期刊
JOURNAL OF FISH BIOLOGY
卷 75, 期 7, 页码 1626-1638出版社
WILEY-BLACKWELL
DOI: 10.1111/j.1095-8649.2009.02388.x
关键词
chloride; critical swimming speed; maximum swimming speed; sodium
资金
- British Columbia Pacific Salmon Forum grant
- Natural Sciences and Engineering Research Council (NSERC) of Canada
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.
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