Browsing Brage IMR by Author "Bergstad, Odd Aksel"
Now showing items 1-20 of 47
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Acoustic manual for the krill synoptic survey in 2019
macaulay, gavin; Skaret, Georg; Knutsen, Tor; Bergstad, Odd Aksel; Krafft, Bjørn Arne (CCAMLR;WG-EMM-18/12, Research report, 2018)The previously presented document at the 2018 ASAM WG meeting (ASAM-18-07) described a design and plans for a synoptic krill acoustic survey in CCAMLR area 48 in 2019. The survey involves the collaborative efforts of Norway, ... -
Acoustic survey of deep-water fish of the Skagerrak
Bergstad, Odd Aksel; Gordon, John D.M.; Dalen, John (ICES CM Documents;1992/H:15, Working paper, 1992)Introduction: Two fish species, the greater silver smelt Argentina silus and the roundnose grenadier Coryphaenoides rupestris, are highly abundant in the deep-water areas of the Skagerrak. Since the 1970s, a small aimed ... -
Antarctic krill Euphausia superba: spatial distribution, abundance, and management of fisheries in a changing climate
McBride, Margaret; Stokke, Olav Schram; Renner, Angelika; Krafft, Bjørn Arne; Bergstad, Odd Aksel; Biuw, Martin; Lowther, Andrew; Stiansen, Jan Erik (Peer reviewed; Journal article, 2021)Antarctic krill Euphausia superba, a keystone species in the Southern Ocean, is highly relevant for studying effects of climate-related shifts on management systems. Krill provides a key link between primary producers and ... -
Biologiske ressurser i området som er aktuelt som trasé for kraftkabler fra Norge til kontinentet
Sundt, Rolf C.; Bergstad, Odd Aksel; Fossum, Petter; Ona, Egil (Interne notat, Working paper, 1995)Rapporten er utarbeidet på oppdrag fra Statkraft Engineering, i anledning planleggingen av linjenett for overføring av elektrisk kraft fra Norge til kontinentet. Utredningen er en del av arbeidet med å vurdere konsekvensene ... -
Deep-water resources of the Northeast Atlantic: distribution, abundance and exploitation
Bergstad, Odd Aksel; Isaksen, Bjørnar (Fisken og havet, Research report, 1987) -
Demersal fish assemblages in the boreo-Arctic shelf waters around Svalbard during the warm period 2007–2014
Bergstad, Odd Aksel; Johannesen, Edda; Høines, Åge Sigurd; Ellingsen, Kari Elsa; Lien, Vidar Surén; Byrkjedal, Ingvar; Yoccoz, Nigel Gilles; Tveraa, Torkild; Wienerroither, Rupert; Langhelle, Gunnar; Wenneck, Thomas de Lange (Peer reviewed; Journal article, 2017)The temporal and spatial resilience of abundance patterns of assemblages of organisms inhabiting transition zones between Arctic and boreal regions is an issue of concern in relation to climate change. The recognition that ... -
Development of methods relevant to feedback management (FBM) for the krill fishery
Krafft, Bjørn Arne; Lowther, Andrew; Macaulay, Gavin; Chierici, Melissa; Biuw, Martin; Renner, Angelika; klevjer, tor; Øyerhamn, Rune; cardenas, cecar; makhado, arata; Reiss, Christian; Bergstad, Odd Aksel (Research report, 2018)The primary objective for this project is to develop knowledge on the marine environment essential for the implementation of a Feed-Back Management (FBM) system. In terms of FBM, Marine Protected Area (MPA) development in ... -
Distribution, Population Biology, and Trophic Ecology of the Deepwater Demersal Fish Halosauropsis macrochir (Pisces: Halosauridae) on the Mid-Atlantic Ridge
Bergstad, Odd Aksel; Clark, Laura; Hansen, Hege Ø.; Cousins, Nicola (Journal article; Peer reviewed, 2012-02-22)Halosauropsis macrochir ranked amongst the most abundant and widespread demersal fishes on the mid-Atlantic Ridge of the North Atlantic (Iceland-Azores) with greatest abundance at 1700–3500 m. All sizes, ranging from 10–76 ... -
Does Presence of a Mid-Ocean Ridge Enhance Biomass and Biodiversity?
