Live weight effect on the prediction of tissue composition in suckling lamb carcasses using the European Union scale

Autor: S. Velasco, C. Pérez, Sara Lauzurica, Eugenio Miguel, Vicente Cañeque, B. Blázquez, F. Ruiz de Huidobro
Rok vydání: 2007
Předmět:
Zdroj: Repositorio de Resultados de Investigación del INIA
Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria INIA
INIA: Repositorio de Resultados de Investigación del INIA
ISSN: 0921-4488
Popis: Forty-eight Manchega breed suckling lambs were slaughtered at 10, 12 and 14 kg live weight. Carcass degree of fatness was assessed by three assessors on carcass colour photographs, using the European Union scale for light lambs (EU) subdivided into 0.25-point intervals. Left half-carcasses were jointed and dissected into lean, fat and bone. Muscle percentage, bone percentage and whole fat percentage (obtained by addition of every fat depot subcutaneous fat, intermuscular fat, inguinal fat and kidney knob and channel fat) were determined. Ten kilograms group showed a higher number of variates significantly correlated to assessors' fatness scoring than 12 and 14 kg groups; no statistically significant regression was seen in 14 kg group. Results suggest that, as live weight increases, the utility of this method to predict carcass and joints tissue composition in suckling lamb carcasses decreases. EU scale associated with weight variates can really improve prediction of carcass composition. It would be interesting to extend this study in order to determine a similar effect on the prediction of heavier groups of carcasses. © 2005 Elsevier B.V. All rights reserved.
Databáze: OpenAIRE
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