Blar i Brage IMR på forfatter "Fossum, Petter"
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Selective mecanisms of significance in the survival of fish
Fossum, Petter (Fisken og havet, Research report, 1995)The adult fish can during the reproductive process select for three different parameters; 1- time of spawning, 2- location of spawning, and 3- egg size. In this work all three parameters are discussed, but particular ... -
Sildelarvetokt [10/4 - 27/4, 2000]
Fossum, Petter ([Toktrapport/Havforskningsinstituttet];, Working paper, 2000-05-30) -
Sildelarvetokt [7/4 - 24/4, 1999]
Fossum, Petter ([Toktrapport/Havforskningsinstituttet];, Working paper, 1999-06-10) -
Sildelarvetokt [8/4 - 25/4, 2002]
Fossum, Petter ([Toktrapport/Havforskningsinstituttet];Nr. 10, Working paper, 2002-06-12) -
Sildelarvetokt [9/4 - 25/4, 1996]
Fossum, Petter ([Toktrapport/Havforskningsinstituttet];, Working paper, 1996-07-01) -
Sildelarvetokt: 3/4 - 19/4, 1995
Fossum, Petter ([Toktrapport/Havforskningsinstituttet];, Working paper, 1995-06-01) -
Sildelarveundersøkelsene i 1988 [HELP 32]
Bjørke, Herman; Ellertsen, Bjørnar; Fossum, Petter; Sætre, Roald (help, Research report, 1990)Denne rapporten gir endel foreløbige resultater fra gytefeltundersøkelsene hos sild i mars-april 1988. Den tar for seg den horisontale og vertikale fordeling av sildelarver i forhold til miljøfaktorene såvel som vekst ... -
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 ... -
A staging system for larval cod (Gadus morhua L.)
Fossum, Petter (Fiskeridirektoratets skrifter, Serie Havundersøkelser, Research report, 1986)A staging system of larval cod is described. The system is based on the resorption of the yolk mass and the cell layers surrounding it combined with eye, mouth and gut development. A determination key is given. Each stage ... -
Studies on herring larvae off western Norway in 1986
Fossum, Petter; Bjørke, Herman; Sætre, Roald (help, Research report, 1987)This report gives some preliminary results from a study on the spawning grounds of the Norwegian spring-spawning herring in April 1986. It deals with the horizontal and vertical distribution of herring larvae in relation ... -
Studies on herring larvae off western Norway in 1987 [HELP 22]
Sætre, Roald; Bjørke, Herman; Fossum, Petter (help, Research report, 1988)This report gives some preliminary results from a study on the spawning grounds of the Norwegian spring-spawning herring in April 1987. It deals with the horizontal and vertical distribution of herring larvae in relation ... -
Sult under larvestadiet - en viktig rekrutteringsmekanisme? [HELP 6]
Fossum, Petter (help, Research report, 1987) -
Survey report [8/3 - 23/3, 2004]
Fossum, Petter ([Toktrapport/Havforskningsinstituttet];Nr. 1 - 2004, Working paper, 2004) -
A tentative method to estimate mortality in the egg and early fish larval stages, with special reference to cod (Gadus morhua L.)
Fossum, Petter (Fiskeridirektoratets skrifter, Serie Havundersøkelser, Research report, 1988)A tentative method to estimate egg and larval mortality is demonstrated. The material was sampled during the cod egg and larvae surveys in the Lofoten area in the years 1983 and 1984. Correct ageing of eggs and larvae, ... -
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 ... -
De tidlige livsstadiene hos fisk i møte med trusselen fra petroleumsvirksomheten. [HELP sluttrapport]
Fossum, Petter; Øiestad, Victor (help, Research report, 1992)Gjennomføringen av HELP har gitt en betydelig økt innsikt i de tidlige livsstadiene hos en rekke kommersielle fiskeslag i nordlige farvann. Norskarktisk hyse og sei visste en spesielt lite om før start, og en har nå kunnet ... -
Toktrapport [12/5 - 23/5, 1988]
Fossum, Petter ([Toktrapport/Havforskningsinstituttet];, Working paper, 1988-05-26) -
Toktrapport [14/6 - 21/6, 1992]
Bakkeplass, Kjell; Fossum, Petter ([Toktrapport/Havforskningsinstituttet];, Working paper, 1992-09-01) -
Toktrapport [15/6 - 28/6, 1990]
Fossum, Petter ([Toktrapport/Havforskningsinstituttet];, Working paper, 1990-07-03)