@conference {40314,
	title = {Lactation in transgenic mice expressing the ovine Beta-lactoglobulin gene},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {51},
	year = {1991},
	month = {Jan},
	pages = {225-226},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	abstract = {The efficiency of winter feed use for weaner calf production was  compared in a yearling heifer mating system compared to a 2 year old  first mating system in traditional and dairy x beef cows. These  computer modelling analyses illustrated, with yearling heifer mating  compared to 2 year old first mating, that the total weight of calf  weaned per unit of winter feed required is increased by only 2\% (Angus  dams) and 6\% (Hereford x Friesian dams, HxF). With HxF dams compared to  Angus dams, the total weight of calf weaned per unit of winter feed  required was increased by 8\% (2 year old first mating) and 13\% (yearling  heifer mating).   Yearling heifer mating rather than 2 year old first mating within a  traditional beef cow breed is questioned, when compared at the same  winter feed requirement. The superiority of dairy x beef breeding cows  on the basis of calf production from winter feed is confirmed by this  analysis.  Furthermore, this superiority is maximum when yearling  heifer mating is also adopted.  },
	issn = {1176-5283},
	author = {Wilde CJ and Clark AJ and Kerr M and Knight CH and McClenaghan M and Simons JP}
}
@conference {40213,
	title = {The germline manipulation of livestock: progress during the past five years},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {50},
	year = {1990},
	month = {Jan},
	pages = {167-180},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	abstract = {The role of endoparasitism on host nutrition was reviewed and   the opportunities for manipulation considered with emphasis on two   specific nutrients for which information is becoming available-protein   and copper.     The major effect of parasitism on protein metabolism is to increase the   protein requirement of the host as a result of increased endogenous loss   of protein rather than malabsorption per se. Protein supplementation has   been shown to increase liveweight gain of infected sheep and to reduce   faecal egg counts and worm burdens probably reflecting enhanced   immunological competence of the host. Such rates of protein supply   could be achieved in practice on temperature pastures if protein losses   across the rumen could be reduced.     Liver copper levels have been shown to be depressed by parasitism in the   abomosum. The effectiveness of oral copper supplements depends on their   ability to increase soluble copper levels in abomasal digesta, which is   reduced by nematode-induced increase in pH. Intake depression has by   far the greatest effect on production loss due to endoparasitism.   Evidence is emerging that the mechanism for this depression has a   peripheral hormonal and central neural basis.     It was concluded that specific nutrient manipulation in plants or via   supplements may enable the host to cope better with the   debilitating effects of endoparasitism.    },
	issn = {1176-5283},
	author = {Clark AJ and Archibald AL and McClenaghan M and Simons JP and Whitelaw CBA and Wilmut I}
}
