The impact of eggshell colour and spot area in Japanese quails: II. Slaughter and carcass characteristic

Abstract

-This study was carried out to investigate the effects of eggshell colour and spot properties (colour and size of the spot area) on growth performance and carcass traits of Japanese quail (Coturnix coturnix japonica) eggs. Study material were allocated to five groups according to their eggshell and spot colours: black spots on greyish white coloured eggshell (I), blue spots on greyish white coloured eggshell (II), diffuse brown spots on greyish brown coloured eggshell (III), brown spots on light green colored eggshell (IV), and small brown spots on greyish brown coloured eggshell (V). The size of the spotted area was determined in each egg group using digital image analysis. The groups did not differ for body weight and length of the shank at the end of the growth period. However, the groups differed significantly for carcass yield after slaughter (not eviscerated) and carcass yield. These parameters were highest in Group I (82.08 and 76.09%) and lowest in Group III (80.20 and 73.86%). Digital image analysis demonstrated that heart length, cardiac fat area, gizzard width, and intestine length varied between the groups. Cardiac fat area was largest in Group III (0.86 cm 2 ) and smallest in Group V (0.65 cm 2 ). Gizzard width was greatest in Group I (2.63 cm) and smallest in Group V (2.47 cm). Intestine length was greatest in Group V (78.45 cm) and smallest in Group IV (72.39 cm). Body weight, shank length, and slaughter and carcass weight do not vary in relation to eggshell colour or the size of the spotted area. The lengths of intestine and heart, gizzard width, and cardiac fat area do vary in relation to eggshell colour or the size of the spotted area.

The Effects of Using Garlic Extract for Quail Hatching Egg Disinfection on Hatching Results and Performance

“…In the study of Kahksar et al (2012) on the effects of essential thyme oil dietary supplementation on the performance and blood parameters of Japanese quails, obtained 159g body weight in the control group and 169 g the bird fed thyme essential oil. Alasahan et al (2016) found an average body weight in 5-week-old quails of 215.77 g, whereas Bonos et al (2010) reported 172-180.8 g. The body weight values reported in those studies for 5-and 6-week-old quails are lower than those obtained in the present study when quails were still 4 weeks old. In addition, 5-week body weight values were found to be considerably higher than those obtained in the aforementioned studies.…”

Relationship between plumage color and eggshell patterns with egg production and egg quality traits of Japanese quails

“…The previous studies [26,27] have also confirmed that eggshell color is a genetic transformation of pigments on the egg surface in the uterus. In addition, Alasahan et al [28] classified the color of eggshells into five different groups, including black-spotted gray-white, green-spotted gray-white, scattered brown-spotted gray-brown, brown-spotted light-green, and small brown-spotted gray-brown. However, they also indicated that the effect of eggshell color on egg weight, eggshell mass, albumen weight, and yolk weight was not statistically significant.…”

Japon Bıldırcınlarında Yumurtlama Döneminde Yeme Rezene (Foeniculum Vulgare Mill.) İlavesinin Yumurta Verimi, Kesim ve Karkas Özellikleri, Bağırsaklarda Parazit Oluşumu ve Spermatolojik Kalite Üzerine Etkisi

“…According to the study, the female quails had higher body weight than male quails, and the best body weight gain was in the GF2 and GF4 groups in females and the GF4 group in male quails compared to the control group. The fact that female quails have better growth rates than male quails is a predominant factor in breeding female-male quails together in meat production (16)(17)(18)(19). In addition, Sarica et al (20) reported that the live weight of male quails that were left out of breeding increased until the eighth week and then decreased, but it was not considered a significant change.…”