Longer flumes increase critical swimming speeds by increasing burst-glide swimming duration in carp Cyprinus carpio, L.

摘要

Carp Cyprinus carpio altered the repertoire of swimming behaviour with increased flume length. While the transition speed from steady to burst-coast swimming was unaffected by flume length, fish reached higher critical swimming speed (U< sub>crit), consequently swimming for longer periods of time in burst-coast mode and hence performing more work before becoming fatigued. Analysis of swimming behaviour of burst-coast swimming revealed an increase in duration and a decrease in distance of forward burst movements with increasing water speeds. Frequency was unaffected by water speed. Overall, longer flumes increased U< sub>crit by allowing for less restricted burst-coast swimming behaviour.