Bergstad, Odd Aksel; Falkenhaug, Tone; Høines, Åge (Journal article; Peer reviewed, 2013-05-02)In contrast to generally sparse biological communities in open-ocean settings, seamounts and ridges are perceived as areas of elevated productivity and biodiversity capable of supporting commercial fisheries. We investigated ... -
Egga Nord 2013. Toktrapport fra Havforskningsinstituttets tokt med FF G.O. Sars 15.10.–2.11.13
Bergstad, Odd Aksel; Harbitz, Alf; Hansen, Hege Øverbø; Heggebakken, Lise; Wienerroither, Rupert; Kristiansen, Arve; Dahl, Martin; Kristiansen, Jarle (Toktrapport/Havforskningsinstituttet;Nr. 2 - 2013, Working paper, 2013)Since 1994 a depth stratified annual bottom trawl survey was conducted along the continental slope (68-80°N, 400-1500 m) using chartered factory trawlers. The main focus since the start of the series was to describe the ... -
Feeding Ecology of Coryphaenoides rupestris from the Mid-Atlantic Ridge
Bergstad, Odd Aksel; Gjelsvik, Guro; Schander, Christoffer; Høines, Åge S. (Journal article; Peer reviewed, 2010-05-03)The Macrourid fish roundnose grenadier, Coryphaenoides rupestris, is one of the most common benthopelagic fishes on the northern mid-Atlantic Ridge. The ecology of the species is comparatively well studied in continental ... -
Fish communities on the slop of the eastern Norwegian Sea
Bergstad, Odd Aksel; Bjelland, Otte; Gordon, John D.M. (ICES CM Documents;1998/O:30, Working paper, 1998)Bortom trawl data from the depth interval 300-2050 m on the slope off Norway were analysed to study distribution of fish biomass and the associated species assemblages. It is hypothesised that the pronounced hydrographic ... -
Fishes of the Northern Mid-Atlantic Ridge collected during the MAR-ECO Cruise in June-July 2004. An annotated checklist.
Porteiro, Filipe M.; Sutton, Tracey T.; Byrkjedal, Ingvar; Orlov, Alexey; Heino, Mikko Petteri; Menezes, Gui Manuel Machado; Bergstad, Odd Aksel (Peer reviewed; Journal article, 2017) -
Forekomst og økologi til torsk, skrubbe, sjøørret og pelagisk fisk i Grenlandsfjordene
Bergstad, Odd Aksel; Knutsen, Jan Atle (Fisken og havet, Research report, 2000)Information on occurrence and feeding ecology of cod (Gadus morhua), flounder (Platichtys Jesus), anadromous brown trout (Salmo trutta), and epipelagic fish in the Grenland fjords (SE Norway) is reviewed. Emphasis in ... -
Frekvens av embryonal feilutvikling hos sild (Clupea harengus) fra en dioksinforurenset fjord (Frierfjorden, Telemark)
Bergstad, Odd Aksel; Knutsen, Jan Atle (Fisken og havet, Research report, 2004)As an element of comprehensive studies of effects on marine biota of dioxin pollution under the project "Dioxins in the Grenland fjords" (2000-2003), a comparative incubation experiment was carried out with herring (Clupea ... -
An illustrated manual for age reading of ling Molva molva L. and tusk Brosme brosme L. by otoliths
Bergstad, Odd Aksel; Hareide, Nils Roar (AldFisk report, Research report, 1997) -
Kartlegging av gyteplasser og sonderende oksygenmålinger i utvalgte fjorder i Risør, Tvedestrand og Lillesand kommune
Knutsen, Jan Atle; Bergstad, Odd Aksel; Gjøsæter, Jakob; Enersen, Svein Erik; Omli, Lena (Fisken og havet, Research report, 2000)This pilot project was initiated to compile and map old fishermen's local information on spawning areas of cod and other commercial fishes along the Norwegian Skagerrak Coast. Interviews revealed that fishermen had good ... -
Ling, blue ling and tusk of the North-East Atlantic
Bergstad, Odd Aksel; Hareide, Nils Roar (Fisken og havet, Research report, 1996)The longline fisheries for ling (Molva molva) and tusk (Brosme brosme) have long traditions in Norway. Blue ling (Molva dipterygia) was always a by-catch in Norwegian slope waters but about 15 years ago this species ... -
Man and the Last Great Wilderness: Human Impact on the Deep Sea
Ramirez-Llodra, Eva; Tyler, Paul A.; Baker, Maria C.; Bergstad, Odd Aksel; Clark, Malcolm R.; Escobar, Elva; Levin, Lisa A.; Menot, Lenaick; Rowden, Ashley A.; Smith, Craig R.; Van Dover, Cindy L. (Journal article; Peer reviewed, 2011-07-27)The deep sea, the largest ecosystem on Earth and one of the least studied, harbours high biodiversity and provides a wealth of resources. Although humans have used the oceans for millennia, technological developments now ... -
Mar-Eco expedition to the mid-Atlantic ridge [4/7 - 5/8, 2004]
Bergstad, Odd Aksel; Huse, Ingvar; Uiblein, Franz; Byrkjedal, Ingrid R.; Dolgov, Andrey V.; Fossen, Inge; Galbraith, John; Høines, Åge S.; King, Nicola; Klimpel, Sven; Menezes, Gui; Orlov, Alexei; Santos, Ricardo S.; Vecchione, Michael; Youngbluth, Marsh J.; Hosia, Aino; Sørnes, Tom; Stemmann, Lars; Gebruk, Audrey V.; Priede, Monty; Kemp, Kirsty; Knudsen, Øyvind ([Toktrapport/Havforskningsinstituttet];Nr. 20 - 2004, Working paper, 2004)