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Fig. 2. Variation of the silking force (A), fibre diameter (B) and silking stress
(C) during the silking process at 1 mm s-1 of an anaesthetized
spider. The shaded zone spans the period during which the spider was exposed
to the CO2 flow. The three regions I, II and III, referred to in
the text are indicated. The samples whose tensile properties were measured are
numbered from 1 to 8 and their positions along the silking process are
indicated at the bottom of each panel. FM(I), maximum
force in region I; Fm(I), minimum force in region I;
FM(II), maximum force in region II;
Fm(III), minimum force in region III.