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Descripción
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| Iberian (IB) pigs are the ancestral dark?Chaired pigs of Spain. Currently, 80% of IB pigs are reared under intensive production systems and slaughtered at 140?C150 kg body weight (BW). Both sexes are castrated. However, the production of heavy white pigs destined to dry?Ccured products is based on intact females (IF). Therefore, IF might be also an alternative to castrated females (CF) for IB pig production. A total of sixty crossbred (IB dam ¡Á Duroc sire) females, 80 d of age (17.6 ¡À 0.13 kg BW) was used to investigate the effect of castration of females on fresh meat quality and fatty acid profile of backfat (BF) of IB pigs reared under intensive production systems and slaughtered at 144 kg BW (269 d of age). Females were ovariectomized at 93 d of age (26.0 ¡À 0.19 kg BW). Meat samples were taken at m. Longissimus dorsi at the level of the last rib and BF samples were taken at the tail insertion. Each treatment (coded IF, CF) was replicated five times and the experimental unit was a pen with six pigs. Castrated females had 27.2% more fat and 2.7% less moisture in the m. Longissimus dorsi than IF (P ¡Ü 0.05). Muscular fat content was lower for IF than for CF (6.6 vs. 9.1%; P ¡Ü 0.05) but in all cases fat content was higher than required to generate high quality dry?Ccured products. Meat from IF was more lightness (higher L* value; P ¡Ü 0.01), redder (10.1 vs. 7.5 for a*; P ¡Ü 0.001), and had more intensive colour (16.7 vs. 11.2 for c*; P ¡Ü 0.001) than meat from CF. Subcutaneous fat was more saturated (39.1 vs. 38.2%; P ¡Ü 0.05) in CF than in IF, mostly because of the higher palmitic acid content (P ¡Ü 0.05). Also, CF had lower linolenic acid content (0.61 vs. 0.68%; P ¡Ü 0.05) than IF. We conclude that based on animal welfare, cost of castration, meat quality traits, and fatty acid profile, intact females are a good alternative to castrated females to produce high quality Iberian dry?Ccured products. | |
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Internacional
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Si |
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Nombre congreso
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Joint ADSA-ASAS Annual meeting |
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Tipo de participación
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960 |
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Lugar del congreso
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Indianapolis, Estados Unidos |
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Revisores
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Si |
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ISBN o ISSN
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0021-8812 |
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DOI
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Fecha inicio congreso
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07/07/2008 |
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Fecha fin congreso
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11/07/2008 |
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Desde la página
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37 |
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Hasta la página
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37 |
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Título de las actas
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Journal of Animal Science |