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Swimming performance, oxygen consumption and excess post‐exercise oxygen consumption in adult transgenic and ocean‐ranched coho salmon
Author(s) -
Lee C. G.,
Devlin R. H.,
Farrell A. P.
Publication year - 2003
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1046/j.1095-8649.2003.00057.x
Subject(s) - oncorhynchus , biology , oxygen , zoology , vo2 max , transgene , fish <actinopterygii> , fishery , endocrinology , medicine , heart rate , chemistry , blood pressure , biochemistry , gene , organic chemistry
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.