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International Journal of Poultry Science

.: Home > International Journal of Poultry Science > 2007 > Volume 6 Number 3 > O.T.F. Abanikannda and A.O. Leigh

Allometric Relationships Between Composition and Size of Chicken Table Eggs

O.T.F. Abanikannda and A.O. Leigh
Department of Zoology, Lagos State University, Nigeria
Abstract :

This study investigates intraspecific variation in egg sizes and its component measures and it also  estimated the allometric relationships between egg components (albumen, yolk and shell) and egg
weight in domestic chicken. A total of 299 eggs from Harco Black strain of commercial layers of five distinct
age groups were evaluated for egg weight (g), egg length (mm), egg width (mm), albumen weight (g), yolk
weight (g) and shell weight (g). The overall mean values obtained for the six variables are respectively
55.64±0.28, 56.09±0.15, 42.40±0.08, 33.91±0.21, 15.65±0.12 and 6.46±0.04. There was direct (positive)
association amongst the six variables studied, albeit at varying degrees and the correlation coefficient
ranged from 0.21 to 0.82. The overall mean egg compositions are 60.53%, 27.94% and 11.53%  respectively for albumen, yolk and shell. Only age group and egg weight exerted significant (p<0.001) influence on egg components, the other two factors investigated (egg length and egg width) were not significant (p>0.05) on egg components. The proportion of total variance due to age group was 30.82%, 12.82% and 15.02% for yolk weight, albumen weight and shell weight, while egg weight accounted for 14.46%, 56.09% and 29.77% respectively. There was positive allometry (b = 1.009) for albumen weight for most of the age groups and negative allometry for yolk (b = 0.907) and shell weight (b = 0.742). Albumen weight is more of a function of hen’s age.

Keywords :
Egg components, egg size, allometry

Date Deposited : 14 Jul 2011 12:30

Last Modified : 14 Jul 2011 12:30

Official URL: http://www.pjbs.org/ijps/ijps.htm

Volume 6, Number 3, - 2007 , ISSN 1682-8356

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