highly significantp < 0.0001
Fluctuating asymmetry The signed FA variance estimation was highly significant relative to measurement error in both tarsus length ( χ 2 = 789.7, d.f. = 1, p < 0.0001) and rectrix mass ( χ 2 = 449.1, d.f. = 1, p < 0.0001) (electronic supplementary material, table S2).