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- Title
Swimming performance and associated ionic disturbance of juvenile pink salmon Oncorhynchus gorbuscha determined using different acceleration profiles.
- Authors
Nendick, L.; Grant, A.; Gardner, M.; Sackville, M.; Brauner, C. J.; Farrell, A. P.
- Abstract
Swimming performance was assessed in juvenile pink salmon Oncorhynchus gorbuscha (body mass <5·0 g) using five different protocols: four constant acceleration tests each with a different acceleration profile (rates of 0·005, 0·011, 0·021 and 0·053 cm s−2) and a repeated ramped-critical swimming speed test. Regardless of the swim protocol, the final swimming speeds did not differ significantly ( P > 0·05) among swim tests and ranged from 4·54 to 5·20 body lengths s−1. This result supports the hypothesis that at an early life stage, O. gorbuscha display the same fatigue speeds independent of the swimming test utilized. Whole body and plasma [Na+] and [Cl−] measured at the conclusion of these tests were significantly elevated when compared with control values ( P < 0·05) and appear to be predominantly associated with dehydration rather than net ion gain. Given this finding for a small salmonid, estimates of swim performance can be accurately measured with acceleration tests lasting <10 min, allowing a more rapid processing than is possible with a longer critical swim speed test.
- Subjects
PINK salmon fisheries; PACIFIC salmon fisheries; SWIMMING; HYPOTHESIS; DEHYDRATION
- Publication
Journal of Fish Biology, 2009, Vol 75, Issue 7, p1626
- ISSN
0022-1112
- Publication type
Article
- DOI
10.1111/j.1095-8649.2009.02388.x