Swimming performance, oxygen consumption and excess post-exercise oxygen consumption in adult transgenic and ocean-ranched coho salmon

✍ Scribed by C. G. Lee; R. H. Devlin; A. P. Farrell

• Book ID: 104455581
• Publisher: John Wiley and Sons
• Year: 2003
• Tongue: English
• Weight: 182 KB
• Volume: 62
• Category: Article
• ISSN: 0022-1112
• DOI: 10.1046/j.1095-8649.2003.00057.x

✦ Synopsis

Routine oxygen consumption (__M__o~2~) was 35% higher in 1 day starved and 21% higher in 4 day starved adult transgenic coho salmon Oncorhynchus kisutch relative to end of migration ocean‐ranched coho salmon. Critical swimming speed (U~crit~) and __M__o~2~ at U~crit~ (__M__o~2max~) were significantly lower in 4 day starved transgenic coho salmon (1·25 BL s^−1^; 8·79 mg O~2~ kg^−1^ min^−1^) compared to ocean‐ranched coho salmon (1·60 BL s^−1^; 9·87 mg O~2~ kg^−1^ min^−1^). Transgenic fish swam energetically less efficiently than ocean‐ranched fish, as indicated by a poorer swimming economy at U~crit~ (__M__o~2max~). Although __M__o~2max~ was lower in transgenic coho salmon, the excess post‐exercise oxygen consumption (EPOC) measured during the first 20 min of recovery was significantly larger in transgenic coho salmon (44·1 mg O~2~ kg^−1^) compared with ocean‐ranched coho salmon (34·2 mg O~2~ kg^−1^), which had a faster rate of recovery.