Mitchell, C. P. (1989).  Swimming performances of some native freshwater fishes. 
New Zealand Journal of Marine and Freshwater Research.  23:181-187.
	
Observations were made of the response to water velocity for upstream migrating 
juveniles of 5 diadromous native fishes (Anguilla australis, Galaxias maculatus, 
G. fasciatus , Retropinna retropinna, Gobiomorphus cotidianus). Swimming 
performance within a hydraulic flume was measured and observations made of the 
behavioural adaptions of some species to swim through high water velocities. 
Timed swimming at known water velocities allowed estimation of critical 
velocities for fish passage. For juvenile fishes (30-80 mm total length), 
velocities below 0.3 m/s should allow unrestricted passage over obstacles less 
than 15 m in length. Water velocities below 0.25 m/s may be necessary for 
obstacles over 15 m.