Tharwat,, E., Shemeis, A., Abdallah, O., Khader, A., Abou-Steit, T. (2000). CHARACTERIZATION OF THE SINAI GABALI RABBITS IN TERMS OF MEAT PRODUCTION USING THE NEW ZEALAND WHITE AS A REFERENCE BREED. Journal of Animal and Poultry Production, 25(8), 4925-4932. doi: 10.21608/jappmu.2000.259599
E. E. Tharwat,; A. R. Shemeis; O. Y. Abdallah; Amina F. Khader; Thwayba Abou-Steit. "CHARACTERIZATION OF THE SINAI GABALI RABBITS IN TERMS OF MEAT PRODUCTION USING THE NEW ZEALAND WHITE AS A REFERENCE BREED". Journal of Animal and Poultry Production, 25, 8, 2000, 4925-4932. doi: 10.21608/jappmu.2000.259599
Tharwat,, E., Shemeis, A., Abdallah, O., Khader, A., Abou-Steit, T. (2000). 'CHARACTERIZATION OF THE SINAI GABALI RABBITS IN TERMS OF MEAT PRODUCTION USING THE NEW ZEALAND WHITE AS A REFERENCE BREED', Journal of Animal and Poultry Production, 25(8), pp. 4925-4932. doi: 10.21608/jappmu.2000.259599
Tharwat,, E., Shemeis, A., Abdallah, O., Khader, A., Abou-Steit, T. CHARACTERIZATION OF THE SINAI GABALI RABBITS IN TERMS OF MEAT PRODUCTION USING THE NEW ZEALAND WHITE AS A REFERENCE BREED. Journal of Animal and Poultry Production, 2000; 25(8): 4925-4932. doi: 10.21608/jappmu.2000.259599
CHARACTERIZATION OF THE SINAI GABALI RABBITS IN TERMS OF MEAT PRODUCTION USING THE NEW ZEALAND WHITE AS A REFERENCE BREED
1Department of Animal Production, Faculty of Agriculture, Ain Shams University, Shoubra Al-Kheima, 11241 Cairo, Egypt.
2Animal Production Research Institute, Dokki, Egypt.
3Desert Research Center, Matteria, Cairo, Egypt.
Abstract
Slaughtering and dissection data on 25 male Sinai Gabali rabbits serially slaughtered (at 4, 6, 8, 12 and 14 weeks of age) were used to characterize allometric growth patterns, composition and weight-distribution of empty body and carcass. A similar number of New Zealand White (NZW) rabbits were used as a reference breed.
Growth of body components relative to empty body weight (EBW), side entire joints relative to jointed side weight (JSW) and side major tissues relative to dissected side weight (DSW) were examined. The individual logarithmic regression slopes (growth coefficients) for Gabali and NZW rabbits were homogeneous for all body and carcass components and, thus, the common regression was used to represent the growth coefficient (b) for each component. Relative to EBW, the head, blood, feet, heart, lungs-plus-trachea, liver, alimentary tract, spleen and kidneys were early maturing (b<1), while, the pelt, abdominal fat and carcass were late maturing (b>1). As DSW increased the proportion of total side subcutaneous fat and total side intermuscular fat increased, that of total side bone and muscle to bone ratio decreased, while that of total side muscle remained almost without change (b=1). Relative to JSW, the fore limb was early maturing, while the other three joints (hind limb, loin and thoracic cage) followed an average pattern of growth (b=1).
At constant EBW, the Gabali rabbits had significantly (P<0.05) lighter carcass and abdominal fat and heavier pelt, heart, lungs-plus-trachea, liver and kidneys than the NZW. Comparing the two genotypes at equal DSW showed that the Gabali rabbits tend to have lower proportion of muscle and higher proportions of fat and bone. At constant JSW, the Gabali rabbits had higher proportions of hind limb, lower proportion of fore limb and similar proportions of loin and thoracic cage than the NZW. The paper related such results to physiological and behavioral patterns specific to the wild Gabali rabbits.
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