&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 4 publications

(1 citation statement)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…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.

View full text Add to dashboard Cite

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.

show abstract

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.

View full text Add to dashboard Cite

show abstract

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

View full text Add to dashboard Cite

Predicting Chemical Body Composition Using Body Part Composition in Boer × Saanen Goats

Teixeira,

Ferreira,

Pereira Filho

et al. 2024

Ruminants

View full text Add to dashboard Cite

Two experiments were conducted to determine which part of the empty body of Boer × Saanen intact male kids can be used to predict the chemical composition of the whole body. In the first experiment, kids were fed ad libitum and slaughtered at 5, 10, and 15 kg body weight (BW). Eighteen animals were group-fed at three intake levels (ad libitum or restricted to 30% and 60% of the ad libitum level). When the ad libitum animal in the group reached 15 kg BW, all animals in the group were slaughtered. In the second experiment, kids were fed ad libitum and slaughtered at 15, 20, and 25 kg BW. Twenty-one animals were group-fed at three intake levels and slaughtered when the ad libitum animal within the group reached 25 kg BW. Analyzed body parts included head + feet, hide, organs, neck, shoulder, ribs, loin, leg, 9–11th ribs, and half carcass. Principal component and cluster analyses showed that the neck, 9–11th ribs, and loin had the highest frequency of grouping with the empty body. These body parts were used to develop prediction models for estimating body composition. The neck, loin, and 9–11th ribs accurately and precisely predicted the dry matter, ash, fat, protein, and energy body composition of goats, with most models also incorporating BW as a predictor variable. The equations showed root mean squared error (RMSE) lower than 13.5% and a concordance correlation coefficient (CCC) greater than 0.84. Fat and protein concentrations in the loin and neck were also reliable predictors of empty body energy composition (RMSE = 2.9% of mean and concordance correlation coefficient = 0.93). Removing the loin and 9–11th ribs could reduce the carcass retail price. Using the neck to estimate body composition in growing Boer × Saanen goats provides a valuable alternative for nutrition studies, given its low commercial value.

show abstract

<b>Methods of body composition estimative of growing goats

Cited by 4 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

Predicting Chemical Body Composition Using Body Part Composition in Boer × Saanen Goats

Contact Info

Product

Resources

About