&lt;b&gt;Methods of body composition estimative of growing goats

Resende, Kléber Tomás de; Fernandes, M. H. M. R.; Hentz, Fernanda; Teixeira, Izabelle Auxiliadora Molina de Almeida; Garcia, José Américo Soares

doi:10.4025/actascianimsci.v39i2.33215

Cited by 3 publications

(1 citation statement)

References 10 publications

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“…Like others, the deuterium dilution technique to determine body composition hopes to avoid the use of comparative slaughter and its implications (RESENDE et al, 2017;FONSECA et al, 2017), at the same time that considers the importance of accuracy in estimating body composition. Thus, a study was carried out to compare the estimates of energy and protein requirements obtained by using the deuterium oxide technique with data from the literature obtained by other techniques.…”

Section: Introductionmentioning

confidence: 99%

Energy and protein requirements for Nellore steers estimated with the deuterium oxide marker

Aferri¹,

Corte²,

Pereira³

et al. 2020

Bol. Ind. Anim.

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The aim of this study was determine the energy and protein requirements for maintenance and gain of Nellore steers. Thirty six Nellore steers with a average weight and age of 359±13 kg and 20 months at the beginning of the trial were individually fed for 56. The steers were fed the same diet (76.43% TDN and 13.62% CP) in three levels of dry matter (DM) intake, ad libitum, 75 g DM/kg BW0.75 and 60 g DM/kg BW0.75. The initial and final body composition was estimated with the marker deuterium oxide that allowed repeated water estimate in the same animal. Deuterium in blood samples was analyzed by mass spectrometry. The effects of intake levels, comparison of intercept and slope among feeding level, and equations were evaluated by the analysis of variance, adopting P<0.05 as a significant level. The net energy for maintenance was 75 kcal/kg EBW0.75 or 70 kcal/kg BW0.75. The net energy for gain for steers with 350 to 450 kg weight was 5.1 to 6.1Mcal. The efficiency of energy utilization for maintenance, km, was 0.7492 and for weight gain, kg, was 0.3404. The metabolizable protein requirement for maintenance was 4.32 * BW0.75 and the net protein for gain was estimated with the equation NPg = (254.68*EBWG) €“ (29.38*RE). The technique of deuterium oxide marker used to estimate energy and protein requirement for maintenance and weight gain at Nellore steers confirm the hypothesis presented in NRC, that NEm is lower than the requirement for taurine cattle. On the other hand, the reverse was true for the NP requirement for maintenance and for weight gain. We consider that indirect method using D2O for estimate body composition in zebu cattle was suitable to determine nutrient requirements.

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Section: Introductionmentioning

confidence: 99%

Energy and protein requirements for Nellore steers estimated with the deuterium oxide marker

Aferri¹,

Corte²,

Pereira³

et al. 2020

Bol. Ind. Anim.

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Predicting the chemical composition of the body and the carcass of hair sheep using body parts and carcass measurements

Barcelos¹,

Vargas²,

Mezzomo³

et al. 2021

Animal

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Carcass and meat traits of goats fed diets containing cottonseed cake

et al. 2021

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Abstract. The cottonseed cake has the necessary nutritional characteristics to be able to substitute the traditional ingredients (such as soybean meal) and reduce the costs of the diet. However, it is necessary to determine the best level of inclusion of cottonseed cake in the diets of fattening goats to improve meat production and quality. The objective of this study was to evaluate carcass and meat traits of feedlot goats fed diets containing cottonseed cake replacing soybean meal (33 %, 66 % and 100 %). Thirty-two uncastrated Boer crossbred goats (4 months old, 16 ± 2 kg initial body weight) were used in a completely randomized experimental design. Replacing soybean meal with cottonseed did not compromise (P> 0.05) slaughter weight, carcass traits (dressing percentage, loin-eye area and back-fat thickness), primal cuts or carcass morphometric measurements; moisture, protein, or total lipid contents of meat; or the physicochemical traits of color (L*, a* and b* coordinates), pH, shear force, and cooking loss. However, there was a reduction (P=0.001) in the mineral matter content (from 1.08 % to 0.97 %) and an increase (P=0.006) in the cholesterol content (from 50.85 to 70.55 mg/100 g of meat) of the meat as the dietary levels of cottonseed cake were increased. Based on the results of production and meat quality, we recommend using cottonseed cake as an alternative protein source to replace up to 100 % of soybean meal in feedlot goat diets.

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<b>Methods of body composition estimative of growing goats

Cited by 3 publications

References 10 publications

Energy and protein requirements for Nellore steers estimated with the deuterium oxide marker

Energy and protein requirements for Nellore steers estimated with the deuterium oxide marker

Predicting the chemical composition of the body and the carcass of hair sheep using body parts and carcass measurements

Carcass and meat traits of goats fed diets containing cottonseed cake

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