신생기에 Testosterone 투여가 돼지의 혈중 성장호르몬과 생산성에 미치는 영향 = The Effects of Neonatal Testosterone Administration on Serum Growth Hormone and Growth Performance in Swine

다국어 초록 (Multilingual Abstract)

The current study was undertaken to determine whether neonatal testosterone treatment affected serum growth hormone concentration and growth performance (body weight gain and backfat thickness) in growing pigs. A total of 32 male Piglets from 8 sows (4 per sow) were allocated to one of 4 treatments (four piglets from one litter were allocated to 4 treatments evenly). Piglets in treatment(Trt) 1 (NC) were castrated within 24 hr after birth. piglets in Trt 2 (NC+T) were injected with 10 ㎎ of testosterone propionate after being castrated within 24 hr after birth. Piglets in lit 3 (PC) were castrated at 3 week of age. Piglets in Trt 4 (INT) were never castrated. Body weight was measured at 3 week, 6 week, 3 month, 4 month and 5 month of age, and backfat thickness at , month. 4 month and 5 month of age. Serum testosterone and growth hormone concentrations were measured at 5 month of age. There was no significant difference in overall body weight gain during 5 months of period among treatments. However. during 3-4 month of age, body weight gain of NC+T. PC and INT Trts was significantly increased (P$lt;0.01). compared to that of NC Trt, indicating that testosterone treatment stimulated body weight gain. Only INT Trt showed higher body weight gain and thinner backfat than other Trts during 4-5 month of age. Serum testosterone was higher (P$lt;0.01) in INT Trt, compared to other Trts. There was no significant difference in serum: growth hormone concentration among treatments.