Evaluation of external and internal traits of eggs from three poultry species at different storage durations in tropical environment

Abstract

This study evaluated the external and internal traits of eggs from three indigenous
poultry species (domestic chicken, duck and guinea fowl) at different storage
durations. A total of 147 freshly laid eggs of domestic chicken, duck and guinea fowl
were collected from reputable poultry farms. Seven fresh egg samples for each
species were measured within 2 hours at day 0 of being laid. Each egg was weighed
and broken, and the height of the albumen and egg yolk was measured. Forty-two
eggs of each species were thereafter stored for 5, 10, 15, 20, 25 and 30 days at room
condition (Average temp 26.6°C and Relative humidity 88%). Data obtained were
arranged in a 3 × 7 factorial experimental layout in a completely randomized design.
All external and internal parameters measured were significantly (p<0.05)
influenced except egg width and egg shape index. Guinea fowl eggs had the highest
Haugh unit compared to other species of birds investigated. The Haugh unit of duck
egg was adversely affected (p<0.05) by prolonged storage durations. Guinea fowl
eggs had the least (p<0.05) egg weight loss and shell surface area while duck egg
weight loss was highest. This study concluded that domestic chicken, duck and
guinea fowl eggs can be stored at room temperature and relative humidity of about
0
26.6 C and 88% for a maximum duration of about 20 days