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.
| Main Authors: | , |
|---|---|
| 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 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|