Size and shape of cock hackles derived from three varieties of Spanish chickens related to dry-fly construction

Length, width and widthlength ratio of feathers were measured in two bands of the necks of 109 cocks to estimate repeatabilities and correlations between traits. Three Spanish varieties were studied. 2. The normality of the distributions was adequate based on the Shapiro-Wilk W-test. The variances of the lengthwidth ratios were not homogeneous but the inverse ratio (widthlength) was acceptable. 3. For the widthlength mean ratio of the two bands, the order of merit for the varieties was Cistierna>Riaño>Plateada Vasca. 4. The repeatability estimates ranged from 0.43 to 0.54, which indicated a moderate degree of variance among animals and between bands of feathers relative to the variation within animals. 5. Correlation coefficients showed a positive relationship between length and width (r=0.45 to 0.72), a negative correlation between length and widthlength ratio (r= -0.48 to -0.65) and no association between width and widthlength ratio. © 1986, Taylor & Francis Group, LLC. All rights reserved.

Bibliographic Details

Main Authors:	Escudero, J., Martin, T. G.
Format:	artículo biblioteca
Language:	English
Published:	Taylor & Francis 1986
Online Access:	http://hdl.handle.net/20.500.12792/1221 http://hdl.handle.net/10261/290195
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