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Fig. 1. Experimental technique for drag measurement in dead specimens. (A) Side
view and (below) plan view of water-bath mounted on turntable and containing
insect holder attached to force transducer. For ease of presentation, the
insect holder has been enlarged: the length of the horizontal `hook' was 3.5
mm, and the diameter of the vessel was 12 cm. Arrows in plan view indicate
water flow. (B) Enlarged view of insect holder. (C) Experimental findings; see
text for further details. (D) Original recordings of drag measurement. The
first arrow on the left indicates the point at which the turntable was
activated at the slower speed. Within approximately 1 min, a stable flow
regime was established. At the point shown by the second arrow, the turntable
was switched to the higher speed. The third arrow marks the point at which the
turntable was switched off and flow steadily declined to zero. After a delay
of 1 min, the series was repeated to give a duplicate set of recordings for
this individual.
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