@conference {40694,
	title = {Effect of continuous stocking of breeding ewes at different sward surface heights during the late summer-autumn on herbage intake and productivity},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {55},
	year = {1995},
	month = {Jan},
	pages = {141-144},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	abstract = {This study aimed to raise GnRH antibodies in young bulls  (immunocastration) and determine the subsequent effect on behaviour,  sexual development, carcass characteristics and meat quality. Thirty Friesian  bull calves were assigned to one of three groups balanced by liveweight  (control bulls, immunocastrates and steers). At nine months of age (Day 0)  immunocastrates were vaccinated against GnRH (Vaxstrate) and boosted one  month later (Day 31). Following immunisation there was a rise in GnRH  antibody titre and a decrease in testosterone. Control animals gained  significantly more weight than immunocastrates and steers in the first 157  days. Overall there was no difference in weight gain between controls and  immunocastrates. Mean scrotal diameter of immunocastrates decreased from  Day 31 to Day 110 and then rose to reach a diameter similar to those of the  control bulls by Day 322. Leg wear scores were lower for treated animals  compared to controls until Day 230 of the trial, although these differences  were not significant. Immunocastrates had a significantly higher mean  ultimate pH than both control bulls and steers. Bulls were significantly  leaner than immunocastrates, and both groups were leaner than steers.  },
	issn = {1176-5283},
	author = {Panggabean AU and Morris ST and Parker WJ and McCutcheon SN}
}
