Using carcass information as a predictor variable of empty body weight, empty body weight gain and retained energy of hair sheep

Brito Neto, Antonio de Sousa; Herbster, Caio Julio Lima; Marcondes, Marcos Inacio; Chagas, Juana Catarina Cariri; Oliveira, Ronaldo Lopes; Bezerra, Leilson Rocha; da Silva, Luciano Pinheiro; Pereira, Elzania Sales

doi:10.1017/S0021859624000455

Forskningsartikel2024Vetenskapligt granskadÖppen tillgång

Using carcass information as a predictor variable of empty body weight, empty body weight gain and retained energy of hair sheep

Brito Neto, Antonio de Sousa; Herbster, Caio Julio Lima; Marcondes, Marcos Inacio; Chagas, Juana Catarina Cariri; Oliveira, Ronaldo Lopes; Bezerra, Leilson Rocha; da Silva, Luciano Pinheiro; Pereira, Elzania Sales

Sammanfattning

The objective was to develop equations to predict carcass weight (CW), use CW to predict empty body weight (EBW); and carcass gain (CG) to predict empty body weight gain (EBWG) and retained energy (RE) in hair sheep. To generate the prediction models, a data set was composed of individual measurements from 569 sheep encompassing intact males (n = 416), castrated males (n = 51), and females (n = 102). Validation analyses were performed by using the Model Evaluation System (MES). The prediction equations for CW, EBW, and EBWG were not influenced by sex class (P > 0.05), and the following equations were generated, respectively: CW (kg) = - 0.234 (+/- 1.1358) + 0.485 (+/- 0.0387) x FBW; EBW (kg) = 1.367 (+/- 0.5472) + 1.681 (+/- 0.0210) x CW and EBWG (kg) = 0.004 (+/- 0.0026) + 1.679 (+/- 0.0758) x CG. There was an effect of sex class on the intercept (P = 0.0013) of the relationship between RE and CG: RE (MJ/day) = 1.448 (+/- 0.0657) x EBW 0.75 x CG (0.797) ((+/- 0.0399)); RE (MJ/day) = 1.522 (+/- 0.0699) x EBW (0.75) x CG (0.797) ((+/- 0.0399)) and RE (MJ/day) = 1.827 (+/- 0.0739) x EBW (0.75 )x CG (0.797) ((+/- 0.0399)) for intact males, castrated males and females, respectively. This study highlights the importance of incorporating carcass information into EBW, EBWG, and RE predictions. Replacing empty body weight gain with carcass gain might be a suitable alternative to estimate the retained energy of hair sheep. In addition, the generated equations will provide support for meat production systems in carcass weight prediction.

Nyckelord

Carcass gain; energy; meta-analysis; prediction model; sheep

Publicerad i

Journal of Agricultural Science
2024, volym: 162, nummer: 4

SLU författare

Chagas, Juana
- Institutionen för tillämpad husdjursvetenskap och välfärd, Sveriges lantbruksuniversitet

UKÄ forskningsämne

Husdjursvetenskap

Publikationens identifierare

DOI: https://doi.org/10.1017/S0021859624000455

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/140087