Determining the Effects of Laying Time and Cage Layer Differences on Calculated Egg Parameters of Brown Layer Pure Line

Abstract

In this study, the Brown Layer Pure Line that housing as individual cage system at the Poultry Research Institute in Ankara was used. Eggs obtained from 24, 28, 32, 36 and 40 weeks old eggs were collected 3 times a day in the morning (10:00), noon (12:00) and evening (15:00). Egg Size and Egg Width (YBE), Shape Index and Elongation (SIE), Egg Surface Area and Volume (YAH), Shell Weight and Shell Thickness (CAS), Number of Pores and Pore Density (GSY), Yellow Ratio and Yellow Weight (SOA), Albumen Weight and Albumen Ratio (AO) were examined in 425 eggs obtained from these chickens found in these cages which are three tiers as upper, middle and bottom. The difference in cage layer did not have a significant effect on the calculated properties (P>0.05). On the other hand, the effect of laying time on all traits obtained from these calculations based on egg weight was found to be significant (P<0.01).