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Blar i Brage IMR på forfatter "Macaulay, Gavin"

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    • Accuracy of the Kirchhoff-approximation and Kirchhoff-ray-mode fish swimbladder acoustic scattering models 

      Macaulay, Gavin; Pena, Hector; Fässler, Sacha M.M.; Pedersen, Geir; Ona, Egil (Journal article; Peer reviewed, 2013)
      The acoustic backscatter from pressure release prolate spheroids and a three-dimensional representation of a fish swimbladder (Chilean jack mackerel, Trachurus symmetricus murphyi) was calculated using four target strength ...
    • Acoustic micronektonic distribution and density is structured by macroscale oceanographic processes across 17–48° N latitudes in the North Atlantic Ocean 

      García-Seoane, Eva; Klevjer, Thor A.; Mork, Kjell Arne; Agersted, Mette Dalgaard; Macaulay, Gavin; Melle, Webjørn Raunsgård (Peer reviewed; Journal article, 2023)
      This study investigates the large-scale distribution patterns of the acoustic scattering layers and micronekton density across the Northeast Atlantic Ocean during daylight hours. A research cruise on board R/V “Kronprins ...
    • Akustisk fangstovervåking i not – Utfordringer og løsningsforslag til bedre metodikk 

      Tenningen, Maria; Øvredal, Jan Tore; Macaulay, Gavin (Rapport fra havforskningen;42-2018, Research report, 2018)
    • An acoustic method to observe the distribution and behaviour of mesopelagic organisms in front of a trawl 

      Underwood, Melanie; García-Seoane, Eva; Klevjer, Thor A.; Macaulay, Gavin; Melle, Webjørn Raunsgård (Peer reviewed; Journal article, 2020)
    • Antarctic krill (Euphausia superba) catch weight estimated with a trawl-mounted echosounder during fishing 

      Krafft, Bjørn Arne; Krag, Ludvig A.; Pedersen, Ronald; Ona, Egil; Macaulay, Gavin (Peer reviewed; Journal article, 2023)
      Reporting reliable catch weight estimates is important for all fisheries management. This study explores the potential for precise and direct estimation of catch weight (green weight) for the Antarctic krill (Euphausia ...
    • Comparisons of echo-integration performance from two different multiplexed echosounders 

      Macaulay, Gavin; Schoulding, Ben; Ona, Egil; Fässler, Sascha M. M. (Journal article; Peer reviewed, 2018)
      A time-series of acoustically derived aquatic biomass estimates relies on the acoustic equipment maintaining the same performance throughout the time-series. This is normally achieved through a regular calibration process. ...
    • CRISP- Toktrapport. Testing trålutstyr og instrumentering. G. O. Sars 1.-11. mars 2015 

      Valdemarsen, John Willy; Øvredal, Jan Tore; Aasen, Asbjørn; Engås, Arill; Rosen, Shale; Macaulay, Gavin; Mæstad, Odd Kjartan; Sæstad, Arvid; Nedrebø, Trond; Bærhaugen, Thor; Vågstøl, Håvard; Knotten, Vidar (Rapport fra havforskningen;10-2016, Research report, 2016)
    • 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 ...
    • Diel vertical movements determine spatial interactions between cod, pelagic fish and krill on an Arctic shelf bank 

      Skaret, Georg; Johansen, Geir Odd; Johnsen, Espen; Fall, Johanna Jennifer Elisabeth; Fiksen, Øyvind; Englund, Gøran; Fauchald, Per; Gjøsæter, Harald; Macaulay, Gavin; Johannesen, Edda (Peer reviewed; Journal article, 2020)
      Predator-prey spatial interactions are essential to understand ecosystem processes like predation rates and trophic interaction strength. In marine systems, such spatial interactions are highly dynamic and difficult to ...
    • Distribution and biomass estimation of Antarctic krill (Euphausia superba) off the South Orkney Islands during 2011-2020 

      Skaret, Georg; Macaulay, Gavin; Pedersen, Ronald; Wang, X.; Klevjer, Thor A.; Krag, L.A.; Krafft, Bjørn Arne (Peer reviewed; Journal article, 2023)
      Antarctic krill is a key species in the Southern Ocean and subject to the most extensive fishery in the Antarctic. The Norwegian Institute of Marine Research has conducted acoustic-trawl monitoring of krill off the South ...
    • Distribution and composition of mesopelagic macroplankton and micronekton in the North-east Atlantic 

      Garcia-Seoane, E.; Klevjer, Thor A.; Knutsen, Tor; Macaulay, Gavin; Mork, Kjell Arne; Rosen, Shale; Strand, Espen; Wienerroither, Rupert; Underwood, Melanie; Melle, Webjørn Raunsgård (Lecture, 2018)
    • Experimental evidence of threat-sensitive collective avoidance responses in a large wild-caught herring school 

