae improved by addition of freshwater and oxygen
Holm, Jens Christian; Naas, Kjell Emil; Harboe, Torstein; Skår, Sjur Åge (ICES CM Documents;1998/L:14, Working paper, 1998)Halibut fry has been produced regularly by scientific and commercial institutions since late 80- ties. The yearly number of halibut fry produced have, however, not fulfllled the optimistic expectations. This could partly ... -
Induced deformities on larvae of the Atlantic halibut (Hippoglossus hippoglossus L.). A new experimental approach.
Jelmert, Anders; Naas, Kjell Emil (ICES CM Documents;1990/F:45, Working paper, 1990)Introduction: The atlantic halibut is viewed as a promising species for cold water aquaculture, and have been subjected to extensive research efforts both in Norway and in U.K. the later years. As the biology, and ... -
Initial feeding rates of Atlantic halibut larvae (Hippoglossus hippoglossus) at different prey densities
Naas, Kjell Emil; Mangor-Jensen, Anders (ICES CM Documents;1990/F:44, Working paper, 1990)At the end of yolksac stage (36 days after hatching) halibut larvae were offered the prey organism Artemia salina at different densities ranging from 1 to 100.000 litre ^- 1. The feeding experiment was carried out in 11 ... -
Morphological development of halibut (Hippoglossus hippoglossus) larvae with special reference to mouth development and metamorphosis
Pittman, Karin; Berg, Leif; Naas, Kjell Emil (ICES CM Documents;1987/F:18, Working paper, 1987)Halibut (Hippoglossus hippoglossus) larvae were raised from hatching to beyond metamorphosis in 11.5 m3 plastic bags with a temperature stable around 6°C. Standard length, myotome height, eye diameter and yolk sac length ... -
Natural and cultivated zooplankton as food for halibut (Hippoglossus hippoglossus) larvae
Naas, Kjell Emil; Berg, Leif; Klungsøyr, Jarle; Pittman, Karin (ICES CM Documents;1987/F:17, Working paper, 1987)Natural zooplankton were pumped into a collector and size-fractionated. The zooplankton smaller than 350 ym were fed on a diatom dominated algal suspension cultured in 3 m deep out-door plastic bags. Halibut larvae ... -
Plankton succession and responses to manipulations in a marine basin for larval fish rearing
Naas, Kjell Emil; van der Meeren, Terje; Aksnes, Dag Lorents (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 ...