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Effects of lower jaw deformity on swimming performance and recovery from exhaustive exercise in triploid and diploid Atlantic salmon
journal contribution
posted on 2023-05-17, 01:48 authored by Lijalad, M, Powell, MDa b s t r a c t Article history: Received 16 May 2008 Received in revised form 19 January 2009 Accepted 22 January 2009 Keywords: Lower jaw deformity Atlantic salmon Ploidy Swim performance Metabolic rate Lower jaw deformity is a common deformity in cultured triploid Atlantic salmon in Tasmania. However, the physiological effects of this deformity have not been studied. Swimming performance and anaerobic capacity were assessed in sibling diploid, triploid and triploid with lower jaw deformity all female Atlantic salmon. There were no significant differences in the critical swimming speed attained by any of the groups of salmon. However, a second swim challenge after a recovery period of 45 min revealed that triploid salmon with lower jaw deformity were not capable of attaining the same critical swimming speed as in their first test. There was a positive correlation between the severity of the lower jaw deformity and the extent to which recovery between swimming bouts was compromised. Oxygen consumption rates (both routine and maximal) as determined after a bout of exhaustive exercise were identical between all groups of salmon but triploid and triploid with lower jaw deformity fish had a lower excess post-exercise oxygen consumption and recovered their oxygen consumption to pre-exercise levels quicker than diploid fish. This suggests that the aerobic capacity of the fish was not necessarily adversely affected by ploidy or LJD but that but that recovery from exhaustion was affected by jaw deformity. In exhausted fish, triploids and in particular those with skeletal deformity, recovery of EPOC was quicker than with diploids potentially as a result of either not accruing the same oxygen debt or else having the ability to repay the oxygen debt more quickly. © 2009 Elsevier B.V. All rights reserved
History
Publication title
Aquaculture: An International Journal Devoted to Fundamental Aquatic Food ResourcesVolume
290Pagination
145-154ISSN
0044-8486Department/School
Institute for Marine and Antarctic StudiesPublisher
Elsevier Science BvPlace of publication
Po Box 211, Amsterdam, Netherlands, 1000 AeRepository Status
- Restricted