Blar i Brage IMR på forfatter "Melle, Webjørn Raunsgård"
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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 ... -
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) -
Application of an unsupervised clustering algorithm on in situ broadband acoustic data to identify different mesopelagic target types
Agersted, Mette Dalgaard; Khodabandeloo, Babak; Liu, Yi; Melle, Webjørn Raunsgård; Klevjer, Thor Aleksander (Peer reviewed; Journal article, 2021)The mesopelagic zone (200–1000 m depth) contains high fish species diversity but biomass and abundances are uncertain yet essential to understand ecosystem functioning. Hull-mounted acoustic systems (usually 38 kHz) often ... -
Biogeographical patterns of meso- and bathypelagic fish along a Northeastern Atlantic transect
Garcia Seoane, Eva; Wienerroither, Rupert; Mork, Kjell Arne; Underwood, Melanie; Melle, Webjørn Raunsgård (Peer reviewed; Journal article, 2021)The influence of oceanographic variables on assemblages of meso- and bathypelagic fish was investigated along a Northeastern Atlantic Ocean transect (Cape Verde to the Bay of Biscay) during May 2019. Fish were collected ... -
Biogeography of key mesozooplankton species in the North Atlantic and egg production of Calanus finmarchicus
Melle, Webjørn Raunsgård; Runge, Jeffrey A.; Head, Erica J.H.; Plourde, Stéphane; Castellani, Claudia; Licandro, Priscilla; Pierson, James; Jónasdóttir, Sigrún Huld; Johnson, Catherine Lynn; Broms, Cecilie; Debes, Høgni Hammershaib; Falkenhaug, Tone; Gaard, Eilif; Gislason, Astthor; Heath, Michael R.; Niehoff, Barbara; Nielsen, Torkel Gissel; Pepin, Pierre; Stenevik, Erling Kåre; Chust, Guillem (Journal article; Peer reviewed, 2015-08-26)Here we present a new, pan-North-Atlantic compilation of data on key mesozooplankton species, including the most important copepod, Calanus finmarchicus. Distributional data of eight representative zooplankton taxa, from ... -
Calanus finmarchicus basin scale life history traits and role in community carbon turnover during spring
Jónasdóttir, Sigrún H; Naustvoll, Lars Johan; Teglhus, Frederik Wolff; Agersted, Mette Dalgaard; Grenwald, Julie C; Melle, Webjørn Raunsgård; Nielsen, Torkel Gissel (Peer reviewed; Journal article, 2022)The copepod Calanus finmarchicus was investigated in four Subpolar Basins, Labrador, Irminger, Iceland, and Norwegian Seas, during spring, covering the time of ascent, grazing, and initiation of reproduction in the area. ... -
Can mesopelagic mixed layers be used as feed source for salmon aquaculture ?
Olsen, Rolf Erik; Strand, Espen; Melle, Webjørn Raunsgård; Nørstebø, Jo Trelvik; Lall, Santosh P.; Tocher, Douglas R.; Sprague, Matthew (Journal article; Peer reviewed, 2019)Salmon aquaculture is in great need of good quality balanced protein and lipid sources, particularly marine omega-3 (n-3) long-chain polyunsaturated fatty acids (LC-PUFA), to sustain a further development of the industry. ... -
Can morphology reliably distinguish between the copepods Calanus finmarchicus and C. glacialis, or is DNA the only way?
Choquet, Marvin; Kosobokova, Ksenia; Kwaśniewski, Sławomir; Hatlebakk, Maja Karoline Viddal; Dhanasiri, Anusha Krishanthi Shyama; Melle, Webjørn Raunsgård; Daase, Malin; Svensen, Camilla; Søreide, Janne; Hoarau, Galice Guillaume (Peer reviewed; Journal article, 2018)Copepods of the genus Calanus play a key role in marine food webs as consumers of primary producers and as prey for many commercially important marine species. Within the genus, Calanus glacialis and Calanus finmarchi- cus ... -
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) -
Dynamics of phytoplankton species composition, biomass and nutrients in the North Atlantic during spring and summer - A trans-Atlantic study
Naustvoll, Lars Johan; Melle, Webjørn Raunsgård; Klevjer, Thor A.; Drinkwater, Kenneth F.; Strand, Espen; Knutsen, Tor (Peer reviewed; Journal article, 2020)During a return trip in May–June 2013 from Bergen, Norway, to Nuuk, Greenland, on the Institute of Marine Research's R/V “G. O. Sars”, four ocean basins, the Norwegian, Iceland, Irminger and Labrador seas, were surveyed ... -
Ecology of mesozooplankton across four North Atlantic basins
Strand, Espen; Klevjer, Thor A.; Melle, Webjørn Raunsgård; Knutsen, Tor (Peer reviewed; Journal article, 2020)A comparative study of the mesozooplankton in four North Atlantic basins is presented. During a trans-Atlantic expedition with R/V G.O. Sars in May and June 2013, the Norwegian Sea, Iceland Sea, Irminger Sea and Labrador ... -
