Fertility Characteristics in Dairy Buffaloes: Probability Modeling : Probability Distribution Modeling for Reliability Analysis of Reproductive Traits and Prediction of Fertility Losses

ISBN-13: 9783330030756 / Angielski / Miękka / 2017 / 120 str.

Sohail Ahmad

Opis

Major objective of present study is to determine probability distributions for reliability analysis of fertility characteristics and prediction of fertility loss in 558 calving events among 162 sample dairy buffaloes. Study variables are Lactation Number (LN), Age-at-First-Calving (AFC), Service Period (SP), Gestation Period (GP), Lactation Length (LL), Dry Period (DP), and Calving Interval (CI). LN(X) follows Poisson distribution showing reproductive benefits as 91.6% at X 5 lactations. AFC (mean=1744 d=days) has Log-Normal distribution showing survival estimate S(t)=86.6% leading to fertility loss when AFC 1500d. Abortions represent failure of gestation with age (mean=1627d) indicating most critical fertility loss. CI (mean=483d) has Log-Normal distribution; SP (mean=183d) & DP (mean=240d) have Weibull distribution; GP (mean=309d) & LL (mean=301d) have Normal distribution. Fertility loss, measured by Fertility-Loss-Index (FLI), shows loss of CI ideal period (400d) or acceptable period (520d). The FLI of ideal CI is 0.72 and FLI of acceptable CI is 0.66 per buffalo. Most critically abortions show FLI of ideal CI is 0.45 and acceptable FLI of acceptable CI is 0.35 per buffalo.

O autorze

My name is SOHAIL AHMAD. Educational qualification is M.Phil Statistics 2016 M.Sc. 1996, and OCP Oracle DB 8/8i. I have the experience of preparing Economic and Financial Feasibility Models of highways development projects and livestock sector, Statistical Analysis and Research Reports of social surveys for above 20 years (April 1996 - June 2016).