Browsing by Author "Oguike, M.A."
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Item Relationship between External Morphological Characteristics and Shell Indices of Eggs of Domestic Fowl Kept in Warm Humid Tropics(1994) Oguike, M.A.; Department of Animal Physiology and Health, Federal University of Agriculture, Nigeria.A study on the relationship between external morphological characteristics and shell indices of eggs of domestic chicken was carried out in the Poultry Unit of the Department of Animal Science, University of Nigeria, Nsukka. The eggs used for the investigation were collected from commercial hybrid Lohmann pullets. These birds were kept singly in battery cages and fed layers' ration containing about 17% crude protein and 3.2% calcium. Water was supplied ad /ibill4m. The mean egg width, length, surface area and shape index were 4.35 cm, 5.78 cm, 74, 01 cm2 and 75.32 respectively. The mean shell weight, volume, shell specific gravity, shell membrane weight and shell thickness were 5.20 g, 6.27 cm' 0.94 g em" and 0.21 g and 0.33 mm respectively. Egg shape index was positively correlated with shell thickness while shell thickness and egg surface area showed a negative correlation (PSO.OS). Shell membrane weight was not correlated with shape index but was positively correlated with egg surface area (PSO.OS). Thus, egg surface area increases with shell membrane weight. There was no significant correlation between shell specific gravity and egg featuresItem Seasonal Variation in the Physical Characteristics of Egg Shell of Domestic Chicken Kept in Warm Humid Tropics(1994) Oguike, M.A.; Department of Animal Physiology and Health, Federal University of Agriculture, Umudike, NigeriaInvestigations on seasonal variations on physical characteristics 0 f egg shell 0 f domestic chicken were singly in battery cages and were given water and layer's mash containing about 17% C.P. ad libitum. The eggs were measured for shell weight, shell specific gravity, shell membrane weight and shell thickness. Shell weight was 5.30, 5.23, 5:47 and 4.82 g for late dry, early rainy, late rainy and ~rly dry seasons respectively. Shell membrane weight was 0.19,0.20,0.22 and 0.12 g for the respective seasons. The shell specific gravity was 0.92, 1.06, 0.91 and 0.88 g cm" for late dry, early rainy, late rainy and early dry seasons respectively. Shell thickness was 0.35, 0.34, 0.33 and 0.30 mm respectively for the four seasons. Significant (P
