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Descripción
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| The aim of this work was to evaluate the effect of level and type of fibre in the pre- slaughter diet and a fasting period of 12 h previous the slaughter on carcass yield and microbiological quality of rabbit carcass. Seventy two New Zealand White x Californian rabbits were fed with the same commercial feed (35% NDF from alfalfa hay (33%) and sugar beet pulp (10%), 13% starch, 7.4% soluble fibre) during the whole fattening period. During the last 10 d of fattening period (from 56 up to 66 d), one third of the rabbits were fed ad libitum with the same previous feed. The rest of animals were feed with an experimental diet formulated to contain a lower NDF level (32% NDF from alfalfa hay (30%) and wheat straw (4%)), 17% starch and 7.1% soluble fibre. The feed was removed 12 hours before the slaughtering in the half of rabbits that fed experimental diet. The remaining animals were fed experimental diet ad libitum since their transport to the slaughterhouse. Carcass yield was higher for animals fasted 12 hours before the slaughtering (1.5 points; P=0.002) than animals fed ad libitum since their transport to the slaughterhouse. The increase of dietary fibre content impaired the microbiological quality of rabbit carcass, because they had higher concentration of log cfu/g of total Aerobic and Enterobacteriaceae (P<0.001). A gradual increase with the time post-slaughter was observed in the microorganism content of the carcass. The highest values were reached 11 days after slaughter. The lowest values of log cfu/g of Clostridium perfringens of the caecal content (P<0.001) were found in animals fed ad libitum the highest fibrous diet (35% NDF with 10% of sugar beet pulp) with respect those fed experimental diet (32% NDF, where sugar beet pulp was substituted by barley and wheat straw). These lowest values of Clostridium perfringens were related with the lowest mortality of animals during the last ten days of fattening period (2.2% in those fed commercial diet and 11.3% in those fed experimental diet). | |
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Internacional
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No |
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Nombre congreso
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XXXIV Simposium de Cunicultura |
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Tipo de participación
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960 |
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Lugar del congreso
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Sevilla |
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Revisores
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Si |
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ISBN o ISSN
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978-84-8474-268-5 |
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DOI
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Fecha inicio congreso
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04/06/2009 |
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Fecha fin congreso
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05/06/2009 |
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Desde la página
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115 |
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Hasta la página
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120 |
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Título de las actas
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XXXIV Simposium de Cunicultura. Actas del Simposium |