scholarly journals Estimation of Metabolizable Energy Requirements for Maintenance and Energetic Efficiency of Weight Gain in Bos taurus and Bos indicus Cows in Tropical Mexico

2010 ◽  
Vol 9 (2) ◽  
pp. 421-428 ◽  
Author(s):  
Jose Valentin Cardenas-M ◽  
Juan Carlos Ku-Vera ◽  
Juan Gabriel Magana-Mon
Keyword(s):  
Weight Gain ◽  
Bos Taurus ◽  
Bos Indicus ◽  
Metabolizable Energy ◽  
Energy Requirements ◽  
Energetic Efficiency

scholarly journals Energetic efficiency of protein and body fat retention in crossbred Bos indicus and Bos Taurus × Bos indicus raised under tropical conditions

2009 ◽  
Vol 38 (8) ◽  
pp. 1581-1586
Author(s):  
Douglas Sampaio Henrique ◽  
César de Queiroz ◽  
Ricardo Augusto Mendonça Vieira ◽  
Mosar Faria Botelho
Keyword(s):  
Body Fat ◽  
Correction Factor ◽  
Bos Taurus ◽  
Bos Indicus ◽  
Metabolizable Energy ◽  
Energetic Efficiency ◽  
Energy Fraction ◽  
Protein Retention ◽  
Tropical Conditions ◽  
Partial Body

The efficiency of fat and protein retention by Bos indicus and its cross-breds was estimated from data obtained in the literature to verify possible differences between these animals and Bos taurus. After estimating the efficiencies, a correction factor was used to discount the metabolizable energy fraction that was spent in the maintenance and support metabolism processes. The efficiencies were then estimated again, assuming that all the remaining energy would correspond to the metabolizable energy available for body mass retention. The correction value used was considered satisfactory to discount energetic losses for maintenance and support. The efficiency values of partial body fat and protein retention in Bos indicus and its cross-bred were very similar to values reported by other authors who researched Bos taurus exclusively.

An equation, suitable for computer use, based on the ARC feeding system to determine the energy requirements of growing and fattening cattle

1972 ◽  
Vol 14 (1) ◽  
pp. 17-23 ◽  
Author(s):  
C. A. Zulberti ◽  
J. T. Reid
Keyword(s):  
Weight Gain ◽  
Computer Use ◽  
Agricultural Research ◽  
Energy Requirement ◽  
Metabolizable Energy ◽  
Energy Requirements ◽  
Energy Concentration ◽  
Feeding System ◽  
Agricultural Research Council ◽  
Forward Calculation

SUMMARYBased on the Agricultural Research Council's feeding system, equations were developed that allow the calculation of the metabolizable energy requirements for maintenance and weight gain by cattle, separately or combined. A general equation was developed for the straight-forward calculation of the total metabolizable energy requirements of growing and fattening cattle for any combination of body weight, rate of weight gain, age, level of muscular work, and metabolizable energy concentration of the diet. The estimates of energy requirement made by the use of this equation are in excellent agreement with those made by the Agricultural Research Council using an iterative method.In addition to avoiding the awkward iterative process, the equations proposed are readily adaptable to computer use.

scholarly journals Estimación del gasto energético de los caprinos en la Península de Santa Elena

2018 ◽  
Vol 5 (1) ◽  
pp. 70-76
Author(s):  
Debbye Chávez ◽  
Julio Villacres Matías
Keyword(s):  
Weight Gain ◽  
Energy Expenditure ◽  
Metabolizable Energy ◽  
Descriptive Statistics ◽  
Energy Requirements ◽  
Maintenance Energy ◽  
Knowing That ◽  
Good Production ◽  
Santa Elena ◽  
The Way

