Comparative study of hormonal and seminal characteristic of cross-bred bulls and buffalo bulls.
1986
Sharma I.J. | Agarwal S.P. | Shukla S.P. | Dwaraknath P.K.
Eleven bulls and six buffalo bulls were taken for the study of serum testoerone, progesterone, oestradiol-17B and thyroid hormones viz triiodothyronine and thryroxine. A few seminal characteristics were also studied. An attempt was made to compare the levels of the hormones and seminal characteristics of the bulls with that of the buffalo bulls. The serum testosterone was about twenty times lower in buffalo bulls (0.77+0.03 ng/ml) than in the bulls (13.98+4.86 ng/ml). The serum thyroxine content was also low in buffalo bulls (49.66+4.40 ng/ml) as compared to the bulls (68+63+5.80 ng/ml). The volume of semen per ejaculation and mass motility of the spermatozoa in buffalo bulls were significantly lower as compared to that in bulls. It was inferred that slow breeding reflexes in buffalo bulls may be due to low hormonal levels.
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