JEB -- Butler and Johnson 207 (2): 285 Figure IG5

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Fig. 5. Power fit of breaking stress ( ${sigma}$ _brk) as a function of breaking strain ( ${epsilon}$ _brk) of the unmelanized (open circles) and melanized (closed circles) barbs. There were no significant differences in slope (ANCOVA; P_2,153=0.42) or intercept (P_2,153=0.74) between barb colors for the log-transformed data (overall equation: ${sigma}$ _brk=1600 ${epsilon}$ _brk^0.62, r²=0.66, P_1,154<0.001 that the overall slope is zero).