Endocrine and hematobiochemical profile of lambs raised in a semiarid region with different growth potentials during the postweaning period

Authors : Shiva Pratap SINGH, Gopal DASS, Ramachandran NATESAN, Yogender KUSHWAH, Nandini SHARMA, Ashok KUMAR

Pages : 120-129

View : 26 | Download : 11

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :This study was conducted for establishment of the relationship of blood variables with growth rate of postweaned lambs. Eight lambs each of fast growth insert ignore into journalissuearticles values(FG; 11.6 ± 0.5 kg live wt. at weaning); and slow growth insert ignore into journalissuearticles values(SG; 7.7 ± 0.5 kg live wt. at weaning); were monitored fortnightly for endocrine and hematobiochemical variables along with parasitic load and growth performance. Recording of body weight insert ignore into journalissuearticles values(BW); and average daily gain insert ignore into journalissuearticles values(ADG); was performed monthly from birth to 180 days. Triiodothyronine insert ignore into journalissuearticles values(T3); and thyroxine insert ignore into journalissuearticles values(T4); were significantly insert ignore into journalissuearticles values(P < 0.05); higher while thyroid-stimulating hormone insert ignore into journalissuearticles values(TSH); and insulin-like growth factor-1 insert ignore into journalissuearticles values(IGF-1); were significantly insert ignore into journalissuearticles values(P < 0.05); lower in FG lambs compared to SG lambs. Blood cell counts, hematocrit, hemoglobin, mean corpuscular volume, and mean corpuscular hemoglobin were significantly insert ignore into journalissuearticles values(P < 0.05); higher in FG lambs compared to SG lambs. Except for the birth wt., the BW and ADG of FG lambs were significantly insert ignore into journalissuearticles values(P < 0.05); higher at all time points. Liver enzymes insert ignore into journalissuearticles values(alkaline phosphatase and alanine aminotransferase); and triglyceride were significantly insert ignore into journalissuearticles values(P < 0.05); higher in SG lambs compared to FG lambs. These findings indicate a significant influence of growth rate on peripheral concentrations of endocrine and some hematobiochemical variables in lambs. These selected variables can be used for early identification and culling of slow-growing lambs for better economic return to lamb producers.
Keywords : Endocrine variables, growth potential, hematobiochemical variables, lamb