jzs-10660

Prediction of body weight from body dimensions in Karadi sheep

Goran Mohammad Karim1 & Chnoor Mhamad Karym1

1 Animal Science Department, College of Agricultural sciences - Sulaimani University 


Abstract

Animal live body weight is an important feature, but can seldom be measured in rural areas due to lack of reasonable accurate scales. Hence, farmers have to rely on questionable estimates of the body weights of their sheep, leading to inaccuracies in decision making. The primary method of weighing animals without scale is to regress body weight to body characteristics, which can be measured readily. Experiment was carried out on 100 males and 100 females of Karadi sheep at 12 months of age, Data for body weight and linear body measurements were taken at traditional private sheep farms in Sharazoor-Halabja, Kurdistan region-Iraq. Result of Body weight (BW) of males and females were 38.98±0.68 and 37.53±0.75 kg, respectively. Body length of males and females were 68.83±0.28 and 67.49 ± 0.32 cm, respectively. Moreover, heart girth of males and females were 89.63 ± 0.27 and 87.98 ± 0.25 cm, respectively. Furthermore, height at wither of males and females were 64.71± 0.30 and 67.53 ± 0.18 cm, respectively. Chest width of males and females were 17.49 ± 0.07 and 16.81± 0.07 cm, respectively. While chest depth of males and females were 30.19 ± 0.11 and 29.66 ± 0.11 cm, respectively. It was observed that based on the result of the optimum multiple regression equation of predictive body weight of male Karadi sheep (Minimum C(p) and highest R2 values) the proposed equation is as follows:

= 1.431 body length + 1.0107 heart girth + 0.050 height at wither + 0.312 chest width - 0.137 chest depth - 154.727

Similarly, the optimum multiple regression equation of predictive body weight of female Karadi sheep (low C(p) and highest R2 values) the proposed equation is as follows:

= 0.974 body length + 0.232 heart girth + 0.366 height at wither + 2.678 chest width + 1.331 chest depth - 158.005 

  Key Words: Karadi sheep,body weight,body dimensions,correlation and regression.



References:

 [1] Osinowo, O. A., Olorunju, S. A. S., Otchere, E. O. and Arigi, L. A. “Development of a weight band for Yankasa sheep and Red Sokoto goats”. Paper presented at the 14th Animal Conference of the Nigerian Society for Animal Production held at Makurdi, 2-6 April, 1989. (1989).

[2] Baffour-Awuah, O., E. Ampofo and R. Dodoo. “Predicting the live weight of sheep by using linear body measurements”. Ghana Jnl Agric. Sci. 33,207-212. (2000).

[3] Minitab Inc. “Basic of stepwise regression”. Regression Analyses in Minitab. (2016).

[4] Wikipedia, the free encyclopedia. http://en. Wikipedia.org/wiki. (2017).

[5] Draper, W. R. & Smith, H. “Applied regression analysis”, 2nd ed. New York, Wiley. (1981).

[6] SAS, “Statistical analyses system”. SAS/STAT User's Guide, Version 8, First edition, Cary, NC, USA. (2002).

[7] Alkass, Jalal E. and Kays H. Juma. "Small ruminant breeds of Iraq. Characterization of small ruminant breeds in West Asia and North Africa". Vol. 1: West Asia. International Center for Agricultural Research in the Dry Areas (Iniguez, luis. Ed) (ICARDA), Aleppo, Syria.: 63 – 90. En. (2005).

[8] Hoseini, V.M., Miraei Ashtiani, R., Pakdel, A. and Moradi, H. “Evaluation the accuracy of body linear measurements in Moghani lambs to predict carcass production and carcass fat content after slaughter”. The 4th Iranian Congress on Animal Science, Karaj, Iran. (2010).

[9] Cankaya, S., Altop, M., Olfaz, M. and Erener, G. “Canonical correlation analysis for estimation of relationships between some traits measured at pre and post slaughtering periods in Karayaka hoggest”. Anadolu Journal of Agricultural Sciences. 24, 61-66. (2009).

[10] Abdel – Moneim, A.Y. “Use of live body measurements for prediction of body and carcass cuts weights in three Egyptian breeds of sheep”. Egyptian Journal of Sheep & Goat Sciences. 4(2), 17-32. (2009).

[11] Shirzeyli, F. H., A. Lavvaf and A. Asadi1. “Estimation of body weight from body measurements in four breeds of Iranian sheep". The Songklanakarin Journal Sciences Technol. 508 35 (5): 2013, page:  507-511. (2013).

 [12] Cam, M.A., M. Olfaz and E. Soydan. "Body Measurements Reflect Body Weights and Carcass Yields in Karayaka Sheep". Asian Journal of Animal and Veterinary Advances, 5: 120-127. (2010).

[13] Younas, U, M. Abdullah, J. A. Bhatti, T. N. Pasha, N. Ahmad, M. Nasir and A. Hussain. "Interrelationship of body weight with linear body measurements in Hissardale Sheep at Different stages of Life". The Journal of Animal & Plant Sciences, 23(1): 2013, Page: 40-44. (2013).