Morphometric characterisation of wing feathers of the barn owl Tyto alba pratincola and the pigeon Columba livia

Table 4 Parameters of pennula (hook radiates)

Tyto alba	p10		s8		gpc1
	outer vane	inner vane	outer vane	inner vane	outer vane	inner vane
density of pennula/mm² ^a	73.5	99.8	82.3	100.2	79.1	91.5
mean length of pennula [μm] ^b	601 +/- 57.5	1271 +/- 87.1	785 +/- 43.3	1017 +/- 55.8	799 +/- 67.3	1014 +/- 63.4
Columba livia	p10		s8		gpc1
	outer vane	inner vane	outer vane	inner vane	outer vane	inner vane
density of pennula/mm² ^a	84.8	152.5	114.1	109.5	154.5	135.1
mean length of pennula [μm] ^b	79 +/- 6.6	136 +/- 15.0	171 +/- 7.8	181 +/- 10.7	158 +/- 14.1	201 +/- 22.3

^a mean values, n_b (p10: N = 50, s8, gpc1: N = 20) multiplied with n_hr (p10 ov: N = 48; all other N = 64)
^b mean values with standard error of the mean, N = 16

ISSN: 1742-9994