the aim of this study was to evaluate the effects of stocking density (0.20 and 0.27 m 2 /lamb) during transportation on certain biochemical stress parameters and meat quality characteristics of fiftyfive Karayaka lambs divided into two groups. The front compartment of the trailer was loaded at high stocking density (hd: 0.20 m 2 /lamb; n=33) and the remainder was loaded at low stocking density (ld: 0.27 m 2 /lamb; n=22). the distance was approximately 130 km and duration was 2 h 15 min. blood samples were taken just before and just after transportation. glucose (p<0.001), lactate (p<0.001), cortisol (p<0.01), creatine kinase (ck) (p<0.01), lactate dehydrogenase (ldh) (P<0.01) and alanine aminotransferase (ALT) (P<0.05) levels were significantly higher in lambs of the hd group than in the ld group. the effects of stocking density on ph, proportion of expressed juice, cooking loss, Warner-Bratzler shear force value and meat colour parameters were not significant (P>0.05). Transportation with a stocking density of 0.20 m 2 /lamb resulted in higher stress responses in lambs compared with a stocking density of 0.27 m 2 /lamb. however, increased stress in the hd group did not lead to any adverse effects on meat quality characteristics. in the determination of stocking density, a compromise that gives animal welfare and commercial objectives equal status would improve the current situation.
KeywordsEmbryonal mortality, hatchability, pheasant, protein levels, sex ratio.Submitted: November/2016 Approved: January/2017
ABSTRACTThis study was performed to investigate the effects of crude protein (CP) in diet and sex ratio on egg production, egg and hatching chick weight and hatchability traits in pheasants (Phasianus Colchicus). In this study, the treatment groups were constructed as 15% CP-5:1; 15% CP-7:1; 18% CP-5:1; 18% CP-7:1 for CP and sex (male:female) ratio respectively. The eggs were obtained from 48 weeks old pheasant. In this study, it was determined that there was positive effective on egg production, egg and hatching weight and hatchability of fertile eggs (HFE) for 18% CP. In contrast, fertility (FR) (p<0.05) and hatchability rate of total eggs (HR) (p>0.05), EPEM (p>0.05) and MPEM (p>0.05) tended to decrease with increasing CP. It was found that there was egg production, egg (p>0.05) and hatching weight (p>0.05), FR (p>0.05), HR (p>0.05) and HFE (p>0.05) increased with increasing female for sex ratio. In terms of embryonic mortality, the EPEM (p>0.05) and LPEM (p>0.05) rate decreased with increasing female. For protein levels × sex ratio, it was found that hatchability traits were adversely affected for 15% CP-1:7. Also, it was determined that the lowest EPEM, MPEM and LPEM were determined for 7:1 in 18% CP group. Based on these results, to improve hatchability traits and a lower embryonic mortality rate, it may be beneficial to use 15% CP-5:1 or 18% CP-7:1 for pheasant breeding.
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