El presente estudio guarda estrecha relación con la alimentación de caprinos, las ganancias de peso y su producción; sabiendo que, para que un animal logre buenos rendimientos productivos se hace necesaria una alimentación que cubra necesidades energéticas de mantenimiento, luego de crecimiento y ganancia de peso o de producción; se determinó el recorrido en unidades de desplazamiento; luego, por medio de fórmulas de medición energética trasformar esto a energía metabolizable que es una unidad fácilmente relacionable con las necesidades energéticas de mantenimiento y de producción, siendo 60 cabras de diferentes razas las que se consideraron en este estudio, donde se registró su peso, y edad antes de que formen parte del ensayo. Con la ayuda de podómetros calibrados para usarlos en cabras, se determinó el recorrido habitual. Los podómetros fueron colocados en uno de sus miembros posteriores a la altura de la rodilla, y retirados 24h después, registrando su desplazamiento y actividades en busca del alimento. Utilizando Excel se procedió a la tabulación y organización de los datos, que fueron sometidos a estadística descriptiva y análisis de la información, como resultado se evidenció 5Km de recorridos por animal, con edades entre 2,5 años de promedios, de igual forma las razas de cabras más frecuentes fueron, en primer lugar la Criolla y en segundo la Nubia; ambas razas de animales no se diferenciaron en el recorrido y peso, lo que permitió utilizar una forma universal de estimación del gasto energético (0,49 kcal/kg /km) pudiéndose determinar que fueron 87,69Kcal involucradas en 24h de actividad. ABSTRACT This study is closely related to feeding goats, weight gain and production; knowing that, for an animal to achieve good production yields a feed that covers maintenance energy requirements is necessary , after growth and weight gain or production a route was determined in units of displacement; then by using formulas of energetic measurement transform these to metabolizable energy which is a easily relatable unit with the energetic requirements of maintenance and production, 60 goats from different races were considered in this study, in which their weight and ages were recorded before forming part of the test. With the help of pedometers calibrated for use in goats, the usual route is determined. Pedometers were placed in one of his post-kneemembers, and retired after 24h, recording their movement and activities in search of food. Using Excel proceeded to the tabulation and organization of data, which were subjected to descriptive statistics and analysis of information, as a result of tours 5Km animal showed, aged 2.5 years average, similarly races more frequent goats were first Creole and secondly the Nubia; both breeds of animals did not differ in the way and weight, enabling use a universal way to estimate energy expenditure (0.49 kcal / kg / km) being able to determine which were involved in 24h 87,69Kcal activity.

PSIV-2 Evaluation of Relationship Between Feed Efficiency Traits and Energy Metabolism Using Comparative Slaughter Studies in Growing and Finishing Cattle

2021 ◽  
Vol 99 (Supplement_1) ◽  
pp. 214-215
Author(s):  
Phillip A Lancaster
Keyword(s):  
Linear Regression ◽  
Heat Production ◽  
Feed Efficiency ◽  
Metabolizable Energy ◽  
Energy Requirements ◽  
Energetic Efficiency ◽  
Maintenance Energy ◽  
Strongly Correlated ◽  
Body Protein ◽  
Comparative Slaughter

Abstract There is uncertainty whether feed efficiency traits are related to energetic efficiency. The objective of this study was to utilize comparative slaughter data to evaluate the relationships of feed efficiency traits with maintenance energy requirements (MEm) and efficiency of metabolizable energy (ME) use for maintenance (km) and gain (kg). Published data were compiled (31 studies, 214 treatment means) on metabolizable energy intake (MEI) and composition of empty body gain in growing cattle. Data analyses were performed using R statistical software considering each treatment mean as an independent experimental unit. Assuming fasting heat production (FHP) varies only due to empty body protein (EBP) composition, it was computed as 295 kcal/kg EBP.75. MEm, km, and kg were computed from the nonlinear relationship between heat production and MEI. Residual intake (lower is more efficient) was computed as the residual from linear regression of MEI on EBW and EBW gain (RMEI) or MEI on EBP, retained energy as protein and retained energy as fat (RMEIc). Residual gain (higher is more efficient) was computed as the residual from linear regression of EBW gain on EBW and MEI (REBG) or retained energy on EBP and MEI (RRE). MEI was positively correlated with RMEI (0.46) and RMEIc (0.44), and EBW gain was correlated with REBG (0.58) and RRE (0.39). FHP was correlated with RMEIc (-0.25). MEm was weakly correlated with RMEI (0.19), RMEIc (0.22), and REBG (-0.26), but strongly correlated with RRE (-0.51). km was moderately correlated with RMEI (-0.35), but strongly correlated with REBG (0.49), RMEIc (-0.59), and RRE (0.79). kg was strongly correlated with RMEI (-0.69), REBG (0.47), RMEIc (-0.89), and RRE (0.70). Correlations among feed efficiency traits were strong (>±0.48). In conclusion, feed efficiency traits using retained energy as the dependent variable had stronger correlations with maintenance energy requirements than those using feed intake as the dependent variable.

