@conference {40060,
	title = {Accessing of slaughterhouse information to livestock production systems},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {47},
	year = {1987},
	month = {Jan},
	pages = {85-87},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	abstract = {The trial reported in this paper was undertaken at the Rotomahana Research Station to compare the performance of sheep of different genetic background and breeding history. Border Leicester, Coopworth and Romney rams from different sources were mated to Romney ewes representing a wide range of genetic sources between 1979 and 1983.  Rams from 6 Romney strains were sampled including a commercial industry sample, the Ruakura High Fertility (RHF) flock, a Romney stud and 3 group breeding schemes. The Coopworth ram source was also a large group breeding scheme. Data collected on the first cross females born between 1979 and 1983 and lambing between 1981 and 1985 are summarised in this paper. Analyses of ewe hogget performance (growth, wool production and oestrous activity) revealed relatively minor variation among the 6 Romney strains, with the exception of greater oestrous activity in RHF-sired hoggets. Coopworth and Border Leicester crosses were heavier, had higher fleece weights and showed more oestrous activity than straightbred Romneys. Highest reproductive performance was obtained from Coopworth and Border Leicester crosses reflecting breed differences, positive heterosis and heavier ewe body weights. Among the 6 Romney strains greatest variation in reproductive performance was seen for litter size with the RHF-sired ewes excelling and also having the best performance for lambs weaned per ewe joined and lambs weaned per ewe joined as a ratio of ewe body weight. Similarly, the litter size advantage for ewes sired by rams from the 3 Romney group breeding schemes demonstrated that selection for reproductive performance over a period of 10 to 15 years has been successful.},
	issn = {1176-5283},
	author = {Hathaway SC and McKenzie AI}
}
@conference {40059,
	title = {Quantitative risk assessment and cost-effectiveness: two important requirements for meat inspection programmes},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {47},
	year = {1987},
	month = {Jan},
	pages = {81-83},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	abstract = {Lines of 40 ram lambs of a variety of breeds from 22 farms in Canterbury, and initially weighing between 32 and 40 kg live weight, were assembled on a farm and compared for growth rate and lean carcass gain during 12 weeks. High quality legume dominant pastures were used and changes in carcass measurements obtained from samples of lambs slaughtered at the start and end of the trial. Average growth rates and rates of lean carcass gain among lines ranged from 143 to 252 g/d and 27 to 53 g/d respectively. Lines of specialist meat and short-wool breeds (Suffolk-cross, Perendale and Dorset) had higher average gains than long-wool breeds (Corriedale, Coopworth and Romney). The long-wool breeds showed greater variation in fat measurement GR (S.D. },
	issn = {1176-5283},
	author = {Hathaway SC and McKenzie AI}
}
