Vis enkel innførsel

dc.contributor.authorSambraus, Florian
dc.contributor.authorRemen, Mette
dc.contributor.authorOlsen, Rolf Erik
dc.contributor.authorHansen, Tom Johnny
dc.contributor.authorWaagbø, Rune
dc.contributor.authorTorgersen, Thomas
dc.contributor.authorLock, Erik-Jan
dc.contributor.authorImsland, Albert
dc.contributor.authorFraser, Thomas W.K.
dc.contributor.authorFjelldal, Per Gunnar
dc.description.abstractIn salmon farming, the use of sterile triploids (3N) can mitigate the problem of escapees interbreeding with wild salmon. However, triploid salmon appear less tolerant to high water temperatures and low oxygen levels compared to diploids (2N). To investigate how the thermal performance and physiology of large (2.5 kg) triploid Atlantic salmon Salmo salar L. differs from those of diploids, both ploidies were subjected to water temperatures between 3 and 18°C. The fish were exposed to reduced oxygen saturations (O2 sat, 70%), termed hypoxia, at 6 and 18°C. Triploids fed more than diploids between 3 and 9°C and at similar levels at 12°C. At 15°C, the feed intake significantly dropped in both ploidies, although more in triploids. During hypoxia, feed intake was higher in triploids at 6°C and equal to diploids at 18°C. The overall feed conversion ratio was similar between ploidies. Muscle energy phosphates were generally lower in triploids than diploids, while muscle glucose, blood haemoglobin and haematocrit were lower in triploids than diploids at ≥12°C. Plasma lactate levels tended to be higher in triploids and increased with increasing temperature and at hypoxia in both ploidies. Plasma cortisol increased in both ploidies at high temperatures and was highest in triploids under hypoxic conditions at 18°C. Triploids had a higher cataract score at the start of the experiment and developed more cataracts throughout the experiment. The present findings show that large triploid Atlantic salmon perform better at colder water temperatures compared to diploids and differ in parts of their physiological expression at increasing and high temperature.nb_NO
dc.publisherInter Researchnb_NO
dc.rightsNavngivelse 4.0 Internasjonal*
dc.titleChanges in water temperature and oxygen: the effect of triploidy on performance and metabolism in large farmed Atlantic salmonnb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.source.journalAquaculture Environment Interactionsnb_NO
dc.relation.projectNorges forskningsråd: 216197nb_NO
dc.relation.projectFiskeri- og havbruksnæringens forskningsfond: 900723nb_NO
dc.description.localcode© The authors 2018. Open Access under Creative Commons by Attribution Licence. Use, distribution and reproduction are unrestricted. Authors and original publication must be credited.nb_NO
cristin.unitnameInstitutt for biologi

Tilhørende fil(er)


Denne innførselen finnes i følgende samling(er)

Vis enkel innførsel

Navngivelse 4.0 Internasjonal
Med mindre annet er angitt, så er denne innførselen lisensiert som Navngivelse 4.0 Internasjonal