Awad, M., Abou-Bakr, S. (2024). ASSESSMENT OF LONGEVITY AND LIFETIME PRODUCTION TRAITS IN EGYPTIAN BUFFALO. Egyptian Journal of Animal Production, 61(3), 103-111. doi: 10.21608/ejap.2024.305971.1086
Mohamed Attia Ahmed Awad; Samy Abou-Bakr. "ASSESSMENT OF LONGEVITY AND LIFETIME PRODUCTION TRAITS IN EGYPTIAN BUFFALO". Egyptian Journal of Animal Production, 61, 3, 2024, 103-111. doi: 10.21608/ejap.2024.305971.1086
Awad, M., Abou-Bakr, S. (2024). 'ASSESSMENT OF LONGEVITY AND LIFETIME PRODUCTION TRAITS IN EGYPTIAN BUFFALO', Egyptian Journal of Animal Production, 61(3), pp. 103-111. doi: 10.21608/ejap.2024.305971.1086
Awad, M., Abou-Bakr, S. ASSESSMENT OF LONGEVITY AND LIFETIME PRODUCTION TRAITS IN EGYPTIAN BUFFALO. Egyptian Journal of Animal Production, 2024; 61(3): 103-111. doi: 10.21608/ejap.2024.305971.1086
ASSESSMENT OF LONGEVITY AND LIFETIME PRODUCTION TRAITS IN EGYPTIAN BUFFALO
Department of Animal Production, Faculty of Agriculture, Cairo University, Giza 12613, Egypt
Abstract
The current study aimed to assess the longevity and lifetime production traits in Egyptian buffalo and to evaluate the influence of age at first calving (AFC), first lactation milk yield (FLMY), and other environmental factors on such traits. Data on 1769 lactation records of 307 Egyptian buffalo were collectedfrom the history databases of three herds to cover the period from 1996 to 2022. The longevity traits were herd life (HL), productive life (PL), buffalo efficiency index (BEI), and number of lactations (NL); whereas, lifetime production traits included lifetime days in milk (LDIM), lifetime milk yield (LMY), lifetime daily milk yield (LDMY), coefficient of lactation (CL), milk yield per day of herd life (MY/HL), milk yield per day of productive life (MY/PL), and longevity index (LI). The least squares mean (LSMs) of longevity traits were 3898.4±31.1 days, 2732.8±30.8 days, 65.6±0.3%., and 6.9±0.1 lactations for HL, PL, BEI, and NL, respectively. The LSMs of lifetime production traits were 1522.2±19.2 days, 12045.6±160.8 kg, 7.5±0.1 kg/day, 60.4±0.5%, 3.0±0.03 kg/day, 4.7±0.1 kg/day, and 39.1±0.4% for LDIM, LMY, LDMY, CL, MY/HL, MY/PL, and LI, respectively. The effect of the herd, AFC, FLMY, and period of first calving was significant (P < 0.05,P < 0.01, and P < 0.001) on all studied traits. The season of first calving significantly affected all studied traits except MY/PL. It can be concluded that the significant environmental factors examined in this study should be considered when planning the management policy and adjusted to achieve more accuracy in the genetic evaluation of selected animals for the studied traits in Egyptian buffalo.
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