Polymeropoulos, ET and Elliott, NG and Frappell, PB, Acute but not chronic hyperoxia increases metabolic rate without altering the cardiorespiratory response in Atlantic salmon alevins, Aquaculture, 502 pp. 189-195. ISSN 0044-8486 (2019) [Refereed Article]
Copright 2018 Elsevier B.V.
Hyperoxia (15–18 days at 28 kPa) reared alevins display advanced development compared with normoxia incubated animals. While acute hypoxia generally leads to metabolic depression (≈70%, 21 kPa compared with 5 kPa), acute hyperoxia (28 kPa) causes hypermetabolism (≈30% compared with normoxia at 4 °C and ≈20% at 8 °C). Chronic hyperoxic rearing on the other hand did not alter metabolic rate at 4 °C or 8 °C in acute hyperoxia, normoxia or hypoxia. Heart rates and ventilation rates were also unaltered with acute hyperoxia and were unaffected by chronic hyperoxia exposure. It is shown that acute hyperoxia increases O2) uptake above normoxic conditions but chronic hyperoxia does not result in long term physiological changes. This adds further proof that O2) uptake is not limited by O2) transport capacity but by O2) availability at this developmental stage in salmonids.
|Item Type:||Refereed Article|
|Keywords:||salmon aquaculture, Atlantic salmon, hyperoxia, temperature, acclimation, cardiorespiratory function|
|Research Division:||Biological Sciences|
|Research Field:||Comparative Physiology|
|Objective Division:||Animal Production and Animal Primary Products|
|Objective Group:||Fisheries - Aquaculture|
|Objective Field:||Aquaculture Fin Fish (excl. Tuna)|
|UTAS Author:||Polymeropoulos, ET (Dr Elias Polymeropoulos)|
|UTAS Author:||Elliott, NG (Dr Nick Elliott)|
|UTAS Author:||Frappell, PB (Professor Peter Frappell)|
|Deposited By:||Sustainable Marine Research Collaboration|
Repository Staff Only: item control page