Utilize este identificador para referenciar este registo: http://hdl.handle.net/10198/7691
Título: Impact of measurement errors on alternative predictors of lean meat proportion of lamb carcasses
Autor: Cadavez, Vasco
Palavras-chave: Carcass
Measurement errors
Prediction
Lean meat
Data: 2010
Citação: Cadavez, Vasco (2010) - Impact of measurement errors on alternative predictors of lean meat proportion of lamb carcasses. In 9th International Symposium of Animal Biology and Nutrition. Bucharest
Resumo: The objectives of this study were to evaluate the impact of measurement errors on alternative predictors of lean meat proportion (LMP) of lamb carcasses. Ninety eight lambs (72 males and 26 females) of Churra Galega Bragançana breed were slaughtered, and carcasses were weighed (HCW) approximately 30 min after exsanguination. During carcasses quartering a caliper was used to perform tissue depth measurements, over the maximum depth of longissimus muscle (LM), between the 12th and 13th ribs (C12 ), and between the 3rd and 4th lumbar vertebrae (C3). The C12 and C3 measurements were contaminated with simulated measurement errors, and three distributions for random error were simulated: 1} random error with mean 0 and variance of 0.25 mm (E ~ N(0,0.25mm), 2) random error with mean 0 and variance of 0.50 mm (E ~ N(0,0.50mm)), and 3) random error with mean 0 and variance of 0.75 mm (E ~ N(0,0.75mm)). Simple and multiple linear regression models were developed using as independent variables the measured (original) and the biased C12 and C3 measurements as predictors of LMP. The coefficient of determination and the residual standard deviation were computed. This work shows that measurement errors of subcutaneous fat can have a high impact on the stability of models to predict the carcasses LMP. The subcutaneous fat measurements of higher magnitude are less sensitive to measurement errors, and give rise to more stable prediction models.
Peer review: yes
URI: http://hdl.handle.net/10198/7691
Aparece nas colecções:CA - Resumos em Proceedings Não Indexados ao ISI/Scopus

Ficheiros deste registo:
Ficheiro Descrição TamanhoFormato 
2010CadavezImpact.pdf391,07 kBAdobe PDFVer/Abrir


FacebookTwitterDeliciousLinkedInDiggGoogle BookmarksMySpace
Formato BibTex MendeleyEndnote Degois 

Todos os registos no repositório estão protegidos por leis de copyright, com todos os direitos reservados.