Blar i ICES CM documents authored by IMR scientists (1949-2011) på forfatter "Fossum, Petter"
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A study of first feeding herring (Clupea harengus L.) larvae during the period 1985- 1993
Fossum, Petter (ICES CM Documents;1993/H:21, Working paper, 1993)Hatching and distribution of first feeding larvae of Norwegian spring spawning herring have been monitored on the Norwegian shelf in March and April since 1985. During this period the spawning stock increased from 0.5 ... -
Distinguishing between spring and autumn spawned herring from daily increments, a preliminary report
Fossum, Petter; Moksness, Erlend (ICES CM Documents;1988/H:15, Working paper, 1988)Otoliths from Norwegian Spring Spawning herring larvae, collected on a cruise in May 1985 and North Sea Autumn Spawned herring larvae, collected on a cruise in Desember 1987, were examined for daily increments. A greater ... -
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 ... -
Estimated hatching date and growth history of Norwegian spring spawning herring (Clupea harengus L.) from otolith data of larvae of the 1990 yearclass
Fossum, Petter; Moksness, Erlend (ICES CM Documents;1991/H:14, Working paper, 1991)This study was performed on herring larvae of the 1990 yearclass of Norwegian spring spawners. The larvae were caught in May on the Norwegian shelf in the area from 64 °N - 69 °N. There was one size group of larvae with ... -
Feeding conditions of north-east Arctic (Arcto-Norwegian) cod larvae compared to the Rothschild-Osborn theory on small-scale turbulence and plankton contact rates
Sundby, Svein; Fossum, Petter (ICES CM Documents;1989/G:19, Working paper, 1989)Data on first feeding North-east arctic cod larvae in Lofoten, sampled during the period 1976 - 1984, are examined to verify the theory on the influence of microturbulence on the contact rate between predator and prey ... -
Field and laboratory studies of herring larvae (Clupea harengus L.)
Fossum, Petter; Johannessen, Arne (ICES CM Documents;1979/H:28, Working paper, 1979)The present study deals with herring larvae from a local herring stock in Lindåspollene, north of Bergen. Growth and survival experiments of herring larvae in relation to density and type of prey organisms have been ... -
Initial results from the 2004 ichthyoplankton survey of the North Sea
Fox, Clive J.; Taylor, M.; Dickey-Collas, Mark; van Damme, Cindy J. G.; Bolle, L. J.; Daan, N.; Rohlf, N.; Kraus, G.; Munk, Peter; Fossum, Petter; Bailey, N. (ICES CM documents;2005/AA:04, Working paper, 2005)In 2004 an international consortium comprising England, Scotland, Netherlands, Germany, Denmark and Norway conducted an ichthyoplankton survey covering the whole of the North Sea in order to comprehensively survey cod ... -
On the site-specific role of the central Norwegian shelf for the recruitmen strategy of the Norwegian spring spawning herring
Eriksrød, Gro; Fossum, Petter; Skogen, Morten D.; Svendsen, Einar; Sætre, Roald (ICES CM documents, Working paper, 1998) -
Size selective mortality in Norwegian spring spawning herring juveniles?
Husebø, Åse; Stenevik, Erling Kåre; Slotte, Aril; Vikebø, Frode; Folkvord, Arild; Fossum, Petter (ICES CM documents, Working paper, 2005)The growth-mortality hypothesis, where survival during the larval stage is positively related to size, is tested for Norwegian spring spawning herring (Clupea harengus L.). The daily increment width in the otoliths is ... -
The squid Todarodes sagittatus (Lamark) : Distribution and biology in northern waters, August 1981 - April 1982
Wiborg, Kristian Fredrik; Gjøsæter, Jakob; Beck, Inger Marie; Fossum, Petter (ICES CM documents;1982/K:30, Working paper, 1982)Since 1977 the squid Todarodes sagittatus has invaded the Norwegian coast and adj acent areas every year. Materials for investigation were collected from August 1981 to April 1982. In coastal areas the mean dorsal mantle ... -
The recovery of the Barents Sea capelin (Mallotus villosus) from a larval point of view
Fossum, Petter (ICES CM Documents;1991/H:13, Working paper, 1991)The recovery of the Barents Sea Capelin is studied with larval surveys in the period 1986-91. Very few larvae were found in 1986,1987 and 1988, but the abundance of capelin larvae increased from 1989 back to the ... -
Variability of the drift patterns of spring spawned herring larvae and the transport of water along the Norwegian shelf
Svendsen, Einar; Fossum, Petter; Skogen, Morten D.; Eriksrød, Gro; Bjørke, Herman; Nedreaas, Kjell Harald; Johannessen, Arne (ICES CM Documents;1995/Q:25, Working paper, 1995)Summary: A 3-dimensional baroclinic hydrodynamic model implemented for the North Sea, the Norwegian coast and part of the Norwegian and Barents Seas has been run for 18 years. This model has been used to study the Norwegian ...