Mustafa Garip

The effects of incubation temperature on the sex of Japanese quail chicks

The effects of incubation temperature on the sex of Japanese quail chicks were investigated in this study. The study was conducted on Japanese quail. In all, 4500 eggs obtained from 2 generations were used. At the beginning of the study, a new flock was formed from available hatching eggs. Hatching eggs were gathered at 3 different ages (8 to 10 weeks, 16 to 18 weeks and 22 to 24 weeks of age) from the laying period in this flock. These eggs were exposed to 5 different incubation temperatures (36.7, 37.2, 37.7, 38.2, and 38.7°C). The hatching results were evaluated for each group. Chicks obtained from these temperature groups were reared separately to obtain quail for breeding. Eggs for incubation were gathered from these breeding quail when they were between 15 and 18 weeks of age. These eggs were placed in an incubator at a standard (37.7°C) temperature, separated by F(1)-generation temperature groups. The chicks in all groups were reared separately, and the sex of the chicks was determined at maturity. Statistical differences (P < 0.05) were found for the sex of the chicks in the third group (22 to 24 weeks) of the F(1) generation, compared with other groups. This result confirmed the hypothesis that different incubation temperatures for the first generation (at the embryo stage) might influence the sex of the next generation of chicks. Further studies are needed to investigate the effects of incubation temperature on chicks from different perspectives.

Effect of egg weight on chick weight, egg weight loss and hatchability in rock partridges (A. graeca)

Abstract This study was conducted to determine the effect of egg weight on chick weight, egg weight loss and hatchability in partridges. Eggs (847) obtained from rock partridges (44-46 weeks ages) were classified according to their weights as <18 g, 18.00-18.99 g, 19.00-19.99 g, 20.00-20.99 g, 21.00-21.99 g, 22.00-22.99 g and ≥23 g and incubated. A positive, powerful and important correlation (0.46 and 0.82 values) between egg weight and egg weight loss and chick weight in different groups was determined (P<0.001) in the study. The differences between hatchability and fertility in the egg groups were significant (P<0.05), but no differences were detected between hatchability of fertile eggs and embryonic mortalities. In conclusion, smaller and bigger eggs of partridges had low fertility while hatchability was disproportionately reduced in eggs that had lost less mass during incubation.

Kekliklerde (A. graeca) Yumurtlama Zamanının Kuluçka Sonuçları ile Bazı Yumurta Özelliklerine Etkisi

Bu calismada, keklik yumurtalarinda, yumurta kalitesi ve kulucka sonuclari uzerine yumurtlama zamaninin etkisi incelenmistir. Arastirmada, 89 haftalik yasta 64 adet disi ve 32 adet erkek Kaya kekligi (A. graeca) kullanilmistir. Keklik yumurtalari sabah (12.00) ve ogleden sonra (16.00) olmak uzere gunde iki kez toplanip kaydedilmistir. Bu calismada genel yumurta verimi % 48.30’dir. Elde edilen bu yumurtalarin % 27.37 sabah grubundan, % 20.94 ise ogle grubundan toplanmistir. Yumurtalarin geneli ele alindiginda % 56.89 sabah, % 43.11 ise ogle grubunda elde edilmis, iki grup arasindaki farklilik istatistiki olarak onemli bulunmustur (P