Estimating target strength and physical characteristics of gas-bearing mesopelagic fish from wideband in situ echoes using a viscous-elastic scattering model
Khodabandeloo, Babak; Agersted, Mette Dalgaard; Klevjer, Thor Aleksander; Macaulay, Gavin John; Melle, Webjørn Raunsgård (Peer reviewed; Journal article, 2021)Wideband (38 and 50–260 kHz) target strength of organisms were measured in situ using a towed platform in mesopelagic (200–1000 m depth) layers. Organisms with a gas-inclusion are strong scatterers of sound and acoustically ... -
Exploring Growth Patterns of Maurolicus muelleri across Three Northeast Atlantic Regions
Alvarez, Paula; Aldanondo, Naroa; Wieczorek, Alina M.; Cariou, Thibault; Boyra, Guillermo; Grimaldo, Eduardo; Melle, Webjørn Raunsgård; Klevjer, Thor A. (Peer reviewed; Journal article, 2024)Maurolicus muelleri is an important component of mesopelagic ecosystems; nevertheless, we possess only limited knowledge about its biological features. We collected samples of M. muelleri from six scientific surveys between ... -
Feeding ecology of Benthosema glaciale across the North Atlantic
Knutsen, Tor; Strand, Espen; Klevjer, Thor A.; Salvanes, Anne Gro Vea; Broms, Cecilie; Sunde, Synne Myhre; Aksnes, Dag Lorents; García-Seoane, Eva; Melle, Webjørn Raunsgård (Peer reviewed; Journal article, 2023)The glacier lanternfish Benthosema glaciale is a key myctophid with a wide distribution in the northern Atlantic. It is a species that has a strong vertical migration capacity and have the potential to move between the ... -
Feeding interactions between Atlantic salmon (Salmo salar) postsmolts and other planktivorous fish in the Northeast Atlantic
Utne, Kjell Rong; Thomas, Katie; Jacobsen, Jan Arge; Fall, Johanna Jennifer Elisabeth; Maoiléidigh, Niall Ó.; Broms, Cecilie Thorsen; Melle, Webjørn Raunsgård (Peer reviewed; Journal article, 2020) -
Fine-scale observations of physical and biological environment along a herring feeding migration route
Melle, Webjørn Raunsgård; Klevjer, Thor A.; Strand, Espen; Wiebe, Peter H.; Slotte, Aril; Huse, Geir (Peer reviewed; Journal article, 2020)We observed herring horizontal and vertical distribution during feeding migration along a 128 km transect across the Arctic front of the Norwegian and Iceland seas, in early June, in relation to its physical, chemical and ... -
Genetics redraws pelagic biogeography of Calanus
Choquet, Marvin Raoul Charles Roger Ren; Haltebakk, Maja; Dhanasiri, Anusha Krishanthi Shyama; Kosobokova, Ksenia N.; Smolina, Irina Vladimirovna; Søreide, Janne; Svensen, Camilla; Melle, Webjørn Raunsgård; Kwasniewski, Slawomir; Eiane, Ketil; Daase, Malin; Tverberg, Vigdis; Skreslet, Stig; Bucklin, Ann; Hoarau, Galice Guillaume (Peer reviewed; Journal article, 2017)Planktonic copepods of the genus Calanus play a central role in North Atlantic/Arctic marine food webs. Here, using molecular markers, we redrew the distributional ranges of Calanus species inhabiting the North Atlantic ... -
Genetics redraws pelagic biogeography of Calanus
Choquet, Marvin Raoul Charles Roger Ren; Hatlebakk, Maja Karoline Viddal; Dhanasiri, Anusha Krishanthi Shyama; Kosobokova, Ksenia; Smolina, Irina Vladimirovna; Søreide, Janne; Svensen, Camilla; Melle, Webjørn Raunsgård; Kwasniewski, Slawomir; Eiane, Ketil; Daase, Malin; Tverberg, Vigdis; Skreslet, Stig; Bucklin, Ann; Hoarau, Galice Guillaume (Peer reviewed; Journal article, 2017) -
Growth and natural mortality of Maurolicus muelleri and Benthosema glaciale in the Northeast Atlantic Ocean
Vastenhoud, Berthe M. J.; Mildenberger, Tobias K.; Kokkalis, Alexandros; Paoletti, Silvia; Alvarez, Paula; Garcia, Dorleta; Wieczorek, Alina M.; Klevjer, Thor A.; Melle, Webjørn Raunsgård; Jonsson, Sigurður T.; Nielsen, J. Rasmus (Peer reviewed; Journal article, 2023)Mesopelagic fish are considered a possible future fisheries resource, but the biological sustainability of their potential exploitation has not yet been assessed. Sustainability should be evaluated at the population level, ... -
Impacts of a Changing Ecosystem on the Feeding and Feeding Conditions for Atlantic Salmon During the First Months at Sea
Utne, Kjell Rong; Skagseth, Øystein; Wennevik, Vidar; Broms, Cecilie; Melle, Webjørn Raunsgård; Thorstad, Eva Bonsak (Peer reviewed; Journal article, 2022)During the last decades, many wild Atlantic salmon populations have declined dramatically. One hypothesis for an observed reduction in salmon marine growth and survival is reduced abundance of prey. However, the effect of ...