Elucidating the impact of feeding behaviour on body composition in finishing pigs fed ad libitum using an integrative feeding behaviour index

Large variability in body composition is observed pigs fed and raised similar conditions. Part of this variation might be explained by the feeding behaviour pigs, given its effect on metabolic hormones associated with energy regulation protein metabolism. The objective study was to elucidate relationship examining a new index describing finishing pigs. Feeding information 138 during last 28 d phase from three trials were used. For each pig, sum areas between relative cumulative feed intake regression line for evolution over time used calculate index. This quantifies irregularity (IIFI) integrating different components into single measurement. Body lipids estimated dual X-ray densitometry at beginning (day 1) end 28). IIFI performance variables examined using correlation tests factor analysis within dataset. In datasets where correlated composition, linear models quantify contribution total composition. Weak moderate correlations (r = ±0.31 ±0.44; P < 0.05) found only 1 2. However, dataset 2, also daily - 0.54; 0.001). Irregular increased proportion (PdDG) decreased (LdDG) gain. accounted 8% 14% 10% 12% PdDG LdDG 2 1, respectively. Additionally, showed that number meals had high loadings separate factors or performance, suggesting are independent behaviour. conclusion, other than involved modulating ad libitum.