Feeding and nutrition of pre-harvest Atlantic salmon in seawater RAS at four temperatures

• Main Authors: Carter, CG, Hilder, PE, Codabaccus, BM, Grunenwald, M, Adams, LR, Nuez-Ortin, WG
• Format: Conference Object
• Language: English
• Published: . 2016
• Subjects: Agricultural; Veterinary and Food Sciences; Fisheries sciences; Aquaculture; Atlantic salmon
• Online Access: http://ecite.utas.edu.au/110249

As water temperature increased (Phase 1) feed intake was higher at elevated temperatures (>19C) whereas there wereno differences in growth or FCR. ΔCV weight showed the individual growth trajectories were closer at 21C. Pre-selected individuals showed wide variation in performance (Phase 2), individuals with condition factor of >1.2 werecompared at 15 and 21C. After more than 46 days at an elevated temperature (>19C) there were few significantdifferences across growth, condition or muscle lipid. This indicated a level of robustness in a sub-group of salmon. However, the performance of these more robust salmon was declining. Large Tasmanian Atlantic salmon held at elevated temperatures (with 100% DO) in RAS declined in performance butcontinued to feed and grow for at least 7 weeks. Pigmentation appeared the most sensitive parameter measured.