Lateral Line Research: the Importance of Using Natural Stimuli
161
~JE:
I)
Experimental tank
- - track of the submarine
............. lane of the seal
6 s
Os
3m
~~ ~~~- ~--~ ---~---~ --~ ---~- .. ~ .. ~ ... ~ ... ~ . .r----~=w~
/ 16 s
submarine
blindfolded
seal
Fig. 6. Experimental design for the study of hydrodynamic trail following in Harbor seals.
The order of numbers along the trail of the submarine and the lane of the seal reflect the
course of a trial. The inset shows the miniature submarine driven by one main propeller.
The experimental pool was filled with natural seawater that did not allow remote control of
the submarine. For this reason two small additional propellers served to change the course