In Vivo Measurement of Body Parts and Fat Deposition in Rabbits by Mri.

Kövér, G; Szendrő, Z.; Romvári, Róbert; Jensen, Jan H.; Milisits, Gábor

doi:10.4995/wrs.1998.349

Cited by 6 publications

(3 citation statements)

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“…Most of the works only showed the R 2 values or CV (%). The R 2 of fat content (g) prediction in this study was higher (0.97) than the values shown by Köver et al [ 11 ], who found an r-value of 0.39 (R 2 = 0.15) using the MRI method. Fekete and Brown [ 12 ] used both TOBEC and the deuterium dioxide method to estimate empty body fat.…”

Section: Discussioncontrasting

confidence: 85%

“…The in vivo determination of carcass composition during the growing period could be interesting to study the variation in carcass composition with aging and to determine nutrient retention without slaughtering the animals. Some authors have estimated body composition using in vivo methods in rabbits such as Magnetic Resonance (MRI) [ 9 , 10 , 11 , 12 ], and the method of dilution with deuterium oxide (D2O) in rabbit does [ 13 , 14 ]. Milisits et al [ 14 ] also used the Total Body Electrical-Conductivity method (TOBEC) in growing rabbits.…”

Section: Introductionmentioning

confidence: 99%

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Application of Bioelectrical Impedance Analysis (BIA) to Assess Carcass Composition and Nutrient Retention in Rabbits from 25 to 77 Days of Age

Barrio¹,

García-Ruíz²,

Fuentes-Pila³

et al. 2022

Animals

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The aim of this study was to assess and validate, using independent data, the prediction equations obtained to estimate in vivo carcass composition using bioelectrical impedance analysis (BIA) to determine the nutrient retention and overall energy and nitrogen retention efficiencies of growing rabbits. Seventy-five rabbits grouped into five different ages (25, 35, 49, 63 and 77 days) were used in the study. A four-terminal body-composition analyzer was applied to obtain resistance (Rs, Ω) and reactance (Xc, Ω) values. All the animals were stunned and bled at each selected age, and the chilled carcasses were analyzed to determine water, fat, crude protein (CP), ash and gross energy (GE). Multiple linear regression analysis was conducted to determine the equations, using body weight, length and impedance data as independent variables. The coefficients of determination (R2) to estimate the content of water, protein, fat and ash in grams, and energy in Mega Jules(MJ), were: 0.99, 0.99, 0.95, 0.96 and 0.98, respectively, and the relative mean prediction errors (RMPE) were: 4.20, 5.48, 21.9, 9.10 and 6.77%, respectively. Carcass yield (%) estimation had values of 0.50 and 10.0 for R2 and RMPE, respectively. When water content was expressed as a percentage, the R2 and RMPE were 0.79 and 1.62%, respectively. When the protein, fat and ash were expressed as a percentage of dry matter (%DM) and the energy content as kJ/100 g DM, the R2 values were 0.68, 0.76, 0.66 and 0.82, respectively, and the RMPEs were 3.22, 10.5, 5.82 and 2.54%, respectively. Energy Retention Efficiency was 20.4 ± 7.29%, 21.0 ± 4.18% and 20.8 ± 2.79% from 35 to 49, from 49 to 63 and from 35 to 63 d, respectively. Nitrogen Retention Efficiency was 46.9 ± 11.7%, 34.5 ± 7.32% and 39.1 ± 3.23% for the same periods. Energy was retained in body tissues for growth with an efficiency of approximately 52.5%, and the energy efficiency for protein and fat retention was 33.3 and 69.9%, respectively. This work shows that BIA is a non-invasive and good method to estimate in vivo carcass composition and to determine the nutrient retention of growing rabbits from 25 to 77 days of age.

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Section: Discussioncontrasting

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Application of Bioelectrical Impedance Analysis (BIA) to Assess Carcass Composition and Nutrient Retention in Rabbits from 25 to 77 Days of Age

Barrio¹,

García-Ruíz²,

Fuentes-Pila³

et al. 2022

Animals

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“…KÖVER et al (1998) andPASCUAL et al (2000) also observed a lower precision in the prediction of low fat weight measurements attributed to their greater relative error. On the other hand, a slight underestimation of the PFW was still observed for the animals with more than 120 g of PFW, perhaps related to the diffuse nature of the perirenal fat depots, especially on high fat animals.…”

Section: Resultsmentioning

confidence: 99%

Ultrasound measurements of perirenal fat thickness to estimate the body condition of reproducing rabbit does in different physiological states.

Pascual¹,

Ornelas²,

Piquer³

et al. 2010

World rabbit sci.

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Sixty New-Zealand×Californian multiparous rabbit does were used to evaluate the capability of a computerized ultrasound system to estimate changes in body condition at different physiological states: parturition, 21 st day of lactation, weaning and 28 th day of gestation. Perirenal fat weight and carcass energy concentration were significantly correlated with live weight (r = 0.58 and 0.49, respectively; P<0.001) and ultrasound measurement of perirenal fat thickness (r = 0.51 and 0.45; P<0.001). The inclusion of quadratic and cubic terms of the perirenal fat thickness as independent variables significantly increased the coefficient of determination and lowered the residual standard deviation of the models, based on the live weight of the animals, to estimate the perirenal fat weight and the carcass energy concentration (P<0.01). However, these general models tended to overestimate the perirenal fat weight and the body energy concentration of lean animals (<50 g of perirenal fat weight or 8.0 MJ kg -1 of carcass energy concentration). When specific multiple regression equations for predicting perirenal fat weight and body energy of multiparous does were developed in function of their physiological state, prediction accuracy of equations improved for rabbits at parturition (R 2 = 0.72 and 0.67), 21 days of lactation (R 2 = 0.84 and 0.67) and weaning (R 2 = 0.76 and 0.65). No model was able to predict either perirenal fat weight or carcass energy concentration of the multiparous rabbit does at 28 th day of gestation. In conclusion, excluding animals in late gestation, ultrasound measurement of perirenal fat thickness seems to be a useful technique for in vivo estimation of the body condition of reproducing multiparous rabbit does.

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Assessing Rabbit Body and Carcass Traits with Non-invasive and Non-destructive Image Techniques

Silva,

Donkó

2024

Veterinary Care of Farm Rabbits

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In Vivo Measurement of Body Parts and Fat Deposition in Rabbits by Mri.

Cited by 6 publications

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Application of Bioelectrical Impedance Analysis (BIA) to Assess Carcass Composition and Nutrient Retention in Rabbits from 25 to 77 Days of Age

Application of Bioelectrical Impedance Analysis (BIA) to Assess Carcass Composition and Nutrient Retention in Rabbits from 25 to 77 Days of Age

Ultrasound measurements of perirenal fat thickness to estimate the body condition of reproducing rabbit does in different physiological states.

Assessing Rabbit Body and Carcass Traits with Non-invasive and Non-destructive Image Techniques

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