請用此 Handle URI 來引用此文件: http://hdl.handle.net/11455/45091
標題: Comparison of some selected growth, physiological and bone characteristics of capon, slip and intact birds in Taiwan country chicken cockerels
作者: Lin, C.Y.
許振忠
Hsu, J.C.
關鍵字: capon
slip
androgen
rectal temperature
comb area
blood parameters
bone traits
muscle growth
sex steroids
body-weight
testosterone
androgen
turkeys
hormone
rat
5-alpha-dihydrotestosterone
19-nortestosterone
期刊/報告no:: Asian-Australasian Journal of Animal Sciences, Volume 16, Issue 1, Page(s) 50-56.
摘要: An experiment was carried out to compare the body weight. shank lenght, rectal temperature, comb area, abdominal fat, blood parameters and bone traits of capon, slip and intact birds in Taiwan country chicken cockerels. One hundred and sixty-six Taiwan country chicken cockerels were randomly assigned to caponized or intact male groups. Caponized birds were surgically altered at 10 weeks old and raised to 28 weeks old. At 28 weeks of age, the capons were separated into capon and slip groups, depending oil the atrophy of the comb and wattle in size. The results showed that body weight and shank length in slips were significantly (p < 0.05) greater than in intact birds. Intact birds had the highest (p < 0.05) feather scores and the lowest (p < 0.05) rectal temperature. Compared with intact birds and slips, capons had a significantly (p < 0.05) smaller comb area. Bone percentage. stress and cortical thickness, and bone and ash calcium content and plasma testosterone concentration, in intact birds were the highest (p < 0.05) followed by slips and capons. Ho However, intact birds had the lowest (p < 0.05) plasma ionized calcium and phosphorus concentrations. Bone and ash manganese contents in capons were significantly (p < 0.05)low-er than those in others. These findings support the hypothesis that androgenic effects on secondary Sexual characteristics are stronger than anabolic growth promoting response. Androgens can directly influence calcium fluxes in male chickens. Caponized caused a reduction in the bone percentage. stress, cortical thickness and bone calcium content.
URI: http://hdl.handle.net/11455/45091
ISSN: 1011-2367
顯示於類別:動物科學系

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