@conference {40168,
	title = {Correlated responses in a weight-selection experiment with beef cattle},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {49},
	year = {1989},
	month = {Jan},
	pages = {203-208},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	abstract = {Two experiments investigated the post-weaning nutritional requirements and subsequent growth rates of lambs born in May and June. The objective was to produce heavyweight lamb carcasses during the period of otherwise difficult supply (November to January). Experiment 1 examined the feed intake, growth rate and carcass composition of ram and ewe lambs born in late May (weaned late July) offered three pasture allowances. Pasture dry matter allowances of 6\%, 12\% and 22\% of liveweight/head/day resulted in average growth rates of 68, 1109 and 148 g/d, respectively in weaned lambs over the period from July to January. Experiment 2 investigated growth rates of June born lambs fed pelleted supplements (420 g DM/head/day) at pasture. Weaned ram lambs were offered either high protein, medium protein or no supplements at two pasture allowances (12\% and 22\% of live weight/head/day) for 12 weeks between September and December. At the low pasture allowance the high protein supplement gave a 13\% improvement in growth rate (P<0.05) over the medium protein supplement. For the final six weeks of the experiment, half of the high pasture allowance group was offered a white clover dominant pasture. Over this latter period the "clover" group had significantly higher growth rates (233 g/d) than lambs offered either high protein (204 g/d) or medium protein (184 g/d) or no supplements (161 g/d) at high pasture allowances. Carcass weights at slaughter (11th December) were 19.6, 18.6, 18.2 and 16.5 kg, respectively, for these four groups. High protein supplements at pasture increased lamb growth rates, particularly at a low pasture allowance. This would be useful during times of poor or unseasonal pasture production to ensure supply contracts are met, particularly for early, heavyweight lambs.},
	issn = {1176-5283},
	author = {Morris CA and Baker RL and Hunter JC}
}
@conference {39855,
	title = {Ten years reproduction performance data from Angus and Hereford weight selection herds},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {43},
	year = {1983},
	month = {Jan},
	pages = {185-188},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	abstract = {A sheep selection efficiency analysis developed to supplement recording on Sheeplan was applied to performance records in 8 groups- breeding scheme central flocks. Average flock size was 756 ewes, and 170 rams were selected from 4 birth-years for central flock use. Selection efficiencies for the Sheeplan two-tooth index were 64\%, 74\%, 70\% and 68\% for rams born in 1977/80 and the corresponding efficiencies for two-tooth ewes were 29\%, 27\%, 42\% and 44\% respectively. The selection of two-tooth ram and ewe replacements is expected to result in annual rates of improvement of 0.67\% in lambing rate, 0.16 kg in weaning weight, 0.34 kg in hogget live weight and 0.029 kg in hogget fleece weight. Other traits breeders emphasised included structural soundness, wool quality and hogget lambing performance. Opportunities for increasing rates of progress in sire breeding programmes are discussed.},
	issn = {1176-5283},
	author = {Morris CA and Baker RL and Hunter JC}
}
@conference {39702,
	title = {Preliminary results of selection for yearling or 18-month weight in Angus and Hereford cattle},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {40},
	year = {1980},
	month = {Jan},
	pages = {304-311},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	issn = {1176-5283},
	author = {Baker RL and Carter AH and Hunter JC}
}
