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Articles by M.P. Mostari
Total Records ( 3 ) for M.P. Mostari
  S.A. Azmal , M.R. Amin , P.C. Goswami , M.P. Mostari , M.S. Islam and R. Khatun
  The experiment was conducted to compare the relative efficiency of homo and heterospermic insemination in respect of fertility judged by conception and calving rate. Spermatozoa from three different breeds of bull namely Holstein Friesian (HF), Red Chittagong (RC) and Sahiwal (SL) were mixed in equal number and preserved for 3 days and inseminated at different days. In this study 168 cows were inseminated and 42 of them were inseminated with heterospermic semen containing equal numbers of spermatozoa from a HF, a RC and a SL bull. After calving the paternity of calves was established by comparing coat colour and conformation. Difference between homo and heterospermic insemination on conception and calving rate was not significant (p>0.05). The heterospermic conception and calving rates were 80.95 ±0.07 and 64.29 ± 0.08%, with the homospermic rates being 66.67 ±0.04 and 50.79 ±0.04%, respectively. The conception and calving rate from heterospermic insemination was found insignificantly (p>0.05) different from that of homospermic insemination separately at first, second and third day of preservation. Conception rates of homo and heterospermic insemination at first day were 76.19 ±0.07 and 85.71 ±0.12%, respectively. The corresponding values at third day were 59.52 ±0.07 and 78.57 ±13%. Calving rate of homo and heterospermic insemination at first day were 57.14±0.08 and 64.29 ±0.13%, respectively. The corresponding values at third day were 45.24 ±0.08 and 64.29 ±0.13%. The numbers of offspring (12:8:7) sired by the three bulls (HF: RC:SL) after using heterospermic semen did not differ significantly from an assumed 1:1:1 ratio (χ2 = 1.55: p>0.05). The sex ratios among calves from heterospermic insemination (15♂ .12♀) also did not differ significantly (χ2 = 0.34: p>0.05) from 1:1. From the above results, it was concluded that heterospermic insemination did not however, show any significant superiority in conception and calving rate in cows compared to homospermic insemination. However, heterospermic insemination offers no apparent risk to co-operating farmers, since overall conception and calving rate were either numerically higher or at least equal to that obtainable from homospermic insemination.
  S.A. Azmal , M.R. Amin , H. Khatun , M.S. Islam , M.P. Mostari and P.C. Goswami
  The experiment was conducted to compare the relative efficiency of homo and heterospermic bull semen in terms of preservation quality. Spermatozoa from three different breeds of bull namely Holstein Friesian (HF), Red Chittagong (RC) and Sahiwal (SL) were mixed in equal number and preserved for 3 days. The quality of semen in terms of mass motility, normal and live sperm content of homo and heterospermic semen were studied at various preservation periods. In total 312 samples were included in the analysis. The average (%) mass motility, normal and live sperm of homospermic semen were 51.77 ± 0.49, 77.55 ± 0.45 and 78.73 ± 0.44 respectively and for heterospermic semen the corresponding values were 59.94 ± 0.85, 83.55 ± 0.78 and 83.69±0.76. The significantly (p<0.001) highest mass motility, normal and live sperm percentages were observed in heterospermic semen as compared to homospermic semen. The quality of semen between homo and heterospermic semen in terms of mass motility, normal and live sperm percentage did not differ significantly (p>0.05) between groups at first day but differed significantly (p<0.001) at second and third day of preservation. Mass motility of homo and heterospermic semen at first day were 60.77±0.55 and 62.31±0.95%, respectively. The corresponding values at third day were 44.04 ± 0.44 and 57.12 ± 0.77%. Normal sperm of homo and heterospermic semen at first day were 86.50 ± 0.43 and 86.31 ± 0.74%, respectively. The corresponding values at third day were 70.36 ± 0.38 and 81.00 ± 0.66%. Live sperm of homo and heterospermic semen at first day were 86.56 ± 0.43 and 86.54 ± 0.75%, respectively. The corresponding values at third day were 71.54 ± 0.46 and 81.42 ± 0.79%. From the above results, it was concluded that heterospermic semen could be better preserved in terms of mass motility, normal and live sperm percentage compared to homospermic ones.
  M.P. Mostari , M.S. Hasanat , S.A. Azmal , K.N. Monira and H. Khatun
  The data of the present study were collected from Bangladesh Milk Producer`s Co-operative Union Limited (BMPCUL) at Baghabarighat, Sirajgonj to investigate the bull performance among various seasons through semen quality and 30-day non return rate. To evaluate the seasonal variation on semen quality and bull fertility the experimental period was divided into three seasons; a) Summer season (March to June), b) Rainy season (July to October) and c) Winter season (November to February). Data on 245 ejaculates and 12,750 services of almost same aged 5 Sahiwal bulls (B1, B2, B3, B4 and B5) over a period of 5 years were collected from Animal Breeding section and Cattle Feed Unit of BMPCUL. The performance of five bulls was compared in three seasons i.e. summer, rainy and winter and summer was observed to be the best for most parameters studied. Seasons had significant (p<0.05) effect on semen volume, initial and post- thawing sperm motility and pH of semen but not on sperm motility of diluted semen and fertility. The significant (p<0.01) bull x season interaction was noticed in semen volume, sperm motility at initial and post-thawing stages, pH and fertility but not on sperm motility of diluted semen.
 
 
 
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