Influence of Egg Orientation during Storage and Storage Period on Hatchability of Tswana Chicken Eggs
Journal Title: Journal of Animal Production Advances - Year 2015, Vol 5, Issue 3
Abstract
Egg storage period and egg orientation during storage are known to influence the hatchability of poultry eggs. The influences of egg storage period and egg orientation during storage on hatchability of Tswana chicken eggs have never been evaluated. This study was conducted to investigate the effect of egg storage period and egg orientation during storage on hatchability of Tswana chicken eggs. A total of 540 eggs were divided into 3 equal groups resulting in 180eggs per replicate. Within each replicate, 60 eggs were stored small end up (SEU), another 60 eggs broad end up (BEU) and the last 60 eggs in their horizontal axis or natural position (NP).Within each storage position, 20 eggs were stored for 11-15 d, 20 eggs for 6-10 d and the last 20 eggs for 1-5 days prior to artificial incubation. After artificial incubation for 21d, all unhatched eggs were opened to determine fertility. Egg storage period and orientation position pre-incubation had an influence on the hatchability of Tswana chicken eggs. Egg orientation position during short term storage (≤5d) had no effect on hatchability of both fertile and set eggs. For extended egg storage (6 to 15 d), storing the eggs in the natural position resulted in higher hatchability of both fertile and set eggs compared to Small end up and Broad end up storage positions.
Authors and Affiliations
P. M. Kgwatalala , O. Phetogo , C. Damba , S. J. Nsoso
Keywords
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