Browsing Brage IMR by Author "Nævdal, Gunnar"
Now showing items 1-20 of 60
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A study of genetic variation in northeast Atlantic harp seals (Pagophilus groenlandicus)
Meisfjord, Jørgen; Fyllingen, Inger; Nævdal, Gunnar (ICES CM Documents;1991/N:5, Working paper, 1991)16 enzymes were examined for genetic studies of the harp seal population structure in the Northeast Atlantic. Muscle and liver samples were collected in the West Ice off Jan Mayen and in the Eastern Barents Sea in 1987, ... -
Bunnfiskundersøkelser i Nord-Norge og Barentshavet første halvår 1970
Hylen, Arvid; Lahn-Johannessen, John; Nævdal, Gunnar (Fisken og havet, Research report, 1972)In the present report is given an account of field work with preliminary results of investigations on demersal fish species during the first months of 1970 in northern Norway and in the Barents Sea. The report is primarily ... -
Causes of variation in carcass traits of Atlantic salmon (Salmo salar)
Torrissen, Ole; Hansen, Tom; Torrissen, Krisna Rungruangsak; Nævdal, Gunnar (ICES CM Documents;1984/F:25, Working paper, 1984)The aim of the present study was to reveal causes of variation in carcass traits of farmed Atlantic salmon (Salmo salar). During slaughtering of one year class Atlantic salmon, composed of half sib and full sib groups, ... -
Comparison of blood proteins from east and west Atlantic populations of Hippoglossoides platessoides
Nævdal, Gunnar; Bakken, Erling (Fiskeridirektoratets skrifter, Serie Havundersøkelser, Research report, 1974)Hemoglobins, serum proteins and serum esterase of Hippoglossoides platessoides from the eastern and western part of the North Atlantic were analyzed by gel-electrophoresis. Great variety were observed among specimens, ... -
Comparison of blood proteins of coalfish from Norwegian and Icelandic waters
Møller, Dag; Nævdal, Gunnar (Fiskeridirektoratets skrifter, Serie Havundersøkelser, Research report, 1974)Blood samples of coalfish from Norwegian and Icelandic waters were collected and analyzed for hemoglobin, serum protein, and serum esterase variations in order to study the relation between the two coalfish stocks. Clear ... -
Differentiation between "marinus" and "mentella" types of redfish by electrophoresis of haemoglobins
Nævdal, Gunnar (Fiskeridirektoratets skrifter, Serie Havundersøkelser, Research report, 1978)Haemoglobins of 225 specimens of redfish from the Barents Sea and 357 specimens from Icelandic waters were analysed by electrophoresis to search for genetic differences between the morphologian marinus and mentella ... -
Differentiation between "marinus" and "mentella" types of redfish by electrophoresis of hemoglobins
Nævdal, Gunnar (ICES CM Documents;1971/F:26, Working paper, 1971) -
Distribution of multiple forms of lactate dehydrogenase, aspartate aminotransferase and serum esterase in herring from Norwegian waters
Nævdal, Gunnar (Fiskeridirektoratets skrifter, Serie Havundersøkelser, Research report, 1970)1. By use of combined starch and agar gel electrophoresis 10 samples (1258 specimens) were studied for serum esterase polymorphism, 13 samples (1454 specimens) for lactate dehydrogenase (LDH) polymorphism~ and one sample ... -
Distribution of multiple forms of lactate dehydrogenase, aspartate aminotransferase and serum esterase in herring samples from Norwegian waters
Nævdal, Gunnar (ICES CM Documents;1969/16, Working paper, 1969) -
Electrophoretic studies of redfish (Genus sebastes) from Icelandic and Greenland waters
Nedreaas, Kjell Harald; Nævdal, Gunnar; Johansen, Torild (ICES CM Documents;1992/G:36, Working paper, 1992)Sebastes spp. from Icelandic and Greenland waters were analysed for biochemical genetic variation by agar gel and starch gel electrophoresis. The main emphasize was put on S. marinus, but the oceanic type S. mentella ... -
Enzyme polymorphism of sprat from Norwegian waters - preliminary results
Jørstad, Knut Eirik; Nævdal, Gunnar (ICES CM Documents;1981/H:65, Working paper, 1981) -
Erfaring med bruk av ytre merker på oppdrettsfisk
Nævdal, Gunnar; Holm, Marianne; Knutsson, Sten (Fisken og havet - Serie B, Working paper, 1977) -
Esterase variation in herring studied by isoelectric focusing
Nævdal, Gunnar; Thorkildsen, Solveig; Lemvig, Svend (ICES CM Documents;1997/AA:1, Working paper, 1997)Few suitable genetic characteristics for studying herring population structure are available, and the main aim of the study reported here has been to reveal traits which display useful genetic variations for application ... -
Experiments with selective breeding of Atlantic salmon
Nævdal, Gunnar; Holm, Marianne; Møller, Dag (ICES CM Documents;1975/M:22, Working paper, 1975) -
Further studies on blood protein polymorphism in sprat
Nævdal, Gunnar (Fiskeridirektoratets skrifter, Serie Havundersøkelser, Research report, 1970) -
Genetic studies on released and recaptured cod in a fjord system
Jørstad, Knut Eirik; Nævdal, Gunnar (ICES CM Documents;1992/G:65, Working paper, 1992)The study reported here is part of a more extensive investigation on the effects of mass rearing and release of 0-group cod in fjords and coastal areas in Norway. Each year since 1987 pond produced cod have been liberated ... -
Genotype distributions of cod from the Norwegian Skagerrak coast
Gjøsæter, Jakob; Jørstad, Knut Eirik; Nævdal, Gunnar; Thorkildsen, Solveig (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 ... -
Growth rate and age at sexual maturity of Atlantic salmon smoltifying aged one and two years
Nævdal, Gunnar; Bjerk, Øyvind; Holm, Marianne; Lerøy, Rita; Møller, Dag (Fiskeridirektoratets skrifter, Serie Havundersøkelser, Research report, 1979)Post-smolt growth rate and age at first maturation are compared for sib groups or population groups of salmon originating from Norwegian rivers and fish farms. Generally, high correlations were found between corresponding ... -
Growth rate and age at sexual maturity of Atlantic salmon smoltifying at one and two years of age
Nævdal, Gunnar; Bjerk, Øyvind; Holm, Marianne; Lerøy, Rita; Møller, Dag (ICES CM Documents;1978/F:23, Working paper, 1978)Postsmolt growth rate and age at first maturation are compared for sibgroup or population groups of salmon originating from Norwegian rivers and fish farms. Generally high correlations were found between corresponding ... -
Haemoglobins in sprat from Norwegian waters, studied by agar-gel electrophoresis
Nævdal, Gunnar (ICES CM Documents;1966/J:7, Working paper, 1966)