ENERGY UTILIZATION BY THE LACOMBE AND YORKSHIRE BREEDS OF PIG

1971 ◽  
Vol 51 (3) ◽  
pp. 761-770 ◽  
Author(s):  
V. D. SHARMA ◽  
L. G. YOUNG ◽  
G. C. SMITH
Keyword(s):  
Metabolizable Energy ◽  
Energy Utilization ◽  
Energy Requirements ◽  
Coefficient Of Determination ◽  
Energetic Efficiency ◽  
Net Energy ◽  
Reference Base ◽  
Diet Formulation ◽  
Yorkshire Pigs ◽  
Energy Equilibrium

A comparative slaughter trial involving 32 weanling pigs was conducted to estimate the energy requirements for maintenance and production and to compare the energetic efficiency of Lacombe and Yorkshire pigs. The coefficients of digestible energy (DE), metabolizable energy (ME), and ME/DE ratio were similar for the two breeds. The fasting heat production and energy requirements for maintenance of energy equilibrium for the Yorkshire pigs were significantly higher (P < 0.01) than for the Lacombe pigs. Differences in the efficiency of utilization of ME for the function of maintenance and for production were not significant. Estimates of net energy for maintenance and net energy for gain of the corn-soybean meal diet are presented. The study suggests that these net energy values, like the DE and ME values, may be used for diet formulation without need for correction for breed. The use of the exponent 0.56 rather than 0.75 as the reference base of metabolic body size led to increased precision, as indicated by higher estimates of the coefficient of determination.

Thermosensitivity of Bos indicus cattle and their F1, crosses with three breeds of Bos taurus

1991 ◽  
Vol 52 (1) ◽  
pp. 57-65 ◽  
Author(s):  
Khub Singh ◽  
N. K. Bhattacharyya
Keyword(s):  
Ambient Temperature ◽  
Rectal Temperature ◽  
Heat Production ◽  
Bos Taurus ◽  
Bos Indicus ◽  
Metabolizable Energy ◽  
Ambient Temperatures ◽  
Brown Swiss ◽  
Genetic Groups ◽  
Holstein Friesian

ABSTRACTResting heat production (H), respiratory rate (RR) and rectal temperature (Tr) were measured at different controlled temperatures (Tt) in Hariana (Bos indicus) and its F, crosses with Jersey (JH), Brown Swiss (BH) and Holstein Friesian (FH) (Bos taurus) breeds and the values obtained were used to assess their relative thermosensitivity.The lowest Tt at which H significantly decreased from that at 17°c was 32°c for Hariana, JH and BH and 27°c for FH after exposure for 8 days. The corresponding values after exposure for 18 days were 37°c for Hariana and 32°c for all the three crossbred groups. Differences between the genetic groups were also significant. The lowest Tt at which metabolizable energy (ME) decreased significantly in comparison with those at 17CC was 32°c in all the genetic groups. The differences in ME intake between genetic groups were significant only at 32°c Tt. The lowest Tt at which RR significantly increased from those at 17°c were 32°c in Hariana, 27°c in JH, BH and FH for both 5 to 7 and 15 to 17 days of exposure. The corresponding Tt for increase in Tr was 37°c in Hariana, 32°c in JH and 27°c in BH and FH at both 5 to 7 and 15 to 17 days of exposure.The ambient temperature at which H would have significantly decreased and RR and Tr increased from the respective values at 17CC Tt were calculated curvilinearly for different genetic groups. There were differences in these values of calculated ambient temperatures between genetic groups and between exposure durations in respect of H, RR, and Tr, indicating differences in thermosensitivity.

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