Browsing Brage IMR by Author "Helle, Kristin"
Now showing items 1-20 of 22
-
A framework for improving accuracy in fisheries data used in stock assessments
Pennington, Michael; Vigneau, Joel; Helle, Kristin; Vølstad, Jon Helge (ICES CM documents;2008/N:27, Working paper, 2009) -
Blålangegenetikk – Genetiske undersøkelser av blålange langs Eggakanten og i utvalgte fjorder
Helle, Kristin; Sanchez, Maria Quintela; Johansen, Torild (Rapport fra havforskningen;20-2018, Research report, 2018)Et intenst fiskepress på blålange på 1970- og 1980-tallet førte til alvorlig overbeskatning. Bestanden synes å være i så dårlig forfatning at den i 2006 ble satt på den norske Rødlisten. For å sikre gjenoppbygging av ... -
Current patterns during pelagic stages determine interannual variability in length-at-age of juvenile Arcto-Norwegian cod
Ottersen, Geir; Helle, Kristin; Bogstad, Bjarte (ICES CM documents, Working paper, 2001) -
Do abiotic mechanisms determine interannual variability in length-at-age of juvenile Arcto-Norwegian cod?
Ottersen, Geir; Helle, Kristin; Bogstad, Bjarte (Journal article; Peer reviewed, 2002)For the large Arcto-Norwegian stock of cod (Gadus morhua L.) in the Barents Sea, year-to-year variability in growth is well documented. Here three hypotheses for the observed inverse relation between abundance and the mean ... -
Do two-year-old Arcto-Norwegian cod remain in the area where they settled?
Helle, Kristin (ICES CM documents, Working paper, 2001) -
Does the midnight sun increase the feeding rate and hence the growth rate of early juvenile Arcto-Norwegian cod Gadus morhua in the Barents Sea?
Helle, Kristin (Journal article; Peer reviewed, 2000-05-12)The growth rate of Arcto-Norwegian cod juveniles in the Barents Sea during their first 4 mo of life is about twice that of cod juveniles in areas farther south, such as Georges Bank and the Flemish cap. Cod larvae and ... -
Dypvannsfisk i Førdefjorden. Sannsynlighet for miljøkonsekvenser for bestander av dypvannsfisk som følge av dypvannsdeponi av gruveavgang fra rutil-utvinning i Engebøfjellet, Naustdal kommune
Bjelland, Otte; Helle, Kristin (Rapport fra Havforskningen;Nr.9-2008, Working paper, 2008-11)Nordic Mining ASA planlegger å utvinne rutil fra en forekomst i Engebøfjellet på nordsiden av Førdefjorden i Naustdal kommune i Sogn og Fjordane. Tiltaket er konsekvens-utredningspliktig etter bestemmelser i Plan- og ... -
Electronic catch registration onboard commercial fishing vessels for commercial and scientific use
Gundersen, Agnes C.; Dyb, Jan Erik; Boje, Jesper; Hjörleifsson, Einar; Helle, Kristin (ICES CM documents;2009/L:16, Working paper, 2009)In assessment and management of marine fish resources, representative data of statistically good quality describing the actual catch are lacking for many fisheries. Even for the most studied fisheries in the north Atlantic, ... -
Estimates of effort, CPUE, and mean length for the Norwegian commercial catch of ling, blue ling and tusk
Helle, Kristin; Pennington, Michael (Working paper, 2010) -
Evaluating CPUE series generated by the Norwegian longline fleet for the period 2000-2009
Helle, Kristin; Pennington, Michael; Gundersen, Agnes C. (Conference object, 2010-08) -
An evaluation of recruitment indices for Northeast Arctic cod (Gadus morhua L.)
Helle, Kristin; Bogstad, Bjarte; Marshall, C. Tara; Michalsen, Kathrine; Ottersen, Geir; Pennington, Michael (ICES CM documents, Working paper, 1999)Indices of the abundance of Northeast Arctic cod (Gadus morhua L.) for various life stages were compared in order to determine the earliest stage at .which year-class strength is established. The indices considered are: ... -
Fishery changes and implications - need for a wider approach to address socioeconomical effects in fisheries management
Gundersen, Agnes C.; Helle, Kristin; Nystrand, Bjørn Tore; Oterhals, Oddmund; Kjerstad, Margareth; Yttredal, Else Ragn; Herse, Øyvind (ICES CM Documents;2010/M:27, Conference object, 2010)Probabilistic maturation reaction norms (PMRN) were used to investigate changes in the maturation of sardine cohorts and to discuss whether genetic effects, environmental effects or both are plausible explanations of ... -
Innspill til høring - Forslag til program for konsekvensutredning for mineralvirksomhet på norsk sokkel
van der Meeren, Terje; Mork, Kjell Arne; Kutti, Tina; Knutsen, Tor; Bagøien, Espen; Frie, Anne Kirstine Højholt; Gjøsæter, Harald; Bienfait, André Marcel; Storesund, Julia Endresen; Dunlop, Katherine Mary; Windsland, Kristin; Hallfredsson, Elvar H.; Helle, Kristin; Höffle, Hannes; Junge, Claudia; Serigstad, Bjørn; Chierici, Melissa (Rapport fra havforskningen;2021 - 23, Research report, 2021)Rapporten er et høringssvar sendt til Olje- og Energidepartementet i forbindelse med et forslag til konsekvensutredningsprogram for mineralvirksomhet på norsk kontinentalsokkel. I høringssvaret påpeker Havforskningsinstituttet ... -
Kveite i norske farvann. Status og utfordringer for forvaltning og forskning
Høines, Åge S.; Bjelland, Otte; Michalsen, Kathrine; Vølstad, Jon Helge; Helle, Kristin; Vollen, Tone; Nedreaas, Kjell Harald; Albert, Ole Thomas (Rapport fra Havforskningen;Nr.1-2009, Working paper, 2009-05)Kveite, eller atlantisk kveite og hvitkveite som den også kalles for å skille den fra blåkveite, er den største beinfisken i norske farvann og har i alle år hatt en spesiell status i fiskeri og folkeminne. Som mange andre ... -
Prey selection of early juvenile cod (Gadus morhua L.) in the Barents Sea
Helle, Kristin (ICES CM documents, Conference object, 2006) -
Prey selection of early juvenile cod (Gadus morhua L.) in the Barents Sea
Helle, Kristin (ICES CM documents, Conference object, 2006) -
Some environmental factors that influence the growth of Arcto-Norwegian cod from the early juvenile to the adult stage
Helle, Kristin; Bogstad, Bjarte; Ottersen, Geir; Pennington, Michael (ICES CM documents, Working paper, 2000)A high growth rate for Arcto-Norwegian cod (Gadus morhua L.) in the Barents Sea and adjacent areas from the larval stage to the 0-group stage enhances survival and ultimately recruitment to the fishery. However, it appears ... -
The Influence of Biological and Physical Processes on Early Juvenile Arcto-Norwegian Cod (Gadus morhua L.) with Special Emphasis on Zooplankton Abundance
Helle, Kristin (Doctoral thesis, 2000) -
The post-war evolution of the Norwegian longline fishery for ling and tusk
Helle, Kristin; Pennington, Michael (ICES CM documents;2011/D:03, Working paper, 2011) -
The relation between the spatial distribution of early juvenile cod (Gadus morhua L.) and zooplankton biomass in the Barents Sea
Helle, Kristin; Pennington, Michael (ICES CM Documents;1997/T:32, Working paper, 1997)The year class strength of Arcto-Norwegian cod (Gadus morhua L.) in the Barents Sea is extremely variable. One of the key indicators for a possible strong year class is water temperature since good year classes may be ...