Blar i Brage IMR på forfatter "Bjørke, Herman"
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A method to estimate the annual larval production of the Norwegian spring-spawning herring (Clupea harengus L.)
Liang, Xingming; Bjørke, Herman (ICES CM Documents;1997/BB:1, Working paper, 1997)A comprehensive survey in the larval distribution area of Norwegian spring-spawning herring along the Norwegian west coast was carried out annually by the Institute of Marine Research, Bergen in the years 1986-1990. ... -
Abundance indices for the Arcto-Norwegian cod for the period 1979 -1986 based on investigations in June/July
Bjørke, Herman; Sundby, Svein (ICES CM Documents;1986/G:75, Working paper, 1986)Postlarvae Surveys have been carried out in the western part of the Barents Sea in June/July since 1977. The aim of the investigations has been to study the distribution pattern of fish larvae and their relation to the ... -
Abundance indices for the arcto-norwegian cod in 1979-1986 based on larvae investigations [HELP 5]
Bjørke, Herman; Sundby, Svein (help, Research report, 1987) -
Assessment of potential oil pollution damages on fish resources. Some examples from the area outside mid-Norway
Føyn, Lars; Bjørke, Herman (ICES CM Documents;1987/E:13, Working paper, 1987)Detailed mapping of fish eggs and larvae both in space and time is essential knowledge when realistic assessments of oil pollution damages to the fish resources are established. The text explain with some examples our ... -
Distribution and abundance indices of postlarval and 0-group cod
Bjørke, Herman; Sundby, Svein (PINRO-IMR Symposium, Conference object, 1987)Postlarvae surveys have been carried out in the southwestern part of the Barents Sea and the northeastern part of the Norwegian Sea in June/July since 1971, The aim of the Investigations has been to study characteristic ... -
Distribution and abundance of post larval Northeast Arctic cod and haddock
Bjørke, Herman; Sundby, Svein (PINRO-IMR Symposium, Conference object, 1984)From 1977 onwards an annua1 postlarvae survey has been carried out off northern Norway in June/July. The aim is to study the distribution of fish larvae, and to establish an index for thom 53m to surface. In 1983 the ... -
Distribution of eggs and larvae of gadoid fishes from Stad to Lofoten during April 1976-1982. In: The propagation of cod Gadus morhua L.: an international symposium, Arendal, 14 - 17 June 1983
Bjørke, Herman (Flødevigen rapportserie, Conference object, 1984)Fish eggs and larvae have been sampled during the study of herring larvae distribution. Since 1976 these findings have been recorded. Most of the gadoid eggs are difficult to identify, but identification of larvae and ... -
Distribution, drift and condition of herring larvae off western Norway in 1985
Bjørke, Herman; Fossum, Petter; Sætre, Roald (ICES CM Documents;1986/H:39, Working paper, 1986)The recruitment to the Norwegian spring-spawning herring have during the last twenty years been on a very low level. However, the size of the spawning stock has increased in recent years and in 1983 a rich year class ... -
Distribution, drift and condition of herring larvae off western Norway in 1987
Sætre, Roald; Bjørke, Herman; Fossum, Petter (ICES CM Documents;1988/H:14, Working paper, 1988)Introduction: After 1959 the Norwegian spring-spawning herring have been spawning along the western coast of Norway north of 62° N. During the sixties the stock was reduced to a minimum. In the recent years there has ... -
Diving observations on Barents Sea capelin at its spawning grounds off the coast of northern Norway
Bakke, Sigmund; Bjørke, Herman (ICES CM Documents;1971/H:25, Working paper, 1971) -
Diving observations on Barents Sea capelin at the spawning grounds off northern Norway
Bakke, Sigmund; Bjørke, Herman (Fiskeridirektoratets skrifter, Serie Havundersøkelser, Research report, 1973)During the spring of 1971 divers made observations at the spawning grounds of the Barents Sea capelin. Large masses of capelin eggs were found at two localities: Loppa, (35-70 m depth) and Nordvågen (12-18 m depth). The ... -
Drift of capelin larvae - a population sink?
Bjørke, Herman; Gjøsæter, Harald; Loeng, Harald (ICES CM Documents;1988/H:54, Working paper, 1988) -
Dykkender beiter på loddeegg
Gjøsæter, Jakob; Sætre, Roald; Bjørke, Herman (Journal article, 1972-09) -
Factors determining the year-class strength of Norwegian spring spawning herring
Krysov, Alexander; Bjørke, Herman; Svendsen, Einar (PINRO-IMR Symposium, Conference object, 1995)More than 30 years of Russian and Norwegian data on spring-spawning herring larvae along the coast of Norway has been investigated and analyzed together with different environmental parameters and spawning stock size. ... -
Food and feeding of young herring larvae of Norwegian spring spawners
Bjørke, Herman (Research report, 1978)The gut contents of young herring larvae sampled each hour from 3 to 9 April 1967 at three depth intervals around a floating drogue were examined to study their feeding. Copepod eggs constituted more than 90% of the food ... -
Food and feeding of young herring larvae of Norwegian spring spawners
Bjørke, Herman (ICES CM Documents;1976/H:36, Working paper, 1976)The gut contents of young herring larvae sampled each hour from 4 to 9 April 1967 around a floating drogue at three depth intervals were examined to study their feeding. Copepod eggs constituated more than 90% of the ... -
The food of herring larvae of Norwegian spring spawners
Bjørke, Herman (ICES CM Documents;1968/Sy:5, Working paper, 1968) -
Forekomsten av fiskeegg fra Stad til Gimsøy i februar-april 1987 [HELP 16]
Bjørke, Herman; Bakkeplass, Kjell; Hansen, Karsten (help, Research report, 1988)I perioden 1712-1714 1987 ble det foretatt undersøkelser på kontinentalsokkelen fra Stad til Gimsøy for å lokalisere gytefeltene for sei. Ved hjelp av isoelektrisk fokusering kunne fiskeegg som ikke lar seg artsbestemme ... -
Import av fiskeyngel til norske farvann?
Bjørke, Herman (Havforskningsnytt, Working paper, 1994) -
"Import" av fiskeyngel til norske farvann [HELP 35]
Bjørke, Herman; Sætre, Roald (help;1990 nr. 35, Research report, 1990)Fordelingen av fiskeyngel i norske farvann om våren og sommeren indikerer sterkt at noe av denne yngelen er "importert" fra gytefelt utenfor det økosystemet som omfatter norskekysten og Barentshavet. Dette gjelder for ...