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Title: Using path analysis to predict bodyweight from body measurements of goats and sheep of communal rangelands in Botswana
Contributor(s): Temoso, Omphile (author)orcid ; Coleman, Michael  (author)orcid ; Baker, Derek  (author)orcid ; Morley, Philip  (author); Baleseng, Leonard (author); Makgekgenene, Alec (author); Bahta, Sirak (author)
Publication Date: 2017
Open Access: Yes
DOI: 10.4314/sajas.v47i6.13Open Access Link
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Abstract: The objective of this study was to determine the practicality of using linear body measurement traits to predict live weight of goats and sheep under communal grazing in three districts of Botswana, namely Central, Kweneng, and Kgalagadi. Pairwise (Pearson) correlations were estimated using bodyweight (BW) and morphological trait measurements, namely heart girth (HG), shoulder height (SH), and body condition score (BCS) for a sample of 1447 goats and 588 sheep. These ranged from 0.19 to 0.94 for goats and 0.44 to 0.94 for sheep, and were statistically significant. In both animals, regardless of sex, the highest positive correlations were found between BW and HG, followed by BW and SH, then BW and BCS. The direct and indirect relationship between BW and morphological traits using a path analysis approach were also estimated. This analysis suggested that the direct effect of HG on BW was higher at 0.761 for male and 0.662 for female goats, respectively. Similarly, the direct effect of HG on BW was higher among sheep at 0.764 for males and 0.882 for females. The direct effects of SH in all the animals were also positively influenced by BW. It was concluded that among these three morphological traits, the most valuable for estimating the BW for goats and sheep in Botswana is HG, followed by SH. BCS was found non-significant. Path analysis therefore has an advantage over previous empirical studies by providing more detailed information on the relationships (direct and indirect) between these variables. A further implication of this study is that a conversion table could be constructed to help smallholder farmers to estimate the live weight of their sheep and goats from linear measurements. This would aid in the management and marketing of their livestock.
Publication Type: Journal Article
Source of Publication: South African Journal of Animal Science, 47(6), p. 854-863
Publisher: South African Society for Animal Science
Place of Publication: South Africa
ISSN: 2221-4062
Fields of Research (FoR) 2008: 140201 Agricultural Economics
070299 Animal Production not elsewhere classified
070203 Animal Management
Fields of Research (FoR) 2020: 300302 Animal management
440407 Socio-economic development
380101 Agricultural economics
Socio-Economic Objective (SEO) 2008: 839999 Animal Production and Animal Primary Products not elsewhere classified
Socio-Economic Objective (SEO) 2020: 100412 Sheep for meat
280101 Expanding knowledge in the agricultural, food and veterinary sciences
280108 Expanding knowledge in economics
Peer Reviewed: Yes
HERDC Category Description: C1 Refereed Article in a Scholarly Journal
Appears in Collections:Journal Article
School of Environmental and Rural Science
UNE Business School

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