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Biomedical subjects

C S Bahga

Publications and source records attributed to C S Bahga.

7 recordsLinked to original sources
PubMed1991

Effect of different seasons on concentration of plasma luteinizing hormone and seminal quality vis-à-vis freezability of buffalo bulls (Bubalus bubalis).

Seasonal variations in semen quality, freezability and plasma luteinizing hormone (LH) levels were studied between summer and spring. Semen volume, density and initial sperm motility did not differ significantly between different seasons. Plasma LH decreased between summer and spring but the differences were, however, not significant. Pre-freezing motility did not differ significantly but post-freezing motility varied significantly (P less than 0.01) between seasons. Post-freezing motility was lowest during summer and highest during winter. It can be concluded that summer spermatozoa may be fragile and cannot withstand freezing stress. To increase reproductive efficiency in buffalo during summer, semen should be frozen during winter and spring and used during hot weather conditions. Seasonal variations in plasma LH levels were insignificant.

Animals↗
PubMed1989

Plasma progesterone concentration and reproductive function relative to thyroid activity in postpartum buffaloes (Bubalus bubalis).

The lowest value for plasma protein bound iodine (PBI) (3.47 micrograms %) in 20 freshly calved Murrah buffaloes was observed on day 1 postpartum. The values then increased consistently up to day 36 and were almost constant thereafter. The plasma progesterone concentrations were lower in animals with relatively low PBI from day 22 to 57 postpartum, except on day 36. The mean values +/- SE (ng/ml) in the high and low PBI groups were 0.93 +/- 0.09 and 0.72 +/- 0.15. The correlation coefficient between PBI and progesterone was 0.80 (p less than 0.01). Relatively poor reproductive efficiency, in terms of a higher initiation of follicular development interval, postpartum oestrus interval, service period and number of services for conception, was observed in animals in the low PBI group.

Analysis of Variance↗
PubMed1989

Thyroid function in relation to reproductive efficiency in postpartum buffaloes (Bubalus bubalis) during summer and winter.

Thyroid function was studied by estimating of plasma-protein-bound iodine (PBI), in buffaloes, from 0 to 57 days postpartum. PBI values (microgram/100 ml) were lowest on day 1 postpartum, followed by a gradual increase by day 57. The values were consistently lower (P less than 0.01) during summer (3.79 +/- 0.13 micrograms/100 ml), as compared to winter (5.06 +/- 0.27). A lower value (P less than 0.01) was obtained in animals requiring less than 30 days (3.53 +/- 0.45) or more than 30 days (4.88 +/- 0.27) for uterine involution. The values were 4.56 +/- 0.13, 5.03 +/- 0.68 and 2.72 +/- 0.50 in animals requiring less than 25, 25-50 and more than 50 days for initiation of follicular development (P less than 0.01). Similarly the values were 4.95 +/- 0.38, 3.95 +/- 0.45 and 4.03 +/- 0.59 in buffaloes having postpartum oestrus intervals less than 45, 45-90, and more than 90 days (P less than 0.01). Higher values (P less than 0.05) were obtained in conceiving (4.55 +/- 0.41), as compared to non-conceiving animals (4.21 +/- 0.31). It can be concluded that the thyroid function is depressed during summer and in poorly reproducing buffaloes.

Animals↗
PubMed1988

Seasonal variations in plasma hormones and reproductive efficiency in early postpartum buffalo.

Investigations were carried out on twenty newly calved Murrah buffalo that were divided into two sets of ten each during winter (December to February) and summer (May to September). Recommended feeding and management practices were followed. Blood samples were collected on Days 0, 1, 2, 4, 6, 8, 15, 22, 29, 36, 43, 50 and 57 postpartum for hormone radioimmune assay (RIA). The values of reproductive parameters and hormone levels during winter and summer, respectively, were the following for uterine involution, 39.50 +/- 2.74 d and 32.50 +/- 3.01 d; first postpartum estrus interval, 70.10 +/- 9.62 d and 37.40 +/- 11.82 d; number of services per conception, 1.57 +/- 0.29 and 2.40 +/- 0.68; first service conception rate, 40 and 20 %, overall conception rate, 70 and 40 %; 13,14-Dihydro-15-keto prostaglandin F(2alpha) (PGFM), 1.78 +/- 0.26 ng/ml and 2.62 +/- 0.30 ng/ml; progesterone, 1.09 +/- 0.14 ng/ml and 0.65 +/- 0.77 ng/ml. A negative correlation (r = -0.83, P 0.05 ) was observed between PGFM and progesterone. Although, summer stress hastens uterine involution and first postpartum estrus interval, overall reproductive efficiency is impaired due to deficiency of progesterone, which is essential for embryo survival.

Journal Article↗
PubMed1987

The effect of cooling on the blood composition and seminal characteristics of crossbred bulls.

In 8 healthy cattle bulls (6 Holstein Friesian X Red Dane X Sahiwal and 2 Holstein Friesian) the effect was studied of cooling on the blood and seminal parameters during the hot summer months June to September in Ludhiana, Punjab, India. Favourable effects were found only in some blood values. The seminal characteristics do not differ from those of the control group. Rectal body temperatures remained also constant, whereas the respiration rates were higher in the control group.

Air Conditioning↗