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The Indian Council of Agricultural Research (ICAR) is an autonomous organisation under the Department of Agricultural Research and Education (DARE), Ministry of Agriculture, Government of India. Formerly known as Imperial Council of Agricultural Research, it was established on 16 July 1929 as a registered society under the Societies Registration Act, 1860 in pursuance of the report of the Royal Commission on Agriculture. The ICAR has its headquarters at New Delhi.

Journal Article

Journal article

Age related changes in body size and gonadal development of growing Frieswal bulls  [2004]

Mandal, D.K.; Singh, K.; Tyagi, S. (Project Directorate on Cattle, Meerut Cantt (India));

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The study was conducted on 20 young Frieswal bulls (cross between Holstein - Friesian (HF) x Sahiwal; having 5/8 exotic (HF) inheritance) during their pubertal period (9-18 months old) to find out the age realted changes in body and gonadal development. The overall body weight of young Frieswal bulls at 9 months of age was 195.20ñ4.03 kg which increased nearly 2 folds (368.00ñ7.18 kg) at 18 months of age. The heart girth, body length, rear grith and height at withers incsreased to 23, 24.3, 19 and 17.9%, respectively, during this period. Scrotal circumference, testicular length, breadth and width/thickness increased almost linearly during the pubertal period. At 18 months of age, paired testicular volume (PTV) and weight (PTW) was increased by 2.75 and 2.03 times respectively, from 9 months of age. Overall dimensions of the left testicle were always less than that of the right I throughout the entire study period. In different stages of growth period, the PTV increased by 49.39,48.96 and 23.80% during 12, 15 and 18 months of age, respectively, and the corresponding values in PTW were 28.45, 24.24 and 27.30% respectively. The testicular weight: volume ratio was 1.3:1,1.1:1,0.9:1 and 0.9:1 at 9,12,15 and 18 months of age, respectively, which showed a declined trend with advancement of age. During 9 to 15 months of age the PTV and PTW increased by 122.5 and 59.57%, respectively, whereas during 16 to 18 months it was 23.81 and 27.30% respectively. During puber
ty gonadal development was faster as compared to general body (weight and measurement) development and within the pubertal period testicular development was faster in earlier part (9-15 months) as compared to the later part (16-18 months of age).

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Indian Journal of Animal Sciences (India)

ISSN : 0367-8318