Blar i Published by IMR på forfatter "Gjøsæter, Jakob"
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Abundance and production of lanternfish (Myctophidae) in the western and northern Arabian Sea
Gjøsæter, Jakob (Fiskeridirektoratets skrifter, Serie Havundersøkelser, Research report, 1981)The mesopelagic fauna of the western and northern Arabian Sea between Mogadisco and the Indo-Pakistanean border was studied on cruises with R.V. "Dr. Fridtjof Nansen" during 1975-1976. A deep scattering layer was observed ... -
Akustiske undersøkelser i Oslofjorden og i Risør- og Kragerøområdet på den norske Skagerrakkysten i mai 1993
Gjøsæter, Jakob; Enersen, Kate; Enersen, Svein Erik ([Toktrapport/Havforskningsinstituttet];, Working paper, 1993) -
Akustiske undersøkelser i Risør- og Kragerøområdet på den norske Skagerrakkysten
Gjøsæter, Jakob; Enersen, Kate; Enersen, Svein Erik; Nakken, Odd (Rapport fra forskningsstasjonen Flødevigen;1993 Nr.2, Working paper, 1993) -
Algeoppblomstringen i Skagerrak i mai 1988 : Ettervirkninger på på fisk og bunnfauna langs Sørlandskysten
Johannessen, Tore; Gjøsæter, Jakob (Flødevigen meldinger;Nr. 6 - 1990, Working paper, 1990) -
Algeoppblomstringen i Skagerrak i mai 1988, effekter på bunnfauna på Sørlandskysten
Gjøsæter, Jakob; Johannessen, Tore (Flødevigen meldinger, Working paper, 1988) -
Annual report 1987 of the project "Cultivation of catfish"
Moksness, Erlend; Gjøsæter, Jakob; Johannessen, Tore (Working paper, 1988) -
Beskatning av sjøørret i sjø på Skagerrakkysten og i Oslofjorden (Et forprosjekt)
Gjøsæter, Jakob; Knutsen, Jan Atle; Knutsen, Henry; Aass, Asbjørn; Sollie, Aadne (Fisken og havet, Research report, 1996)The basis for the pilot project was today's official fishing statistics which show a catch of sea trout in the sea in the order of size 1 tonne/year for the Skagerrak Coast and the Oslofjord. This is not in accordance ... -
Bunnfisk på den norske kontinentalskråning
Bakken, Erling; Lahn-Johannessen, John; Gjøsæter, Jakob (Fisken og havet;1975 - Nr.2, Research report, 1975)Investigations of distribution and abundance of demersal fish in 400—1000 m depth were carried out in three selected areas off Norway in July—August 1974. Based on catches in 48 hauls by bottom trawl and 3 longline settings ... -
Competition for food and predator-prey relationships among young cod (Gadus Morhua) and some other fish from shallow waters. In: Flødevigen rapportserie no 1, 1988
Gjøsæter, Jakob (Flødevigen rapportserie, Research report, 1988)Experiments were conducted to study food competition between young cod (20-30 cm) and some other fish from shallow waters. When food was dropped from the surlace the cod took much more than the other species, but ... -
Dykkerobservasjoner ved Arendal og Risør under algeoppblomstringen i mai 1988
Hop, Haakon; Danielssen, Didrik S.; Gjøsæter, Jakob; Paulsen, Øystein (Flødevigen meldinger, Working paper, 1988) -
Ecological investigations on the spawning grounds of the Barents Sea capelin
Sætre, Roald; Gjøsæter, Jakob (Fiskeridirektoratets skrifter, Serie Havundersøkelser, Research report, 1975)SÆTRE, R. and GJØSÆTER, J. 1975. Ecological investigations on the spawning grounds of the Barents Sea capelin. FiskDir. Skr. Ser. HavUnders., 16: 203-227. A programme to study the reproduction of the Barents Sea capelin ... -
Estimates of stock size and reproduction of the Barents Sea capelin in 1970-1972
Dragesund, Olav; Gjøsæter, Jakob; Monstad, Terje (Fiskeridirektoratets skrifter, Serie Havundersøkelser, Research report, 1973)DRAGESUND, O., GJØSÆTER, J. and MONSTAD, T. 1973. Estimates of stock size and reproduction of the Barents Sea capelin in 1970-1972. FiskDir. Skr. Ser. HavUnders., 16: 105-139. The distribution and migration of young ... -
Estimates of the abundance of mesopelagic fish off southern Norway and west of the British Isles 1971-1976. In: Flødevigen rapportserie no 1, 1986
Gjøsæter, Jakob (Flødevigen rapportserie, Research report, 1986)Mesopelagic fish were studied using 38 and 50 kHz echo sounders and electronic integrators on cruises covering the Norwegian Deep, Skagerrak, the slope north of the North Sea and west of the British Isles during 1971-1976. ... -
Ettervirkninger av oppblomstringen av giftige alger i Skagerrak i mai 1988
Johannessen, Tore; Gjøsæter, Jakob (Havforskningsnytt, Working paper, 1993) -
Fecundity and egg size of spring spawning Barents Sea capelin
Gjøsæter, Jakob; Monstad, Terje (Fiskeridirektoratets skrifter, Serie Havundersøkelser, Research report, 1973)Fecundity of Barents Sea capelin was studied in 1971 and 1972. No differences were found between these two years. The regression line log F = 3.4871 x log L - 0.2049 was fitted to the whole material. This is in good ... -
Feeding behaviour of Diaphus dumerilii in NW Africa with notes on its relations to other myctophids in the area. In: Flødevigen rapportserie no 1, 1988
Alwis, Ajanta de; Gjøsæter, Jakob (Flødevigen rapportserie, Research report, 1988)The feeding pattern of D. dumerilii was studied based on material collected by R/V "Dr. Fridtjof Nansen" from west Africa (from Mauritania to Nigeria-Congo area and the Cape Verde Islands) in 1981. The other species. ... -
Fiskerekruttering og miljøforhold i strandsonen langs den norske Skagerrakkysten høsten 1992
Sollie, Aadne; Gjøsæter, Jakob (Rapport fra forskningsstasjonen Flødevigen;1993 Nr.3, Working paper, 1993) -
Fiskerekruttering og miljøforhold i strandsonen langs den Norske Skagerrakkysten høsten 1994
Sollie, Aadne; Gjøsæter, Jakob (Fisken og havet, Research report, 1995)Some important fish species as cod, pollack and whiting have their nursery areas in the littoral zone. A study of the abundance of these species in the littoral zone can therefore give an indication of recruitment. Studies ... -
Fiskeressurser i Oslofjorden : undersøkelser i 1993-1995
Gjøsæter, Jakob (Fisken og havet, Research report, 1997)Distribution and abundance of cod, Gadus morhua L., and other fish species was studied during two cruises with R.V.«G.M.Dannevig in the Oslofjord, one in May 1993 and one in September 1995. Simrad EK-500 echosounder (38 ... -
Fiskeressurser i ytre Oslofjord sammenlignet med resten av den norske Skagerrakkysten
Gjøsæter, Jakob; Danielssen, Didrik S. (Fisken og havet, Research report, 2004)The stock density of adult cod and other demersal fishes in the Outer Oslofjord is lower than on the rest of the Skagerrak coast, and also lower in this area. The fry production seems not to be reduced, but the fish disappear ...