Browsing Brage IMR by Author "Pena, Hector"
Now showing items 1-4 of 4
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A method to automatically detect fish aggregations using horizontally scanning sonar
Vatnehol, Sindre; Pena, Hector; Handegard, Nils Olav (Journal article; Peer reviewed, 2018)Pelagic fishes are a major source of protein and unsaturated fatty acids, and robust management is critical to avoid overfishing. Fisheries management is often supported by indices from scientific acoustic-trawl surveys, ... -
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 ... -
Feasibility study on the use of scientific multibeam sonar to characterize the Atlantic Bluefin Tuna spawning stock
Tenningen, Maria; Pena, Hector; Korneliussen, Rolf; Ona, Egil; Pons, Vicent Puig (Rapport fra havforskningen;2019 - 34, Research report, 2019)The Institute of Marine Research (IMR) and the Polytechnic University of Valencia (UPV) were invited by ICCAT Atlantic-Wide Research Program for Bluefin Tuna (GBYP) to carry out a feasibility study on the use of scientific ... -
Purse Seine Catch Control - Faglig sluttrapport
Pena, Hector; Saltskår, Jostein; Totland, Bjørn; Vold, Aud; Breen, Michael; Ingolfsson, Olafur; Tenningen, Maria; Øvredal, Jan Tore (Rapport fra havforskningen;Nr. 3 - 2018, Research report, 2018)