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- W211571859 abstract "Knowledgo -n age distribution. expect,edherd life and replacement rate of milch animals is necessary to determine culling poliCies. and to draw sele~tion and breed~ng programmes for their Improvement. The present investigation was taken up as no. information on this aspect on Indian buffalo is available. The data were collected from the lacta'tion records of Murrah buffaloes of this !ll.$titute. A progeny-testing programme was initiated in 1972 under the Co-oIdip.~ted Research Project on Buffaloes wherein a set of 8 sires was put to test about every 16 months. Female calves were retli'ined in the herd till they com pleted theIr first lactation. To cope up with the gro)ving number of breedable heifers joining the milch herd from 1975 onwards, rigo~ous culling twice a year Was practised iillJ.il attempt to maintain the herd strePgth to 300 breedable buffaloes. The average herd life is defined as the number ofla.ctations completed in the herd by the bllt{alo cows that left the herd. Herd life . expectancies were calculated io terms of lactation number by : e = t,d Ix. Where, ex is the average expectation of life atthe lactation x, t is the total population .after lactation x and lx is the number of animals in the lactation x. Replacement rate may be defined as the probability of a random buffalo cow frolll the population having an offspring iua;given year which subsequently enters tbe!llilking population. The parameter" @default.
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- W211571859 date "1980-01-01" @default.
- W211571859 modified "2023-09-23" @default.
- W211571859 title "Note on age structure, herd life and replacement rate in Murrah buffalo herd." @default.
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