Developing equations for predicting internal body fat in Pelibuey sheep using ultrasound measurements

Prediction of Carcass Traits of Hair Sheep Lambs Using Body Measurements

“…A non-rejection of the null hypothesis means that the model accurately explained the variation that occurred in the dataset. The precision was assessed by the evaluation of the r 2 of the linear regression of Y (i.e., observed) on X (i.e., predicted) as described by Fonseca et al [20] and Morales-Martinez et al [4]. The mean bias (MB), as described by Cochran and Cox [21], was used as a representation of the average inaccuracy of the model.…”

“…Indirect methods include the prediction of carcass and body composition based on parameters easily obtained [1] through ultrasound [4][5][6], computed tomography, dual x-ray absorptiometry (DEXA), digital image analysis or body measurements [6][7][8][9]. Some of these methods, such as computerised tomography, magnetic resonance, and DEXA are limited to developed countries due to the cost of acquiring the necessary equipment and the need for specialised, professionally trained personnel; also, these methods can be time-consuming [3,[9][10][11].…”

“…On the other hand, direct methods involve the separation and dissection of an animal’s body and the determination of its physical and chemical components [ 1 , 2 ]. However, these latter methods are extremely laborious, time-consuming, and costly because of the large number of personnel and laboratory analyses required in addition to being wasteful, as half of the carcass is subsequently discarded [ 1 , 2 , 3 , 4 ].…”

Predicting body composition of hair-lambs based on body mass index

“…Consequently, the need for improved meat quality has resulted in a growing interest in accessing accurate data to calculate carcass and body chemical composition. This is essential for assessing nutritional requirements and physiological growth (Morales-Martínez et al, 2020), because weight gain and body composition are directly related (Herath et al, 2020). Body composition studies involve analyses and measures of body properties, such as size, surface area and density (Costa-Moreira et al, 2015).…”

“…Body composition studies involve analyses and measures of body properties, such as size, surface area and density (Costa-Moreira et al, 2015). The growing interest in body composition has led to the search for methods allowing to determine body composition of animals in vivo (Fonseca et al, 2017;Morales-Martínez et al, 2020). Since body mass gain occurs in a temporal sequence at different rates, it provides essential information to estimate changes in tissue body composition under different ABSTRACT.…”