Abstract
Study was conducted to estimate the live weight in Ongole crossbred cow using chest girth, body length and body volume model represented by chest girth and body length dimensions in North Sulawesi province. Data on animal live weight (LW), body length (BL), chest girth (CG) and body volume were collected from cows (n=363) kept by traditional household farmers. Animal body volume was calculated using cylinder volume formula with CG and BL as the components of model. Regression analysis was carried out for LW with all linear body measurements. Data were classified based on age of animals which resulted from five age groups (2.5-3.5, 3.6-4.5, 4.6-5.5, 5.6-6.5, 6.6-7.5, 2.5-7.5). Age significantly (P<0.05) influenced all body measurements. Correlations between all pairs of measurements were highly significant (P<0.001) for all age groups, except between BL and CG as well as LW at ages of 3.5 to 7.5 years old. Regression analysis showed that live weight could be predicted accurately from body volume (R2=0.96). Simple regression model being recommended to predict live weight of Ongole crossbred cows based on body volume with their age groups ranging from 2.5 to ≥7.5 years old is as follows: Live weight (kg) = 1.26016 * body volume (liters) - 3.06084. Key words: Ongole crossbred cows, live weight estimation, body linear measurements.
Highlights
Most of the Ongole crossbred cattle in rural areas of Indonesia were owned by rural households farmers.Often, the marketing of animals was based on visual assesment, while drugs were administrated mostly by estimation based on visual body.size
Positive correlation between the live weight and most of the body measurements was found in several research reports (Afolayan et al, 2006; Bene et al, 2007; Ozkaya and Bozkurt, 2009; Sawanon et al, 2011; Udeh et al, 2011)
Several scientific reports suggested that body measurements have been of recurring interest in beef cattle and small ruminant selection and breeding programs (Bene et al, 2007; Fajemilehin and Salako, 2008; Jimmy et al, 2010)
Summary
Most of the Ongole crossbred cattle in rural areas of Indonesia were owned by rural households farmers.Often, the marketing of animals was based on visual assesment, while drugs were administrated mostly by estimation based on visual body.size. Positive correlation between the live weight and most of the body measurements was found in several research reports (Afolayan et al, 2006; Bene et al, 2007; Ozkaya and Bozkurt, 2009; Sawanon et al., 2011; Udeh et al, 2011). This fact repeatedly point out the importance of taking body measurement and offers opportunity for estimating parameters in relation to the various body measurements. Body weight of animals is an important factor associated with
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