      Rieucau, Guillaume; Boswell, Kevin M.; De Robertis, Alex; Macaulay, Gavin; Handegard, Nils Olav (Peer reviewed; Journal article, 2014)
      Aggregation is commonly thought to improve animals’ security. Within aquatic ecosystems, group-living prey can learn about immediate threats using cues perceived directly from predators, or from collective behaviours, for ...
    • Fisheries survey in the offshore wind power field Hywind Tampen before development 

      de Jong, Karen; McQueen, Kate; Hareide, Nils Roar; Tenningen, Maria; Macaulay, Gavin; Majaneva, Markus (Toktrapport;2022 - 15, Research report, 2023)
      The purpose of the cruise was to carry out a fish capture experiment in the area where a floating windfarm will be built to supply the oil and gas installations with renewable energy. The windfarm is located on the south ...
    • Instantaneous areal population density of entire Atlantic cod and herring spawning groups and group size distribution relative to total spawning population 

      Makris, Nicholas C.; Godø, Olav Rune; Yi, Dong Hoon; Macaulay, Gavin; Jain, Ankita Deepak; Cho, Byunggu; Gong, Zheng; Jech, J. Michael; Ratilal, Purnima (Journal article; Peer reviewed, 2018)
      The wide‐area group behaviour of spawning Atlantic cod and herring is investigated. By a combination of Ocean Acoustic Waveguide Remote Sensing (OAWRS) and conventional sensing methods, first‐look images of the instantaneous ...
    • Multinational large scale krill synoptic survey in CCAMLR Area 48 in 2019-survey plan and protocol for consideration by SG-ASAM 2018 

      Krafft, Bjørn Arne; Bergstad, Odd Aksel; Knutsen, Tor; Skaret, Georg; Macaulay, Gavin (CCAMLR;SG-ASAM-18/07, Research report, 2018)
      The objective for the Multinational Large-Scale Krill Synoptic Survey in CCAMLR area 48 3 in 2019 is to provide an updated estimate of the biomass of Antarctic krill (Euphausia 4 superba) used in models to estimate sustainable ...
    • Nonlinear crosstalk in broadband multi-channel echosounders 

      Khodabandeloo, Babak; Ona, Egil; Macaulay, Gavin; Korneliussen, Rolf (Peer reviewed; Journal article, 2021)
      Distortion of acoustic wave caused by nonlinear propagation transfers acoustic energy into higher harmonics of the transmitted signal. When operating several broadband echosounders with non-overlapping frequency bands to ...
    • Remote sizing of fish-like targets using broadband acoustics 

      Kubilius, Rokas; Macaulay, Gavin; Ona, Egil (Peer reviewed; Journal article, 2020)
    • Report from a krill focused survey with RV Kronprins Haakon and land-based predator work in Antarctica during 2018/2019 

      Krafft, Bjørn Arne; Bakkeplass, Kjell Gunnar; Berge, Terje; Biuw, Martin; Erices, Julio Alberto; Jones, Elizabeth Marie; Knutsen, Tor; Kubilius, Rokas; Kvalsund, Merete; Lindstrøm, Ulf; Macaulay, Gavin; Renner, Angelika; Rey, Alina; Søiland, Henrik; Wienerroither, Rupert; Ahonen, Heidi; Goto, Jade; Hoem, Nils; Huerta, Magdelena; Höfer, Juan; Iden, Oda; Jouanneau, William; Kruger, Lucas; Liholt, Håvard; Lowther, Andy; Makhado, Azwianewi B.; Mestre, Mireia; Narvestad, Audun; Oosthuisen, Chris; Rodrigues, Jose; Øyerhamn, Rune (Rapport fra havforskningen;2019 - 21, Research report, 2019)
      The primary objective for this krill research activity was twofold 1) to conduct a survey that provides updated estimates of the biomass and distribution of krill which are used in models to estimate sustainable yield in ...
    • Standing stock of Antarctic krill (Euphausia superba Dana, 1850) (Euphausiacea) in the Southwest Atlantic sector of the Southern Ocean, 2018-19 

      Krafft, Bjørn Arne; Macaulay, Gavin; Skaret, Georg; Knutsen, Tor; Bergstad, Odd A; Lowther, Andrew; Huse, Geir; Fielding, Sophie; Trathan, Philip; Murphy, Eugene; Choi, Seok-Gwan; Chung, Sangdeok; Han, Inwoo; Lee, Kyounghoon; Zhao, Xianyong; Wang, Xinliang; Ying, Yiping; Yu, Xiaotao; Demianenko, Kostiantyn; Podhornyi, Viktor; Vishnyakova, Karina; Pshenichnov, Leonid; Chuklin, Andrii; Shyshman, Hanna; Cox, Martin J; Reid, Keith; Watters, George M; Reiss, Christian S; Hinke, Jefferson T; Arata, Javier; Godø, Olav R; Hoem, Nils (Peer reviewed; Journal article, 2021)
      Estimates of the distribution and density of Antarctic krill (Euphausia superba Dana, 1850) were derived from a large-scale survey conducted during the austral summer in the Southwest Atlantic sector of the Southern Ocean ...

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