Blar i Nofima rapportserie på forfatter "Aas, Turid Synnøve"
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A preliminary test of the possibility for reclamation of phosphorus from aquaculture sludge. A CtrlAQUA pre-project
Aas, Turid Synnøve (Research report, 2016)The concentrations of dissolved phosphates (PO4) and total phosphorus was analysed in sludge samples collected from Nofima’s RAS facilities. The highest concentration of phosphorus was found in sludge from the swirl ... -
Collection of feed spill and faeces from tank outlet. The FOGAS project
Aas, Turid Synnøve; Nerland, Frode; Åsgård, Torbjørn Einar; Meriac, Andre (Nofima rapportserie, Research report, 2023) -
Effects of dietary moisture content of extruded diets on physical feed quality and nutritional response in Atlantic salmon (Salmo salar) - A CREATE project
Oehme, Maike Marlene; Aas, Turid Synnøve; Olsen, Hanne Jorun; Sørensen, Mette; Hillestad, Marie; Li, Yafei; Åsgård, Torbjørn Einar (Nofima rapportserie, Research report, 2012)Feed pellets in modern aquaculture must be of high physical quality to withstand impacts during transport, storage and feeding. However, physical quality of feed has been shown to affect feed intake, nutrient digestibility ... -
Estimated content of nutrients and energy in feed spill and faeces in Norwegian salmon culture
Aas, Turid Synnøve; Åsgård, Torbjørn Einar (Nofima rapportserie, Research report, 2017)The annual production of 1.3 million tons of salmon in Norway consumes 1.5 million tons of feed. Some of the energy and nutrients from feed is not digested by the salmon, and ends up in the faeces. In addition, nutrients ... -
Estimert innhold av næringsstoff og energi i fôrspill og faeces fra norsk lakseoppdrett
Aas, Turid Synnøve; Åsgård, Torbjørn Einar (Nofima rapportserie, Research report, 2017)Det produseres 1,3 millioner tonn laks og omsettes 1,5 millioner tonn fôr årlig i Norge. Noe av energien og næringsstoffene fra fôret er ikke tilgjengelig for laksen, og ender opp i faeces. I tillegg ender energi og ... -
Feed intake and nutrient digestibility and retention in Atlantic salmon fed diets with different physical pellet quality. A CREATE project
Aas, Turid Synnøve; Sixten, Hanne Jorun; Hillestad, Marie; Ytrestøyl, Trine; Sveier, Harald; Åsgård, Torbjørn Einar (Research report, 2015)Three extruded salmon diets (9 mm) were produced with the same formulation but different physical pellet qualities. Pellet quality was measured in terms of bulk density, durability (Ligno and DORIS test), fat leakage, ... -
Feed intake in Atlantic salmon fed with two different spreading patterns of feed
Aas, Turid Synnøve; Ytrestøyl, Trine; Åsgård, Torbjørn Einar; Skøien, Kristoffer Rist; Alver, Morten Omholt; Alfredsen, Jo Arve (Research report, 2015) -
Feed pellet durability in pneumatic conveying systems for fish farming
Sørensen, Mette; He, Gaojie; Oehme, Maike Marlene; Åsgård, Torbjørn Einar; Storebakken, Trond; Aas, Turid Synnøve (Nofima rapportserie, Research report, 2008)This report is based on Gaojie He’s master thesis, which was completed in june 2008 at the Department of Animal and Aquacultural Sciences, Norwegian University of Life Sciences, supervised by Mette Sørensen and Trond ... -
Feed utilisation in Atlantic salmon kept at fluctuating oxygen saturation. A CREATE project
Aas, Turid Synnøve; Remen, Mette; Oppedal, Frode; Hjertnes, Tor Johannes (Nofima rapportserie, Research report, 2011)Atlantic salmon (initial weight 383 g) was kept at either stable oxygen saturation (>80%, control) or exposed to four daily drops in oxygen saturation to 70, 60 or 50% in a 68-days experiment. The fish was fed twice daily ... -
Gastrointestinal passage rate in Atlantic salmon (Salmo salar) fed dry or soaked feed. A CREATE project
Aas, Turid Synnøve; Ytrestøyl, Trine; Hatlen, Bjarne; Sixten, Hanne Jorun; Hillestad, Marie; Åsgård, Torbjørn Einar (Research report, 2013)Atlantic salmon was fed a commercial-like diet either as is (92% dry matter) or soaked for 2 h in sea water prior to feeding (70% dry matter). The salmon showed large individual variation in gastrointestinal passage rate ... -
Gut evacuation rate in Atlantic salmon (Salmo salar) fed diets with different physical properties. A CREATE project
