Devekuşlarında (Struthio camelus) yumurta ağırlığının kuluçka özellikleri üzerine etkisi

Abstract

This research was carried out with the aim of determining the effects of egg weight on the hatching characteristics of ostrich eggs The effect of egg weight (small 1200 1400 g medium 1401 1600 g large >1600 g) on the hatchability of fertile eggs and hatchability of total eggs was found to be significant (P<001) Hatchability of fertile eggs was determined to be 67 74 74 42 and 64 28% and hatchability of total eggs was determined to be 43 75 50 00 and 41 86% for the small medium and large egg weight groups respectively The effects of egg weight on early medium and late embryonic death were also found to be significant (P< 0 01) The early embryonic death rates were determined to be 9 68 9 30 and 10 91 % medium embryonic death rates were determined to be 6 46 4 65 and 7 35% and late embryonic death rates were determined to be 16 12 11 63 17 46% for the small medium and large weight groups respectively The effects of egg weight on egg weight loss were found to be significant (P<0 05) Eggs with medium weight exhibited a weight loss of 13 94% which was close to the optimum The effect of egg weight on chick weight was also found to be significant (P<0 01) The chick weight increased as the egg weight increased The effect of egg weight on hatching time was found to be significant (P<0 05) Incubation time was longer for the large egg weight groups compared with the small or medium weight groups.