Incubatory potential of different types of eggs from White Legornh light breeders classified as defective by their shape and / or weight
Abstract
The productive potential of defective eggs for the incubation of light breeders by their weight and / or shape was evaluated. A 3 x 2 factorial design was used, in which the factors were: Weight: from 45 g to 51.5 g (small) of 52 to 65 g (normal) and 65 g to 80 g. (large) and Shape: from 66.5 to 75.4% (ovoids) and from 75.5 to 85.5% (rounded). A when performing the KMO test on the arcosenos, correlations were found between the variables, so it was necessary to use multivariate techniques specifically main components. The experimental unit was each tray in each type of egg; In 4 incubations and the Variable responses: indicators of the biological controls, Final results of the incubation, the results were analyzed using the SPSS program (version 11.0 of 2001). Among the main results we can point out that no significant differences were found for the interactions of the shapes and weights, so they were treated as independent factors. Regarding the forms, only significant differences were found for the Efficiency component for total embryonic mortality adjusted with means of 36.14 and 49.22 for the ovoid and non-ovoid forms studied respectively, being the most efficient rounded form. In the same way there were only differences in this component with means for the small, normal and large ones of 50.44; 49.98 and 27.63 respectively, indicating that large eggs are the least efficient in the first days of incubation. In relation to the second matrix, all the components were not significant and, as in the first, the independent variables had the same result. Therefore, it is concluded that: It was demonstrated that the eggs of White Leghorn breeders classified as unfit (except for large ovoids or not) are likely to be used in artificial incubation and that animals that could produce with similar efficiency are obtained from them to those from normal ovoid eggs, so they may be a possibility for egg production. The forms studied did not show significant differences, so they can be used to obtain eggs for incubation.
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