Browsing NOFIMA vitenarkiv by Author "Aas, Turid Synnøve"
Now showing items 1-20 of 37
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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 ... -
Chemical composition of whole body and fillet of slaughter sized Atlantic salmon (Salmo salar) and rainbow trout (Oncorhynchus mykiss) farmed in Norway in 2020
Aas, Turid Synnøve; Åsgård, Torbjørn Einar; Ytrestøyl, Trine (Peer reviewed; Journal article, 2022)The fish is the end-product in fish farming, but updated data on the composition of slaughter sized farmed salmon and trout are still scarce. The body composition of farmed salmonids changes over time as farming technology, ... -
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) -
Disintegration stability of extruded fish feed affects gastric functions in Atlantic salmon (Salmo salar)
Bogevik, André Sture; Samuelsen, Tor Andreas; Aspevik, Tone; Romarheim, Odd Helge; Aas, Turid Synnøve; Kalananthan, Tharmini; Rønnestad, Ivar (Peer reviewed; Journal article, 2021)In the present study, two salmon feeds with different disintegration stabilities were produced by impacting extruder viscous heat dissipation with the use of different lipid levels in the feed mix. The feeds were then dried ... -
Effects of dietary moisture content of extruded diets on physical feed quality and nutritional response in Atlantic salmon (Salmo salar)
Oehme, Maike Marlene; Aas, Turid Synnøve; Olsen, Hanne; Sørensen, Mette; Hillestad, Marie; Li, Yafei; Åsgård, Torbjørn Einar (Peer reviewed; Journal article, 2014)Feeds in modern aquaculture must be of high physical quality to withstand mechanical impacts. However, physical quality of feed has been shown to affect nutritional responses. In this study, different physical feed qualities ... -
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 or without surface spreading of feed
Aas, Turid Synnøve; Ytrestøyl, Trine; Åsgård, Torbjørn Einar; Skøien, Kristoffer Rist; Alver, Morten Omholt; Alfredsen, Jo Arve (Journal article, 2020) -
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 intake, nutrient digestibility and nutrient retention in Atlantic salmon (Salmo salar L.) fed diets with different physical pellet quality
Aas, Turid Synnøve; Sixten, Hanne Jorun; Hillestad, Marie; Ytrestøyl, Trine; Sveier, Harald; Åsgård, Torbjørn Einar (Peer reviewed; Journal article, 2020) -
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. ... -
Intrinsic settling rate and spatial diffusion properties of extruded fish feed pellets
Skøien, Kristoffer Rist; Aas, Turid Synnøve; Alver, Morten; Romarheim, Odd Helge; Alfredsen, Jo Arve (Journal article; Peer reviewed, 2016) -
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 ...