Evaluacion de Mediciones Fisicas y de Ultrasonido para Estimaciones del Peso de la Pechuga
AUTOR(ES)
Melo, JE, Castillo, JL, Mallo, G, Ciacciariello, M, Canet, Z, Miquel, MC
FONTE
Revista Brasileira de Ciência Avícola
DATA DE PUBLICAÇÃO
2001-01
RESUMO
The objective of this study was the evaluation of the use of different measures as predictors of breast weight. Thirty-two Anak chicks and 32 Ross chicks were used for the experiment 1. They were randomly sampled from two populations of 400 broilers of each genotype. A slaughter followed by dissection of commercial cuts was done at 53 days old. The following weights were recorded: live weight (PV), eviscerated carcass (PC), and breast (Pch). Proportions to live weight were also used (%PC, %Pch). Breast height and length were measured with calipers previously to the slaughter. Differences between genotypes were found for PV, PC, %PC, Pch and %Pch (p< 0.05). The Ross broilers were heavier than the Anak ones, as theirs carcasses, breasts and proportions were higher. Pch was high correlated with PV, and the calipers measurements did not improve the prediction of Pch and %Pch. Sixty INTA-Campero broilers, randomly sampled from 100, were used for the experiment 2 up to 69 days old. At that age in vivo calipers measures were taken from the length and height of the breast, and ultrasound was used for depth of breast measure. The measured characters at slaughter were the same as those of the experiment 1. An appropriate prediction of Pch was obtained using PV, breast length and breast depth (R²=0,75). The elimination of the ultrasound measurement did not reduce the model fit in an important way (R²=0,725).
Documentos Relacionados
- Evaluación de la Estabilidad Atmosférica Bajo Condiciones Físicas y Meteorólogicas del Altiplano Ecuatoriano
- Evaluación de diferentes metodologías para la calibración de las estimaciones de precipitación cmorph sobre Sudamérica
- Un sistema de indicadores para el seguimiento y evaluación de la gestión sostenible del patrimonio cultural
- Relación entre el informe del cuidador sobre el habla espontánea del paciente y la Evaluación Breve de la Afasia
- La evaluación psicológica en contextos educativos: aciertos del pasado, errores del presente y propuestas de futuro