Effects of thermal manipulations during early and late embryogenesis on growth characteristics in Japanese quails (Coturnix cot. japonica)


ALKAN S., NARİNÇ D., KARSLI T., KARABAĞ K., BALCIOĞLU M. S.

ARCHIV FUR GEFLUGELKUNDE, vol.76, no.3, pp.184-190, 2012 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 76 Issue: 3
  • Publication Date: 2012
  • Journal Name: ARCHIV FUR GEFLUGELKUNDE
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.184-190
  • Keywords: Japanese quail, thermal manipulation, growth curve, MALE BROILER-CHICKENS, 4-WEEK BODY-WEIGHT, CURVE PARAMETERS, DIVERGENT SELECTION, GENETIC-PARAMETERS, PROFILE ANALYSIS, MODELS, LINES, THERMOREGULATION, INCUBATION
  • Akdeniz University Affiliated: Yes

Abstract

The objective of the present study was to investigate the effect of thermal manipulations during early and late embryogenesis on growth characteristics of Japanese quail (Coturnix coturnix japonica). Incubation conditions from day 0 to day 17 have been 37.7 degrees C and 55% relative humidity for control group. In the thermally treated eggs during early embryogenesis (EE6, EE7 and EE8 days), incubation temperature was increased to 41 degrees C and relative humidity to 65% for 3 hours (12:00-15:00). In the same way, in the late embryogenesis stage (LE12, LE13 and LE14 days), incubation temperature was increased to 41 degrees C and relative humidity to 65% for 3 hours (12:00-15:00). In total, 600 eggs were divided into three groups in this study. Immediately after the thermal treatments were terminated, incubation conditions were restored to the regular levels (37.7 degrees C and 55% relative humidity). At the 15th day of incubation, the eggs were transferred to hatching trays. The technique of profile analysis was utilized to determine the time-dependent differences in the values of body weight (weekly) in quails. The method concerned is a special version of the multivariate analysis of variance (MANOVA). With the analyses made using the Gompertz model, it was determined that the thermal manipulation treatment created a difference in the growth curves of the Japanese quails. It was found that thermal manipulation in the early period caused a lower mature weight and led to an increase in the rate of maturation.