Blar i SINTEF Open på forfatter "Volent, Zsolt"
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Acoustic environment of aquaculture net-pens varies with feeding status of Atlantic salmon (Salmo salar)
Rosten, Carolyn; Mathiassen, John Reidar Bartle; Volent, Zsolt (Peer reviewed; Journal article, 2022)Continuous data on the condition of fish is necessary to monitor, control and document biological processes in fish farms in real-time, yet acquiring it from a large net-pen environment is challenging. Tools to rapidly ... -
Characteristic current flow through a stocked conical sea-cage with permeable lice shielding skirt
Jonsdottir, Kristbjørg Edda; Pascal, Klebert; Volent, Zsolt; Alfredsen, Jo Arve (Peer reviewed; Journal article, 2021)The characteristic current flow field around a 55 m deep full-scale stocked conical Atlantic salmon sea-cage equipped with a 10 m permeable skirt was studied experimentally using acoustic Doppler velocimeters and profilers. ... -
Current induced drag forces on cultivated sugar kelp
Endresen, Per Christian; Norvik, Carina; Kristiansen, David; Birkevold, Jens; Volent, Zsolt (Chapter, 2019-06)To obtain more knowledge of current induced drag forces on sugar kelp, towing tests with ropes containing cultivated sugar kelp was conducted. As freshwater may damage the kelp and cause changes in its mechanical response, ... -
Deformasjon av not og Permaskjørt og krefter på fortøyning
Lien, Andreas Myskja; Volent, Zsolt (SINTEF Fiskeri og havbruk rapporter;A23184, Research report, 2012-06-28)Deformasjon av not og permaskjørt og krefter på fortøyning For å studere hvordan et skjørt vil kunne påvirke krefter på fortøyning, notdeformasjon og vannstrømninger inn i og rundt merden, ble det gjennomført modellforsøk ... -
Experimental study of current forces and deformations on a half ellipsoidal closed flexible fish cage
Strand, Ida Marlen; Sørensen, Asgeir Johan; Volent, Zsolt; Lader, Pål (Journal article; Peer reviewed, 2016-08)Closed flexible fish cages are proposed as a new concept in marine aquaculture, replacing the conventional net cages in order to meet ecological challenges related to fish lice and escapes. It is important to understand ... -
Experimental study of installation procedure and volume estimation of tarpaulin for chemical treatment of fish in floating cages
Volent, Zsolt; Birkevold, Jens; Stahl, Annette; Lien, Andreas Myskja; Sunde, Leif Magne; Lader, Pål Furset (Journal article; Peer reviewed, 2017)In the salmon industry chemical delousing is done by enclosing the cage in a tarpaulin, and then mixing the chemical agent in the enclosed water volume. Correct dosage is important to obtain the wanted effect, and in order ... -
Identification of spectral signature for in situ real-time monitoring of smoltification
Svendsen, Eirik; Volent, Zsolt; Schellewald, Christian; Tsarau, Andrei; Bjorgan, Asgeir; Venås, Birger; Bloecher, Nina; Bondø, Morten Steen; Føre, Martin; Jónsdóttir, Kristbjörg Edda; Stefansson, Sigurd Olav (Peer reviewed; Journal article, 2021)We describe the use of an optical hyperspectral sensing technique to identify the smoltification status of Atlantic salmon (Salmo salar) based on spectral signatures, thus potentially providing smolt producers with an ... -
Lice shielding skirts through the decade: Efficiency, environmental interactions, and rearing challenges
Jonsdottir, Kristbjørg Edda; Misund, Andreas Ugelvik; Sunde, Leif Magne; Schrøder, Merete Bjørgan; Volent, Zsolt (Peer reviewed; Journal article, 2023)Lice shielding skirts are a preventative measure against salmon lice in Atlantic salmon farming. The skirt is wrapped around the top meters of the net cage to divert the current flow around the cage, and thereby keep the ... -
Modellforsøk med dukbasert avlusing Beskrivelse av gjennomføringen av modellforsøk i Hirtshals - Foreløpig rapport
Volent, Zsolt; Birkevold, Jens; Stahl, Annette (SINTEF Fiskeri og havbruk;A26406, Research report, 2014-10-23)Det er avgjørende å ha god kontroll på volumet under en avlusing, for å kunne beregne innblanding av lusemidler, slik at en oppnår ønsket behandlingskonsentrasjon. En for høy konsentrasjon kan skade fisken, og for lav ... -
Modellforsøk med dukbasert avlusing. Beskrivelse av gjennomføringen og resultater fra modellforsøk i Hirtshals, juni 2014 for FHF
Volent, Zsolt; Birkevold, Jens; Stahl, Annette; Lien, Andreas Myskja; Sunde, Leif Magne (SINTEF Fiskeri og Havbruk reports;A26728, Research report, 2014-10-23)Målet for prosjektet var å kartlegge og demonstrere i modellskala hvordan de forskjellige dukfasonger oppførte seg ved utsett ved forskjellige strømhastigheter, og om det var mulig å fylle dukene 100 % ved bruk av forskjellige ... -
Modelling the cultivation and bioremediation potential of the kelp Saccharina latissima in close proximity to an exposed salmon farm in Norway
Broch, Ole Jacob; Ellingsen, Ingrid H.; Forbord, Silje; Wang, Xinxin; Volent, Zsolt; Alver, Morten; Handå, Aleksander; Andresen, Kjersti; Slagstad, Dag; Reitan, Kjell Inge; Olsen, Yngvar; Skjermo, Jorunn (Journal article; Peer reviewed, 2013-08-13)A 3-dimensional hydrodynamic-ecological model system (SINMOD) was used to estimate the full-scale cultivation potential of the brown alga Saccharina latissima in integrated multi-trophic aquaculture (IMTA) with Atlantic ... -
Numerical and experimental study on the drainage and collapse of a floating flexible bag structure
Kristiansen, David; Su, Biao; Volent, Zsolt (Journal article; Peer reviewed, 2018-11)This paper addresses the possible drainage and collapse of closed flexible cages in sea-based fish farming. A closed flexible cage is a floating bag structure containing water that is enclosed from the ambient water. ... -
Wave response of closed flexible bags
Lader, Pål; Fredriksson, David W.; Volent, Zsolt; DeCew, Jud; Rosten, Trond Waldemar; Strand, Ida Marlen (Journal article; Peer reviewed, 2017-05)Recent environmental considerations, as salmon lice, escape of farmed fish and release of nutrients, have prompted the aquaculture industry to consider the use of closed fish production systems. The use of such systems is ...