National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692 Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Data on a total of 215 crossbred Landly pigs was obtained for the years 2015-2018 to estimate body weight at 32 weeks of age from body weights at different ages viz. 4 weeks (w4), 9 weeks (w8) and 20 weeks (w20) of age. The data comprised of weights at weekly intervals till 8th week and after 8 weeks of age, weights recorded at the interval of 4 weeks till 32 weeks of age. Data was categorized into male (69) and female pigs (146) and was fed to a program in the Statistical Analysis Software, MATLAB 2019b.Analysis was conducted individually on the group of male pigs, female pigs as well as combined dataset using weight at 4 weeks, weaning weight and weight at 20 weeks of age to determine which can be best used for prediction. Gradient or difference in weight was calculated. This was further used to calculate the average growth rate and was fed to the formula devised to find the estimated weight at week 32. The estimated weights were used to calculate the average error and standard error to analyze the reliability of the estimation. Prediction from weight at week 20 produced the lowest standard error. In all the age groups females have shown better predictive ability than males. Results of estimation are similar both for pigs of week 4 age group and pigs of week 8 age group.
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