Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/68124
標題: Effects of caponization and testosterone on bone and blood parameters of SCWL male chickens
作者: Chen, K.L.
Tsay, S.M.
Lo, D.Y.
Kuo, F.J.
Wang, J.H.
Chiou, P.W.S.
關鍵字: bone characteristic
caponization
male chicken
testosterone
implantation
sex steroids
growth
castration
fowl
期刊/報告no:: Asian-Australasian Journal of Animal Sciences, Volume 20, Issue 5, Page(s) 706-710.
摘要: This study was to investigate the caponization effects on bone characteristics in male chickens, and the optimum testosterone implantation dosage on bone characteristics improvement. Healthy Single Comb White Leghorn cockerels were caponized at 12-wk-old and selected at 16-wk-old for a 10-wk feeding experiment. Fifteen intact male and caponized male chickens (capon) respectively were assigned to trial 1. Ten sham-operated chickens and 40 capons (randomly allocated into four treatments) were implanted with cholesterol (1.62 mm i.d., 3.16 mm o.d., 9.24 +/- 0.36 mg), low (I mm i.d., 3 min o.d., 5.88 +/- 0.23 mg), medium (1.62 mm i.d., 3.16 mm o.d., 9.81 +/- 0.17 mg) or high dose (2 mm i.d., 4 mm o.d., 16.7 +/- 0.24 mg) of testosterone in trial 2. The results from trial I showed that the tibia length, relative tibia weight, breaking strength, bending moment and stress in intact males were higher than capons (p<0.05). The blood phosphorus concentration in capons was higher than the intact male chickens (p<0.05). Caponization also resulted in more antrums and osteoclasts within periosteum and cortical bone from histological observation. In trial 2, the adverse impact of caponization on the bone breaking strength, bending moment and stress could be alleviated through medium dose testosterone implantation. It appears that caponization reduced androgen secretion hence influenced the biomechanical characteristics of bone (tibia) and these adverse effects could be alleviated through appropriate dose of testosterone implantation.
URI: http://hdl.handle.net/11455/68124
ISSN: 1011-2367
Appears in Collections:期刊論文

文件中的檔案:

取得全文請前往華藝線上圖書館



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.