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Morphological Indices and Simple Regression to Predict Live Body Weight from Morphological Traits of Indigenous Sheep

Morphological Indices and Simple Regression to Predict Live Body Weight from Morphological Traits of Indigenous Sheep

Muhammad Arsalan1, Muhammad Aman Ullah1 and Abdul Waheed2,*

1Department of Statistics, Bahauddin Zakariya University, Multan
2Department of Livestock and Poultry Production, Bahauddin Zakariya University, Multan

*     Corresponding author: drabdulwaheed@bzu.edu.pk

ABSTRACT

The data on 14 morphological trait measurements were obtained from 291 indigenous sheep found in the southern Punjab of Pakistan. Ten various body indices were obtained from 14 morphological traits. Pearson correlations between live body weight and 13 other morphological traits obtained to analyze the nature and strength of the relationship. Simple regression models were fitted to predict live body weight from 13 other morphological traits as independent variables. Descriptive statistics of body indices and morphological traits were also reported. The variation pattern was observed by coefficient of variation in both body indices and morphological traits. In body indices less variation was observed in BeronCrevit index, having a smallest coefficient variation of 8.50% and high variation in Area Index having largest coefficient of variation 23.98%. Similarly, in morphological traits less variation was observed in ear length, which had the smallest coefficient variation of 3.3%. The high variation pattern was observed in head width and percent weight, having the two largest coefficients of variations being 28.5% and 28.2%, respectively. As there was high Pearson correlation between live weight and barrel depth, the best regression model was on barrel depth with a high R2 of 0.938. The simple regression analysis shows that barrel depth is best predictor of live body weight.
 

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Pakistan Journal of Zoology

October

Vol. 54, Iss. 5, Pages 2003-2500

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