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Figure 7


Fig. 7. Breaking force (Fmax) scales with mass, (M), as Fmax=11.2M0.786, r2=0.96, s.e.m. of the slope=0.027 for A. diadematus, and as Fmax=0.363M0.66, r2=0.87, s.e.m. of the slope=0.13 for S. scenicus (solid lines). The pre-web first-instar A. diadematus were excluded as outliers and fall well below the extended best-fit line (dotted line). The static safety factor (SBW) determined from the force-mass scaling relationship, is shown as broken lines, where the black line indicates data for A. diadematus (SBW=1.14M–0.214) and the blue line indicates data for S. scenicus (SBW=0.037M–0.340).





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