Species-level divergences in multiple functional traits between the two endemic subspecies of Blue Chaffinches Fringilla teydea in Canary Islands

Lifjeld, Jan T.; Anmarkrud, Jarl Andreas; Calabuig, Pascual; Cooper, Joseph E. J.; Johannessen, Lars Erik; Johnsen, Arild; Kearns, Anna M.; Lachlan, Robert F.; Laskemoen, Terje; Marthinsen, Gunnhild; Stensrud, Even; Garcia-del-Rey, Eduardo

doi:10.1186/s40850-016-0008-4

Table 6 Plumage colour differences between polatzeki (N = 5) and teydea (N = 10) Blue Chaffinches

From: Species-level divergences in multiple functional traits between the two endemic subspecies of Blue Chaffinches Fringilla teydea in Canary Islands

Plumage patch	Colour variable	teydea	polatzeki	Test of difference between means	Effect size (Cohens d)
Back	Brightness	2.424 ± 0.190	2.082 ± 0.176	t ₁₃ = 3.36, P = 0.005	1.98
	Chroma	0.093 ± 0.010	0.091 ± 0.002	t ₁₃ = 0.45, P = 0.66	0.26
	Hue	−1.045 ± 0.321	−1.103 ± 0.481	t ₁₃ = 0.28, P = 0.78	0.17
	PC1	1.992 ± 3.468	−3.985 ± 3.170	t ₁₃ = 3.23, P = 0.007	1.90
	PC2	−0.169 ± 1.426	0.338 ± 0.221	t ₁₃ = −0.78, P = 0.45	−0.46
Crown	Brightness	2.248 ± 0.159	2.056 ± 0.078	t ₁₃ = 2.50, P = 0.026	1.48
	Chroma	0.085 ± 0.015	0.076 ± 0.002	t ₁₃ = 1.31, P = 0.21	0.77
	Hue	−0.555 ± 0.250	−0.681 ± 0.191	t ₁₃ = 0.98, P = 0.34	0.58
	PC1	1.574 ± 4.249	−3.149 ± 2.088	t ₁₃ = 2.32, P = 0.037	1.36
	PC2	−0.279 ± 1.595	0.559 ± 0.853	t ₁₃ = -1.09, P = 0.30	−0.64
Rump	Brightness	2.358 ± 0.152	2.147 ± 0.112	t ₁₃ = 2.72, P = 0.018	1.61
	Chroma	0.095 ± 0.009	0.102 ± 0.008	t ₁₃ = −1.46, P = 0.17	−0.86
	Hue	−0.949 ± 0.691	−0.674 ± 1.154	t ₁₃ = −0.58, P = 0.57	−0.34
	PC1	1.691 ± 3.993	−3.382 ± 3.043	t ₁₃ = 2.49, P = 0.027	1.46
	PC2	0.420 ± 1.246	−0.839 ± 0.649	t ₁₃ = 2.09, P = 0.056	1.23
Upper breast	Brightness	2.896 ± 0.208	2.816 ± 0.201	t ₁₃ = 0.71, P = 0.49	0.42
	Chroma	0.143 ± 0.018	0.154 ± 0.011	t ₁₃ = −1.22, P = 0.25	−0.73
	Hue	−0.033 ± 1.223	1.136 ± 0.513	t ₁₃ = −2.02, P = 0.064	−1.19
	PC1	0.493 ± 4.429	−0.985 ± 4.149	t ₁₃ = 0.62, P = 0.55	0.37
	PC2	0.365 ± 1.308	−0.730 ± 1.130	t ₁₃ = 1.59, P = 0.14	0.94
Wing bar (median covert)	Brightness	2.962 ± 0.229	3.898 ± 0.334	t ₁₃ = −6.43, P < 0.001	3.78
	Chroma	0.193 ± 0.025	0.309 ± 0.035	t ₁₃ = −7.52, P < 0.001	4.38
	Hue	1.284 ± 0.069	1.268 ± 0.014	t ₁₃ = 0.51, P = 0.62	0.30
	PC1	−2.604 ± 1.995	5.209 ± 2.874	t ₁₃ = −6.20, P < 0.001	−3.65
	PC2	0.170 ± 1.229	−0.340 ± 1.065	t ₁₃ = 0.79, P = 0.45	0.46

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ISSN: 2056-3132

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