Abstract
The objective of this study was evaluate whether Video Image Analysis methodology can replace the biometric measurements in loco, made in live hair sheep lambs, and predict carcass weight, commercial cuts weight and qualitative characteristics of carcass. Information was obtained from 92 male lambs from the Santa Inês genetic group and Dorper x Santa Inês crossbred. Nine biometrics measurements were made in loco in dorsal view and 15 in side view using hypometer and measuring tape, the same measurements were made in 184 images obtained from live hair sheep lambs using the ImageJ version 1.52k program. The database using images and database using measurements in loco were evaluated with algorithm Elastic net to select the best database. The VIA using dorsal view showed best results for prediction of carcass (R² - 0.96; 0.95 for hot and cold carcass respectively) and commercial cuts weight (R² - 0.70 - shoulder and leg; 0.85 for rib). The use of VIA to obtain biometric measurements can replace the traditional method and allows the prediction of carcass weights and commercial cuts weights through images of live animal, however, it was not efficient to predict characteristics as rib eye area and subcutaneous fat thickness.
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