Browsing Brage IMR by Author "Solemdal, Per"
Now showing items 1-20 of 60
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The behaviour of whiting (Gadus merlangus) in relation to long lines
Fernö, Anders; Tilseth, Snorre; Solemdal, Per (ICES CM Documents;1977/B:44, Working paper, 1977) -
Behaviour studies on fish reaction to long lines
Tilseth, Snorre; Solemdal, Per; Fernö, Anders (ICES CM Documents;1978/B:22, Working paper, 1978)This study is a continuation of a field investigation on the behaviour of fish towards long lines, started in 1976. The present paper gives an analysis of the effect of current and time of the day on the activity of whiting ... -
Biochemical genetic identification and population genetic studies of marine fish eggs. In: The propagation of cod Gadus morhua L.: an international symposium, Arendal, 14 - 17 June 1983
Mork, Jarle A.; Solemdal, Per; Sundnes, Gunnar (Flødevigen rapportserie, Conference object, 1984)The visually indistinguishable eggs of various fish species may be identified by species-specific zymograms. Polymorphic loci in identified eggs permit estimation of allele-frequencies for use in population structure ... -
A case study on the distribution of cod larvae and availability of prey organisms in relation to physical processes in Lofoten. In: The propagation of cod Gadus morhua L.: an international symposium, Arendal, 14 - 17 June 1983
Ellertsen, Bjørnar; Fossum, Petter; Solemdal, Per; Sundby, Svein; Tilseth, Snorre (Flødevigen rapportserie, Conference object, 1984)The distribution of cod larvae and copepod nauplii off the Lofoten islands was studied in the years 1979-82. The highest concentrations of cod larvae and copepod nauplii were found in the Austnesfjord, Hølla-Henningsvær ... -
A comparison of egg quality and larval viability between cultured coastal cod and wild arcto-norwegian cod
Solemdal, Per; Kjesbu, Olav Sigurd; Opstad, Ingegjerd; Skiftesvik, Anne Berit; Birkeland, R.; Bratland, Per; Fonn, Merete (ICES CM documents;1991/F:41;, Working paper, 1991)Experiments on cod eggs revealed an inverse relationship between egg diameter and mortality. Further, larvae hatching from small eggs showed a redeuced feeding ability. Other methods to characterice larval viability ... -
The 'critical period' concept - a century of recruitment research
Ellertsen, Bjørnar; Fossum, Petter; Solemdal, Per; Sundby, Svein (Others, 1995-11-23) -
Da vi vant i Haag III. Jens Evensen - med folkeretten i kofferten
Solemdal, Per (Journal article, 1994-10) -
Da vi vant i Haag. Del 1. Bakgrunn og dommen
Solemdal, Per (Journal article, 1994-04) -
Da vi vant i Haag. Del 2. Fire personer som arbeidet bak kulissene
Solemdal, Per (Journal article, 1994-10) -
Demonstration of maternal effects of Atlantic cod: Combining the use of unique mesocosm and novel molecular techniques – A new EU-project
Svåsand, Terje; Ajiad, Adnan Mosa; Dahle, Geir; Jakobsen, Tore; Kjesbu, Olav Sigurd; Moksness, Erlend; Otterå, Håkon; Solemdal, Per; Thorsen, Anders (ICES CM documents, Working paper, 2000)One of the effects of fishing is a reduction in average age and size in exploited fish stocks, leading to an increasing proportion of recruit spawners in the stock. Current management practice assumes equal viability of ... -
Early development of Northeast Arctic greenland halibut (Reinhardtius hippoglossoides)
Stene, Anne; Gundersen, Agnes C.; Albert, Ole Thomas; Solemdal, Per; Nedreaas, Kjell Harald (ICES CM Documents;1998/O:27, Working paper, 1998)The early development of the Greenland halibut (Reinhardtius hippoglossoides) has never been described in detail. This study contains some preliminary notes on the egg development of the Northeast Arctic Greenland halibut ... -
The effect of biological and physical factors on the survival of Arcto-Norwegian cod and the influence on recruitment variability
Ellertsen, Bjørnar; Fossum, Petter; Solemdal, Per; Sundby, Svein; Tilseth, Snorre (PINRO-IMR Symposium, Conference object, 1987)Data from egg and larval field investigations h the Lofoten area are used together with long time series of data on temperature and zooplankton in Lofoten and abundance indices of Arcto-Norwegian cod. The importance ... -
Egg mortality in recruit- and repeat-spawning cod: an experimental study
Solemdal, Per; Kjesbu, Olav Sigurd; Fonn, Merete (ICES CM documents, Working paper, 1995)Experiments on the reproduction of individual Norwegian coastal cod and for the Arcto-Norwegian cod were conducted during the years 1982-92, and the year 1995 respectively. The experimental fish used were held in captivity ... -
The egg production of Arcto-Norwegian cod (Gadus morhua L.) in the Lofoten area estimated by egg surveys
Sundby, Svein; Solemdal, Per (PINRO-IMR Symposium, Conference object, 1984)Spawning intensity measurements have been executed in Lofoten each year since 1976. They consist of egg net samples at selected spawning cites . In 1983, in addition, four quasi-synoptic egg surveys were conducted during ... -
Ei sild - og ei til. 1. Krigsoppfinnelse og havforskning - sildas verste fiender ?
Solemdal, Per (Journal article, 1995-05) -
Ei sild, og ei til. V. Færøyane, halvvegs til Island
Solemdal, Per (Journal article, 1996-05) -
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 ... -
Festskrift Per Solemdal 60 år
Solemdal, Per (Book, 2001-02-08) -
Field studies on the behaviour of whiting (Gadus merlangus L.) towards baited hooks
Fernö, Anders; Solemdal, Per; Tilseth, Snorre (Fiskeridirektoratets skrifter, Serie Havundersøkelser, Research report, 1986)The responses of whiting to a test line with baited hooks were studied during three cruises in the Trondheimsfjord area in three seasons. The activity of the fish directed towards the baited hooks increased at sunrise ... -
Fish behaviour in relation to long lines observed by TV
Fernö, Anders; Johannessen, Arne; Olsen, Kjell; Solemdal, Per; Tilseth, Snorre; Valdemarsen, John Willy (ICES CM Documents;1976/B:38, Working paper, 1976)