Blar i Published externally på forfatter "Bergstad, Odd Aksel"
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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, ... -
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 ... -
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 ... -
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 ... -
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) -
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 ... -
Notes on age determination, size and age structure, longevity and growth of co-occurring macrourid fishes
Bergstad, Odd Aksel; Hunter, Rebecca H.; Cousins, Nicola J.; Bailey, David M.; Jørgensen, Terje (Peer reviewed; Journal article, 2021)Nineteen species of the deep-water fish family Macrouridae inhabit the Mid-Atlantic Ridge (MAR) of the North Atlantic. Size and age structure, longevity and length at age were explored for seven of the more abundant species: ... -
Numerous Sublinear Sets of Holes in Sediment on the Northern Mid-Atlantic Ridge Point to Knowledge Gaps in Understanding Mid-Ocean Ridge Ecosystems
Vecchione, Michael; Bergstad, Odd Aksel (Peer reviewed; Journal article, 2022)On 13 July 2004, during an expedition exploring biodiversity along the northern Mid-Atlantic Ridge, an ROV dive recorded videos of numerous sublinear sets of holes in sediment at ca. 2,082 m depth. The location was north ... -
Population genetic structure in a deepwater fish Coryphaenoides rupestris: patterns and processes
Knutsen, Halvor; Jorde, Per Erik; Bergstad, Odd Aksel; Skogen, Morten D. (Journal article; Peer reviewed, 2012-07-24)We observed significant genetic structure in a widely distributed North Atlantic demersal deepwater fish, the roundnose grenadier Coryphaenoides rupestris (Pisces: Macro - uridae). The overall estimate of genetic ...