Relationship of empty body weight with shrunken body weight and carcass weights in adult Pelibuey ewes at different physiological states

Chay-Canul, Alfonso J.; Espinoza-Hernandez, J.; Ayala-Burgos, A. J.; Magaña-Monforte, Juan Gabriel; Aguilar-Pérez, Carlos Fernando; Chizzotti, Antônio; Tedeschi, L. O.; Kú-Vera, Juan Carlos

doi:10.1016/j.smallrumres.2013.11.019

Cited by 16 publications

(36 citation statements)

References 9 publications

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“…Nonetheless, to determine the EBW, sheep have to be slaughtered; for this reason, regression equations have been developed to estimate EBW from BW or SBW and include this information and thus contribute to updating with the data for estimation of some parameters required by nutritional models such as SRNS in order to predict the performance of hair sheep breeds (11,32) .…”

Section: Empty Body Weight (Ebw)mentioning

confidence: 99%

“…Sin embargo, para determinar el PCV, los animales tienen que ser sacrificados; por esta razón, han desarrollado ecuaciones de regresión para estimar PCV a partir del PC o PCE, e incluir esta información, y así contribuir a la actualización con los datos para la estimación de algunos parámetros requeridos por los modelos nutricionales como SRNS para predecir el desempeño de razas de ovejas de pelo (11,32) .…”

Section: Peso Corporal Vacío (Pcv)unclassified

“…Con respecto a las hembras, en ovejas Pelibuey adultas en diferentes estados fisiológicos, el peso del contenido gastrointestinal fue aproximadamente un 19 % de PCE (11) . Recientemente, (Chay-Canul, datos inéditos) utilizando datos de 28 ovejas Pelibuey adultas con diferentes pesos y condicion corporal, se conformó la siguiente ecuación:…”

Section: Peso Corporal Vacío (Pcv)unclassified

“…En este sentido (10) recientemente en ovejas Santa Inês se ha demostrado la importancia de la utilización de ecuaciones específicas a las condiciones locales para asegurar que se realicen predicciones precisas y confiables de consumo de materia seca. Además, algunos estudios han indicado que las razas ovinas de pelo tienen diferentes requerimientos de energía en comparación con las razas de lana, pero esta afirmación se ha basado en datos experimentales limitados (11) .…”

Section: Introductionunclassified

“…In this sense (10) recently demonstrated the importance of using specific equations to local conditions to ensure that accurate and reliable predictions of dry matter intake by Santa Inês sheep are made. Also, some studies have stated that hair sheep breeds have different energy requirements compared to wool breeds, but this assertion has been based on limited experimental data (11) .…”

Section: Introductionmentioning

confidence: 99%

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Requerimientos energéticos de ovinos de pelo en las regiones tropicales de Latinoamérica. Revisión

Chay-Canul¹,

Magaña-Monforte

Chizzotti

et al. 2016

Rev. Mex. Cienc. Pecu.

