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Descripción
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| In the last two decades, some authors have developed several in vivo methods to determine the whole body composition of doe rabbits. However, some of these techniques still have a low accuracy (deuterium oxide dilution (DOD) and near-infrared spectroscopy (NIR)) or need some preparation, as the ultrasound, which requires the shaving of the animal. Other methods used by medical teams for humans are very expensive and usually located in health centres, and consequently they are not very practical in spite of their higher precision (body electrical conductivity (TOBEC), computer tomography (CT) and magnetic resonance imaging tomography (MRI)). In recent years a procedure using the bioelectrical impedance analyser (BIA) has been utilized to predict the carcass composition of live lambs, steers and pigs (Swantek et al., 1992; Berg et al., 1999; Velazco et al., 1999). It has shown promise as an accurate method of predicting body composition, due mainly to the relatively inexpensive cost of the basic instrument, its ease of operation, and its portability. The ability of tissues, and therefore the whole body, to conduct an electric current has been recognized for more than hundred years. The aqueous tissues of the body, due to their dissolved electrolytes, are the major conductor of an electrical current, whereas body fat and bone have relatively poor conductance properties. Thus, a fat animal has a higher impedance value than a lean animal. The BIA measurements are performed using four electrodes. For the single-frequency measurement (50kHz), a weak alternating current is passed through the outer pair of electrodes, while the voltage drop across the body is measured using the inner pair of electrodes from which the body¿s impedance is derived. In the Animal Production Department of Agricultural Engineering School (ETSIA) at the UPM (Universidad Politécnica the Madrid) this method has been developed in doe rabbits (Pereda et al., 2006). Multiple regression equations have been calculated to predict their body composition at different physiological states. The objective of this study was to test the BIA procedure to predict de body composition of doe rabbits in French farms (INZO). 1) Validation of the method on other genetic (Hyplus from Grimaud). Thus, BIA measurements will be done at the INZO research centre and selected does will be sacrified and analysed via the UPM. 2) Field measurements will be done on French farms selected by INZO to correlate rabbit doe performances with corporal composition (via BIA). The measurements will be recorded as follow: 3 cycles AI+ 34 days 48 h before AI AI + 55 days Doe¿s weight X X X BIA measurements X X X Litter weight X after adoption - X Total rabbits / alive / dead X - X This contract also includes the training of INZO personal in BIA technique by UPM personal. | |
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Internacional
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No |
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Tipo de proyecto
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Proyectos y convenios de financiación privada |
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Entidad financiadora
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INZO-UNION INVIVO |
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Nacionalidad Entidad
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Sin nacionalidad |
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Tamaño de la entidad
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Pequeña Empresa (11-50) |
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Fecha concesión
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