Average number of lamellae (±1 standard deviation) per position ( = 1 centimeter) by group and sex in mallards.

Position 1 is in the most proximate part of the maxilla. In position 2, historical males were statistically different from farmed ones, and nearly so (p = 0.051) also from present-day wild males. See Table 2 for sample sizes. Different letters indicate significant difference of means within each group and sex.Average number of lamellae (±1 standard deviation) per position ( = 1 centimeter) by group and sex in mallards.