Aas, Turid Synnøve; Ytrestøyl, Trine; Hatlen, Bjarne; Sixten, Hanne Jorun; Hillestad, Marie; Sveier, Harald; Selset, Roger; Åsgård, Torbjørn Einar (Research report, 2014)To measure the effect of physical feed quality on gut evacuation, Atlantic salmon with mean weight 1047 g (measured after finishing the sampling) was fed two extruded feeds with different physical quality to satiation. ... -
Karakterisering av slam fra tre kommersielle settefiskanlegg gjennom ett produksjonsår. Hovednæringsstoff, mineraler og tungmetaller
Ytrestøyl, Trine; Aas, Turid Synnøve; Nerdal, Kristin Skei; Berge, Gerd Marit (Research report, 2016)Dette prosjektet har hatt som hovedmål å karakterisere innhold av næringsstoff (fett, protein, mineraler) og energi i slamprøver tatt månedlig gjennom ett år ved tre settefiskanlegg. Prøver ble tatt av avvannet slam etter ... -
Karakterisering av slam fra tre kommersielle settefiskanlegg gjennom ett produksjonsår. Hovednæringsstoff, mineraler og tungmetaller
Ytrestøyl, Trine; Aas, Turid Synnøve; Nerdal, Kristin Skei; Berge, Gerd Marit (Research report, 2016)Dette prosjektet har hatt som hovedmål å karakterisere innhold av næringsstoff (fett, protein, mineraler) og energi i slamprøver tatt månedlig gjennom ett år ved tre settefiskanlegg. Prøver ble tatt av avvannet slam etter ... -
Kunnskapsgrunnlag – Slam fra lakseoppdrett
Aas, Turid Synnøve (Nofima rapportserie, Research report, 2021)Slam fra lakseoppdrett består av fôrrester og gjødsel (faeces) som fanges opp med filtersystem og eventuelt tørkes før det transporteres bort. Gjødsel går lett i oppløsning og er vanskelig å samle opp, og slam inneholder ... -
Nutritional value of feeds with different physical qualities
Aas, Turid Synnøve; Terjesen, Bendik Fyhn; Sørensen, Mette; Oehme, Maike Marlene; Sigholt, Trygve; Hillestad, Marie; Holm, Jørgen; Åsgård, Torbjørn Einar (Nofima rapportserie, Research report, 2009)In a previously performed study, rainbow trout with mean initial weight 1144 g was fed two experimental feeds with similar chemical composition, but differing in physical properties (high and low water stability, denoted ... -
Resource utilisation and eco-efficiency of Norwegian salmon farming in 2010
Ytrestøyl, Trine; Aas, Turid Synnøve; Berge, Gerd Marit; Hatlen, Bjarne; Sørensen, Mette; Ruyter, Bente; Thomassen, Magny S.; Hognes, Erik Skontorp; Ziegler, Friederike; Sund, Veronica; Åsgård, Torbjørn Einar (Nofima rapportserie, Research report, 2011)This report consists of four parts: Part 1 is an evaluation of some of the methods used for evaluating food productions in a sustainability perspective. Part 2 is a description of some sustainability indicators often used ... -
Resource utilisation of Norwegian salmon farming in 2012
Ytrestøyl, Trine; Aas, Turid Synnøve; Åsgård, Torbjørn Einar (Research report, 2014)This report follows up the work on resource utilisation and eco-efficiency of Norwegian salmon production in 2010 and contains a resource budget for the Norwegian salmon production in 2012 showing the flow of major nutrients ... -
Resource utilization of Norwegian salmon farming in 2016 – Professional final report
Aas, Turid Synnøve; Ytrestøyl, Trine; Åsgård, Torbjørn Einar (Nofima rapportserie, Research report, 2019)This report is an update on the utilization of feed resources in Norwegian salmon farming industry in 2016. In 2016, 1.25 million tonnes of salmon were produced in Norway, using 1.62 million tonnes feed ingredients ‘as is’ ... -
Ressursregnskap og analyse av fôrråvarer 2012. Sluttrapport
Ytrestøyl, Trine; Aas, Turid Synnøve; Hognes, Erik Skontorp; Åsgård, Torbjørn Einar (Research report, 2014)Dette prosjektet er en oppfølging av et prosjekt gjennomført i 2011. Det er i prosjektet gitt en oversikt over hvilke fôrråvarer som er brukt i norsk lakseproduksjon i 2012 og hvor effektivt råvarene utnyttes i produksjonen ... -
Spreading of feed pellets in a sea cage for salmon farming using an automatic rotor spreader feeding system.A CREATE project
Aas, Turid Synnøve; Oehme, Maike Marlene; Sørensen, Mette; Lygren, Ingolf; Åsgård, Torbjørn Einar (Nofima rapportserie, Research report, 2011)Efficient production of fish in large cage units demands a feeding practice which is according to the fish’s behavioral and physiological requirements. It is generally presumed that spreading the feed pellets uniformly ...