The Present study was conducted to retrospectively analyze the pattern of calf mortality (0 to 1 year age) from 1992 to 1993 to 2015 to 2016 in an organized Murrah buffalo herd maintained at Central Institute for Research on Buffaloes (CIRB), Hisar, Haryana. During the study period, highest calf mortality (8.35 percent) was observed inperiod P1 (1992 to 1995), while lowest mortality (2.64 percent) was observed in P7 (2010 to 2013) with an overall mortality rate of 4.94 percent from1992 1993 to 2015 to 2016 over the period of twenty five years.The overallage-specific mortality (9.5 percent) was observed highest in Group I: birth to three months age,while lowest mortality (2.5 percent) was observed in Group 3: 6 to 12 months age. There was no significant difference in overall sex-specific mortality (P LT= 0.01) over the period of twenty four years. Highest proportionate mortality rate (37.6 percent) was observed during winter season and greatest losses in terms of proportionate mortality rate (30.7 percent) were attributed to gastrointestinal plus pneumonia causes of mortality. Chi square test depicted statistically significant association of period, age group, season and cause of deathwith the calf mortality at P LT = 0.01. Retrospective investigation indicates that overall calf mortality rate from birth to one year of age was much lesser during the recent period (P7: 2.6 percent, P8: 3.1 percent) possibly attributed to good husbandry conditions including routine vaccination schedule, optimum colostrum feeding and improved nutritional management as contributing factors here for a steady improvement in the management and health status of calves through time. Based on findings of the highest mortality up to 3 months age (9.5 percent) in the present study, proper hygienic conditions in calf sheds, adequate healthcare, appropriate colostrum feeding and good husbandry conditions during this critical period are recommended to minimise the calf exposure to new infections.

The theme of investigation was the group of 1230 Murrah buffaloes at the dairy farm of GADVASU, Ludhiana. The research was conducted for the period of forty years 1971 to 2010, to make out the mortality prototype at this organized herd. An overall 1230 animals died because of various causes during these forty years, which accounted for overall mortality of 29.36 percent of total herd. Maximum mortality in different age groups of calves was due to affections of digestive system. Mortality up to one month of age was 52.35 percent indicating that almost half of the calves died during first month of age. The mortality rate declined to 11.95 percent up to three month of age in calves and mortality rate further declined to 5.44 percent up to six month of age. The mortality rate further declined to 4.88 percent of total mortality up to one year of age. The cumulative mortality up to one year of age was 74.62 percent, which indicated that two-third of the total mortality occurred up to one year of age. Out of all the lactations maximum mortality is found in first lactation and minimum mortality is observed in 10th and above lactation. Higher incidence of mortality was found to be in the month of August 13.5 percent while lowest mortality percentage is found in the month of October i.e. 3.52.

During the last years buffalo reproductive researchers have been tried to develop and apply fixed timed artificial insemination protocols to increase pregnancy rates to maximize improvement. The objective of this paper is to evaluate the pregnancy rates of different protocols of synchronization (Ovsynch and progesterone implants) and resynchronization of ovulation in a meat water buffalo herd during reproductive season of 2016. 194 mature Mediterranean females, were randomly assigned to four different protocols, ultrasound evaluation were used to determine cyclicity (presence of corpus luteum or follicles GT= 7 mm de diameter). 18 days after insemination all females were resynchronized and at day 25 ultrasound were performed, those nonpregnant females were inseminated 28 days after first insemination. All inseminations were performed by the same technician and only one bull was used. InfoStat software was used, statistical significance was considered when p value was lower than α of the 5 percent. No statistical significance were found within the protocols. Early embryonic dead 50 days after IA was 3.4 percent. Pregnancy rate was 47.9 percent and 53.5 percent for insemination and reinsemination respectively and the final pregnancy rate after the adjust for early pregnancy loss 73.2 percent, during the 28 days of the breeding period. The results obtained allow breeders to choose the best pharmacological option to use FTAI in their herds based on their own needs to improve production without affecting pregnancy rates.