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RESUMENLos ovinos de pelo juegan un papel importante en la producción animal en las regiones tropicales; sin embargo, sus requerimientos nutricionales no se han determinado en la misma medida que los de las razas de lana. Debido a las condiciones ambientales de las regiones tropicales (clima, calidad y disponibilidad de alimentos), es razonable la hipótesis de que los requerimientos de energía metabolizable (EM) y la eficiencia de utilización de la EM pueden ser diferentes entre los ovinos de razas de pelo y de lana. La información disponible en ovinos de pelo muestra una gran discrepancia en cuanto a las necesidades de energía. Con base en datos de la literatura disponible para hembras ovinas, el requerimiento de EM para mantenimiento (EM m ) fue de 419±129 kJ/kg PC 0.75 (media ± desviación estándar) y para machos fue 388±123 kJ/kg BW 0.75 . El requerimiento de energía neta para la ganancia de peso (EN g ) varió de 8.75 a 14.06 kJ/g (11.63±1.86 kJ/g). Las eficiencias de utilización de la EM para el mantenimiento (k m ) y la ganancia de peso (k g ) fueron de 0.66±0.023 y 0.42±0.044, respectivamente. Esta revisión también indicó que la información es escasa para ovejas adultas en diferentes etapas fisiológicas (mantenimiento, lactancia y gestación). Se requiere más trabajo de investigación con relación a la estimación de las necesidades de energía de los ovinos de pelo, con el fin de hacer ajustes a los modelos existentes de alimentación, con el objetivo de predecir la respuesta de los animales con la condición que prevalece en los trópicos (tipo de animal, medio ambiente y alimentos disponibles).PALABRAS CLAVE: Ovinos de pelo, Requerimientos de energía, Trópicos, Mantenimiento, Ganancia, Eficiencia. ABSTRACTBreeds of hair sheep play an important role in animal production in tropical regions; however, their nutrient requirements have not been determined to the same extent as those of wool breeds. Due to the environmental conditions of the tropical regions (climate, quality and availability of feedstuffs), it is reasonable to hypothesize that energy requirements and efficiency of utilization of metabolizable energy (ME) may be different between hair and wool breeds of sheep. Information available on hair sheep shows a large discrepancy regarding energy requirements. Based on available literature data for female sheep, ME requirement for maintenance (ME m ) was 419±129 kJ/ kgBW 0.75 (mean ± standard deviation) and for the male 388±123 kJ/kg BW 0.75 . The requirement of net energy for gain (NE g ) ranged from 8.75 to 14.06 kJ/g (11.63±1.86 kJ/g). The efficiency of ME utilization for maintenance (k m ) and gain (k g ) were 0.66±0.02 and 0.42±0.04, respectively. This review indicated also that information is scarce for adult ewes at different physiological stages (maintenance, lactation, or pregnancy). More work is required regarding estimates of nutrient requirements of hair sheep in order to develop adjustments to existing nutrition models to predict animal's response under the conditions prevailing in the tropics (...

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Section: Empty Body Weight (Ebw)mentioning

confidence: 99%

Section: Peso Corporal Vacío (Pcv)unclassified

Section: Introductionunclassified

Section: Introductionmentioning

confidence: 99%

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Requerimientos energéticos de ovinos de pelo en las regiones tropicales de Latinoamérica. Revisión

Chay-Canul¹,

Magaña-Monforte

Chizzotti

et al. 2016

Rev. Mex. Cienc. Pecu.

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Energy and protein requirements of woolless sheep under tropical conditions

et al. 2020

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Predicting empty body weight in growing goats: A meta-analytic approach

Campos

Almeida

Biagioli

et al. 2017

Small Ruminant Research

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The objective of this study was to develop statistical models to predict empty body weight (EBW) by body weight (BW), testing the influence of sex (females, intact males or castrated males), type of diet (suckling or postweaning), and genotype (Saanen, ½ Boer × ½ Saanen, ¾ Boer × ¼ Saanen, and Indigenous goats). Individual records of 311 goats combined from 10 studies, with BW ranging from 4.3 to 47.4 kg were used. The EBW was computed as the BW at slaughter minus the weight of the contents of the digestive tract, urinary bladder, and biliary vesicle. Linear regression analyses were performed to develop the models, considering sex, type of diet, and genotype as fixed effects and random effect of study. CONTRAST statements were used to conduct all pairwise comparisons of fixed effects and all the statistical analyses were performed using SAS. The present study revealed that sex did not affect both intercept (P = 0.53) and slope (P = 0.19). On the other hand, the EBW prediction was affected by type of diet (P < 0.01), and genotype (P = 0.02). Therefore, were proposed different equations to predict EBW from BW for suckling and post-weaning Saanen goats, where gastrointestinal tract content (g/kg EBW) in suckling goat kids increased as they grew, oppositely it remained slightly constant in postweaning goats. The effect of genotype on the EBW:BW relationship was tested considering only post-weaning goats, and one equation was proposed for each genotype. In general, gastrointestinal tract content (g/kg EBW) decreased as goat kids grew in all genotypes but Indigenous goats. The results also highlighted different gastrointestinal relative capacity between genotypes. The development of these equations would enable producers and researchers to predict the animal EBW, and develop strategic plans in a goat herd.

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Relationship of empty body weight with shrunken body weight and carcass weights in adult Pelibuey ewes at different physiological states

Cited by 16 publications

References 9 publications

Requerimientos energéticos de ovinos de pelo en las regiones tropicales de Latinoamérica. Revisión

Requerimientos energéticos de ovinos de pelo en las regiones tropicales de Latinoamérica. Revisión

Energy and protein requirements of woolless sheep under tropical conditions

Predicting empty body weight in growing goats: A meta-analytic approach

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