A preliminary study was conducted to investigate the contents in yolk and albumen of trace minerals Al, Br, Ca, Cl, K, Mg, Na in eggs from Domestic chicken, Guinea Fowls and Ducks. These courtyard birds were fed on cereals, legumes, grass and swill. Trace element contents in yolks were generally higher than those in albumen except for Br and Cl. The highest content of Ca in yolks was in Guinea fowl. Cl concentration was highest in chicken yolk. The concentration of K was highest in Guinea fowl yolk, and Na contents were highest in duck yolk. Mg was seen only in the chicken eggs with the higher concentration in the yolk than in albumen. The results provide baseline measurements of trace mineral contents of eggs and suggest measurable differences amongst the eggs from chicken ducks and guinea fowls; these differences are discussed in details.
