Effects of supplementary concentrate level in winter, and subsequent finishing on pasture or indoors, on performance and carcass traits of Holstein–Friesian, Aberdeen Angus×Holstein–Friesian and Belgian Blue×Holstein–Friesian steers

A comparison of finishing systems and duration for spring-born Aberdeen Angus×Holstein-Friesian and Belgian Blue×Holstein-Friesian steers

“…If this adaptation period is excluded, then relative daily intake was higher for the animals previously on pasture. This is in agreement with previous results (Keane and Drennan, 2009) to the effect that animals coming off a lower feeding level have similar absolute intake, but a higher intake per kg live weight, than animals that are heavier due to a previously higher feeding level.…”

“…The findings on the relative intakes of Belgian Blue and Aberdeen Angus cattle are equivocal. The reports of Cuvelier et al (2006) and Keane and Drennan (2008) agree with the present findings, but Ferrell and Jenkins (1998) and Keane and Drennan (2009) detected no difference in intake between these breed types. There is no obvious explanation for this apparent contradiction but in all cases the intake differences were small (e.g.…”

Effects of genetic merit for carcass weight, breed type and slaughter weight on performance and carcass traits of beef × dairy steers

“…Campion et al (2009a) reported differences between AA and BB of 20 and 50 kg for high and low EPD CWT animals, respectively. The 29 g/kg difference between AA and BB in kill-out proportion is identical to that observed by Campion et al (2009a) and similar to the values of 24 g/kg (Keane and Drennan, 2008), 19 g/kg (Keane and Moloney, 2009) and 24 g/kg (Keane and Drennan, 2009) reported previously. The differences between AA and BB in carcass conformation and fat classes are also similar to values reported previously Drennan, 2008 andKeane and Moloney, 2009).…”

“…The 13 g/kg greater hind quarter proportion for BB over AA compares with previous values of 18 g/kg (Keane and Drennan, 2008), 17 g/kg (Keane and Drennan, 2009), 20 g/kg (Keane and Moloney, 2009) and 17 g/kg (Campion et al, 2009b).…”

Beef production from Holstein–Friesian, Norwegian Red×Holstein–Friesian and Jersey×Holstein–Friesian male cattle reared as bulls or steers

“…The fact that there was a difference in carcass conformation class but not in scaled carcass measurements might appear inconsistent in that both are considered indicators of carcass compactness. However, while differences in carcass conformation are frequently associated with differences in scaled carcass measurements (Keane and Drennan, 2009;Campion et al, 2009a) this is not always so (Keane, 2003). The greater carcass measurements (scaled for carcass weight) for JE compared with HF and NR does indicate poorer carcass compactness and it agrees with the greater body measurements and poorer carcass conformation for JE mentioned earlier.…”