THE MYOTOMAL MUSCLE OF LABRIFORM SWIMMING FISH IS NOT DESIGNED FOR HIGH SPEED SUSTAINED SWIMMING

W Davison, Edward Field Station, Kaikoura
unpublished
Davison, W. (1988). The myotomal muscle of labriform swimming fish is not designed for high speed sustained swimming. New Zealand Natural Sciences 15: 37-42. Two species of labriform swimming fish, Pseudolabrus celidotus and P. fucicola were exercised in a swimming tunnel. Both species had similar modes of swimming, with the pectoral fins being used for propulsion at all speeds up to the maximum sustainable. Myotomal muscle was only used at the fastest speeds and this led to rapid fatigue.
more » ... rapid fatigue. Small amounts of lactate built up in the pectoral fin muscles but not in the myotome. This lack of anaerobic capacity is discussed in relation to the swimming characteristics and way of life of the fish.
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