Blar i Brage IMR på forfatter "Patel, Ruben"
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Detecting Atlantic herring by parametric sonar
Godø, Olav Rune; Foote, Kenneth G.; Dybedal, Johnny; Tenningen, Eirik; Patel, Ruben (Journal article; Peer reviewed, 2010-03-17)The difference-frequency band of the Kongsberg TOPAS PS18 parametric sub-bottom profiling sonar, nominally 1–6 kHz, is being used to observe Atlantic herring. Representative TOPAS echograms of herring layers and schools ... -
First data from sea trials with the new MS70 multibeam sonar
Ona, Egil; Dalen, John; Knudsen, Hans Petter; Patel, Ruben; Andersen, Lars Nonboe; Berg, Sverre (Journal article; Peer reviewed, 2006) -
Fisheries acoustics and Acoustic Target Classification - Report from the COGMAR/CRIMAC workshop on machine learning methods in fisheries acoustics
Handegard, Nils Olav; Andersen, Lars Nonboe; Brautaset, Olav; Choi, Changkyu; Eliassen, Inge Kristian; Heggelund, Yngve; Hestnes, Arne Johan; Malde, Ketil; Osland, Håkon; Ordonez, Alba; Patel, Ruben; Pedersen, Geir; Umar, Ibrahim; Engeland, Tom Van; Vatnehol, Sindre (Rapport fra havforskningen;2021 - 25, Research report, 2021)This report documents a workshop organised by the COGMAR and CRIMAC projects. The objective of the workshop was twofold. The first objective was to give an overview of ongoing work using machine learning for Acoustic Target ... -
Mesoscale Eddies Are Oases for Higher Trophic Marine Life
Godø, Olav Rune; Samuelsen, Annette; Macaulay, Gavin J.; Patel, Ruben; Hjøllo, Solfrid Sætre; Horne, John K.; Kaartvedt, Stein; Johannessen, Johnny A. (Journal article; Peer reviewed, 2012-01-07) -
Observing behaviour of over-wintering Herring (Clupea harrengus L.) in Ofoten with Acoustic Current profiler
Patel, Ruben; Godø, Olav Rune; Lohrmann, Atle (ICES CM Documents;2003/Q:6, Working paper, 2003)In this paper we present results and interpretation of velocity and signal strength data collected with a ‘Continental’ Current Profiler on over-wintering herring in the Ofoten in the North of Norway. The instrument was ... -
Particle aggregation at the edges of anticyclonic eddies and implications for distribution of biomass
Samuelsen, Annette; Hjøllo, Solfrid Sætre; Johannessen, Johnny Andre; Patel, Ruben (Journal article; Peer reviewed, 2012)Acoustic measurements show that the biomass of zooplankton and mesopelagic fish is redistributed by mesoscale variability and that the signal extends over several hundred meters depth. The mechanisms governing this ... -
Probing the deep: Acoustic characterization of the Mid-Atlantic Ridge ecosystem
Horne, John K.; Anderson, Cairistiona I.H.; Godø, Olav Rune; Patel, Ruben (Journal article; Peer reviewed, 2006) -
Quantitative processing of broadband data as implemented in a scientific split-beam echosounder
Andersen, Lars Nonboe; Chu, Dezhang; Handegard, Nils Olav; Heimvoll, Harald; Korneliussen, Rolf; Macaulay, Gavin; Ona, Egil; Patel, Ruben; Pedersen, Geir (Peer reviewed; Journal article, 2023)The use of quantitative broadband echosounders for biological studies and surveys can offer considerable advantages over narrowband echosounders. These include improved spectral-based target identification and significantly ... -
Silent research vessels are not quiet
Ona, Egil; Godø, Olav Rune; Handegard, Nils Olav; Hjellvik, Vidar; Patel, Ruben; Pedersen, Geir (Journal article; Peer reviewed, 2007)Behavior of herring Clupea harengus stimulated by two ocean-going research vessels; respectively designed with and without regard to radiated-noise-standards. Both vessels generate a reaction pattern, but, contrary to ... -
Studying the relationship between spatial fish distributions and trawl catches
Trenkel, Verena M.; Godø, Olav Rune; Handegard, Nils Olav; Patel, Ruben (ICES CM Documents;2004/R:26, Working paper, 2004)We propose an approach for studying the relationship between spatial fish distributions and the distribution of numbers in trawl catches. Individual spatial fish distributions are derived from acoustics data collected with ... -
Tracking individual fish from a moving platform using a split-beam transducer
Handegard, Nils Olav; Patel, Ruben; Hjellvik, Vidar (Journal article; Peer reviewed, 2005)Tracking of individual fish targets using a split-beam echosounder is a common method for investigating fish behavior. When mounted on a floating platform like a ship or a buoy, the transducer movement often complicates ...