Resumen

GONZALEZ-GARDUNO, Roberto; SALINAS-HERNANDEZ, Rosa Ma; GARDUZA-ARIAS, Gabriela  y  REYES-MONTES, Francisco. Body composition of slaughter hair sheep in the southeast of Mexico. Zootecnia Trop. [online]. 2014, vol.32, n.1, pp.23-32. ISSN 0798-7269.

The aim of this study was to estimate the rate and correlation of body components of hair sheep in a slaughterhouse in Tabasco, México. The information was recorded in 487 sheep from the states of Tabasco, Veracruz and Chiapas. Main components (carcass, head, skin, legs, liver, gastrointestinal tract and respiratory tract) were weighed during three years: 2004, 2009 and 2011. The weight and body composition percentage were analyzed using the GLM procedure of SAS. The males were heavier (33,6 ± 8,2 kg) than females (31,3 ± 6,4 kg) at slaughter, while carcass weight (17,1 kg), head (1,9 kg), legs (1,0 kg) and skin (3,4 kg) were higher in males than in females (14,6; 1,6; 0,8 and 2,7 kg, respectively). The gastrointestinal tract (git) had greater weight in females (7,3 kg) than in males (6,4 kg). The highest correlation coefficient between the components was between live weight and carcass weight (94%). Between the head weight and respiratory tract there was a high correlation coefficient (76-77%). The best-fit curves were linear and potential among components. Sheep for slaughter are males, females pregnant and females discarded, with great variability in live weight, carcass yield low and high percentage of gastrointestinal tract.

Palabras clave : Live weight; carcass yield; gastrointestinal tract; ewes; rams.

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