Evaluation of Weight and Growth Rates of Awassi Sheep Lambs

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Ahmad Q. Al-Moman
Mysaa Ata
Khaled A. Al-Najjar


This study was conducted at Al-Fjaj station using of 2262 records to evaluate some non-genetic factors affecting Awassi lambs body weight and growth rate in Jordan. Data were analyzed by SAS program using General Linear Model (GLM). Least Square Means of body weight at birth (BW), at weaning -60 days (W60), at the age of 180 days (W180) and yearling age (W360), were 4.43±0.04, 18.07±0.21, 35.96±0.35, 59.71±0.94 kg, respectively. Growth rates from birth to weaning (GR1), from weaning to 180 days of age (GR2) and from 180 days to yearling age (GR3), were 0.216±0.03, 0.141±0.03, 0.131±0.002 (kg/day), respectively. All studied traits were significantly affected (p<0.01) by year of production (YP) and interaction between birth type (BT) and (YP). Sex of lamb (SL) had a highly significant effect (p<0.01) on BW, W60 and GR1. The BW, W60 and GR2 were significantly affected (p<0.01) by (BT) and also W180 and GR2 were significantly affected by (BT) and age of ewe (AE), respectively. The results of the present study suggested that lamb body weight and growth rate could be increased by improved management of Awassi lambs under rearing condition in Jordan.

Weight, growth rate, Awassi lambs, year of production, Jordan

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Al-Moman, A. Q., Ata, M., & Al-Najjar, K. A. (2020). Evaluation of Weight and Growth Rates of Awassi Sheep Lambs. Asian Journal of Research in Animal and Veterinary Sciences, 5(3), 26-32. Retrieved from http://journalajravs.com/index.php/AJRAVS/article/view/30094
Original Research Article


FAO; 2017.
Available:www. fao.org/ faostat /en#/data /QA

FAO. The second report on the State of the World’s Animal Genetic Resources for Food and Agriculture, edited by BD Scher and D Pilling. FAO Commission on Genetic Resources for Food and Agriculture Assessment, Rome; 2015.
Available: www .fao.org/3/a-i4784e.pdf

Zidane A, Niar A, Ababou A. Effect of some factors on lamb's growth performances of the Algerian Ouled Djellal breed. Livestock Research for Rural Development. 2015;27(7):1-11.

SAS. Institute Inc.: SAS/STAT User’s Guide: Version 9.3, SAS Institute Inc., Cary, NC, USA; 2012.

Duncan DB. Multiple range and multiple F test. Biometrics. 1955;11.1.

Momoh OM, Rotimi EA, Dim NI. Breed effects and non-genetic factors affecting growth performance of sheep in a semi-arid region of Nigeria. Journal of Applied Biological Sciences. 2013;67:5302-5307.

Ganesan R, Dhanavanthan P, Balasubramanyam D, Kumarasamy P. Estimates of genetic parameters of growth traits in Madras Red sheep. IOSR Journal of Agriculture and Veterinary Sciences. 2013;3(5):69-73.

Khan NN, Kumar N, Das AK, Chakraborty D, Gupta P. Birth and weaning weights in Rambouillet crossbred sheep. Indian Veterinary Journal. 2013;90(5):36-37.

Das AK, Chakraborty D, Kumar N, Gupta P, Khan N, Bukhari S. Effects of non-genetic factors on performance traits of Kashmir Merino sheep. Indian Journal of Animal Research. 2014; 48(2):106-108.

Zaffer V, Taggar RK, Chakraborty D. Non-genetic factors affecting growth and production traits in Dorper crossbred sheep. Journal of Animal Research. 2015;5(2):227-230.

Chakraborty D, Zaffer V, Anamika A, Rameez M, Kumar D, Taggar RK. Genetic studies on growth traits and growth rates in Dorper Crossbred sheep. Asian Resonance. 2015;4(2):29-32.

Chakraborty AD, Taggar RK, Singh S, Azhar PM, Gupta P. Effects of non-genetic factors on body weight traits in Rambouillet Sheep. International Journal of Current Microbiology and Applied Sciences. 2018;7(12):1408-1413.

DOI: www. doi.org/10.20546/ijcmas

Gardner DS, Buttery PJ, Daniel Z, Symonds ME. Factors affecting birth weight in sheep: Maternal environment. Reproduction. 2007;133:297-307.

Yilmaz O, Denk H, Bayram D. Effect of lambing season, sex and birth type on growth performance on Nordus Lambs. Small Ruminant Research. 2007;68:336-339.

Reddy D, Sreenivas D, Gnanaprakash M, Harikrishna C. Genetic analysis of growth performance of Nellore Brown sheep. International Journal of Science Environmental and Technology. 2017;6(1):774-778.

Rashidi A, Mokhtari MS, Safi Jahansahi A, Mohd Abadi MR. Genetic parameter estimates of pre-weaning growth traits in Kermani Sheep. Small Ruminant Research. 2008;74:165-171.

Sudan A. Genetic studies and trends on performance traits in Rambouillet sheep. Thesis submitted to Shere-Kashmir University of Agricultural Sciences and Technology of Jammu, Jammu & Kashmir, India; 2018.

Uluta Z, Sezer M, Aksoy Y, Sirin E, Sen U, Kuran M, Akbas Y. The effect of birth type on growth curve parameters of Karayaka Lamb. Journal of Animal and Veterinary Advances. 2010; 9(9):1384-1388.