Samenhang tussen voerintensiteit, slachtleeftijd, karkasgewicht en vleeskwaliteit bij rosékalveren

Op het proefbedrijf Vleesvee van de Waiboerhoeve in Lelystad is in 2001-2002 een proef uitgevoerd waarin de samenhang tussen slachtleeftijd, karkasgewicht, vleeskwaliteit en de technische prestaties van rosékalveren is onderzocht. Bij de proef waren 150 zwartbonte stierkalveren betrokke

Samenhang tussen voerintensiteit, slachtleeftijd, karkasgewicht en vleeskwaliteit bij rosékalveren

Op het proefbedrijf Vleesvee van de Waiboerhoeve in Lelystad is in 2001-2002 een proef uitgevoerd waarin de samenhang tussen slachtleeftijd, karkasgewicht, vleeskwaliteit en de technische prestaties van rosékalveren is onderzocht. Bij de proef waren 150 zwartbonte stierkalveren betrokke

The effect of thermal preslaughter stress on the susceptibility of broiler chickens differing with respect to growth rate, age at slaughter, blood parameters, and ascites mortality, to hemorrhages in muscles

In this study we investigated the occurrence of hemorrhages in four groups of electrically stunned broilers, differing with respect to growth rate, age at slaughter, hemodynamic parameters, and ascites mortality. In addition, the effect of three thermal preslaughter conditions on hemorrhage occurrence in thigh and breast muscles was studied. Broilers were either reared at a thermoneutral or low temperature regimen, and were either restricted in their feed consumption or consumed feed ad libitum. Prior to slaughter the broilers were exposed for 2 ± 0.5 h to either cold (4 ± 2 C, RH 100%), moderate (19 ± 2 C, RH: 70 to 80%), or warm (30 ± 2 C, RH: 60 to 70%) conditions. There was no effect of rearing group, nor was there an interaction between rearing group and preslaughter condition on hemorrhage scores in the thighs or breasts. Preslaughter conditions only affected hemorrhage scores in the left thigh. Scores were highest in broilers exposed to moderate preslaughter conditions. These data indicate that the cause of hemorrhages in muscles is multifactorial. Hemorrhage severity was not diminished in broilers retarded in growth. Pathological hemodynamic adaptations to low rearing temperatures/ leading to ascites, did not increase hemorrhage severity, neither upon exposure to moderate nor to cold or warm preslaughter conditions

Verbeteren eetkwaliteit van stierenvlees

Butchers and retailers in the Netherlands have been very critical of the uniformity and eating quality of Dutch beef. In response, various production chain projects have been set up in which stipulations have been made about beef breed, feeding strategy and age at slaughter. These stipulations will improve the uniformity, but the effect these factors will have on eating quality is less certain. To clarify this, the Research Institute for Animal Husbandry (PV) conducted a study jointly with the Institute for Animal Science and Health (IDLelystad). It entailed fattening 48 Charolais and 48 Piedmont cross beef bulls on the beef enterprise on Waiboerhoeve according to different finishing strategie