@conference {40812,
	title = {Brief Communication: Effect of dietary vitamin A on plasma carotenoid concentration and fat colour in cattle},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {56},
	year = {1996},
	month = {Jan},
	pages = {193-194},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	abstract = {In two trials using cattle grazing green pasture, daily supplements of  1x106 IU vitamin A decreased plasma carotenoid (PC) concentration by 43- 58\% over 28-31 days. Neither increasing the dose of vitamin A to 2.5 x 106  IU nor continuing the supplement for 83 days further reduced PC  concentrations. These decreases in PC concentrations were not accompanied  by decreases in carotenoid concentration in the subcutaneous fat or fat  colour. This was possibly because PC concentration was still too high to  allow a loss of carotenoids from the fat depots. },
	issn = {1176-5283},
	author = {Knight TW and Death AF and Wyeth TK}
}
@conference {40547,
	title = {Brief Communication - Effects of stress and nutritional changes on the ranking of cattle on plasma carotene concentrations},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {53},
	year = {1993},
	month = {Jan},
	pages = {455-456},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	abstract = {The ability of endocrine manipulation of the neonate to effect prolonged  changes in body composition was examined. Treatment of lambs with  recombinant bovine somatotropin (rbST) at doses of 0.1 or 0.3 mg/kg  liveweight/day for 11 weeks from birth elevated circulating ST concentrations  (P<0.01) but had no effect on circulating concentrations of insulin-like growth  factor-1 or on liveweight gain compared with excipient-treated lambs.   However, at 8 months of age (5 months after cessation of treatment),  ultrasound backfat depths (Mean},
	issn = {1176-5283},
	author = {Knight TW and Ridland M and Hill FI and Death AF and Wyeth TK}
}
@conference {40543,
	title = {Brief Communication - Time and incidence of foetal mortality in alpacas},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {53},
	year = {1993},
	month = {Jan},
	pages = {437-438},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	abstract = {The deficiency of uridine monophosphate synthase is a disorder of  the de novo pathway for pyrimidine nucleotide biosynthesis. Inherited as an  autosomal recessive, it results in early embryonic mortality for the homozygous  recessive genotype. In the mid-1980{\textquoteright}s, heterozygotes were estimated at 1 - 2\%  among US Holstein cattle. The institution of a testing program for carriers and  refusal by US artificial insemination companies to accept carriers into their  progeny testing programs has eliminated the condition from the top 400 US  Holstein bulls. Bovine citrullinaemia is a defect of the urea cycle. Also  inherited as an autosomal recessive, it results in early postnatal mortality for  the homozygous recessive genotype. In 1990, heterozygotes constituted 0.3\% of  US Holstein cattle. At present, no known carriers are among the top 400 US  Holstein bulls. Carriers for either condition can be detected by convenient  and inexpensive DNA based testing. To guard against these conditions  reappearing, a modest testing program among prominent US bulls should be  continued and importers should insist that imported Holstein germplasm have  no evidence of these conditions.  },
	issn = {1176-5283},
	author = {Ridland M and Knight TW and Wyeth TK and Death AF}
}
@conference {40410,
	title = {Measurement of foetal size by ultrasonography and progesterone concentrations in pregnant alpacas},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {52},
	year = {1992},
	month = {Jan},
	pages = {191-194},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	abstract = {A high fleece weight Romney breeding flock (HFW) and a  contemporary random control flock (RC) has been established at MAF  Technology Woodlands Research Station by the intensive screening of ewe  and ram hoggets from commercial flocks. This paper summaries production  traits including reproductive performances, liveweight and fleece weight  of the ewe flocks over the 7 years.   The ovulation rate and number of multiple births per ewe lambed were  higher for HFW than RC ewes 1.84 vs 1.75 (SE0.02, p<0.01) and 0.62 vs  0.56 (0.02, p<0.05). Number of lambs born per ewe joined, number of  lambs reared per ewe lambed, the number of lambs weaned per lamb born  and number of lambs weaned per ewe joined in HFW were 1.49 (SE0.02),  1.37 (0.02), 0.84 (0.01) higher in HFW (65.4kg; SE2.4) than in RC (61.3  kg; 2.4). The greasy fleece weight averaged 4.55 kg (SE 0.21) for HFW  and 3.87 kg (0.21) for RC. This represents an average advantage of  17.6\% (P<0.001) to HFW over 7 production years. The results indicate  that the single trait selection for fleece weight will be associated  with increases in other important productive traits in long woolled  sheep.  },
	issn = {1176-5283},
	author = {Ridland M and Knight TW and Wyeth TK}
}
@conference {40368,
	title = {Oestrus synchronisation and oestrus detection in Swamp Buffaloes (Bubalus bubalis)},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {52},
	year = {1992},
	month = {Jan},
	pages = {25-28},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	abstract = {Selective mating of Perendale sheep for increased or reduced  susceptibility as lambs to an experimental challenge with Haemonchus  contorus commenced in 1986. Four years later changes were assessed  by monitoring faecal nematode egg count (FEC) in ewes and their progeny.   In the absence of drenching, mature flock ewes were given 7000 infective  larvae of H. contortus and 3000 larvae of Trichostrongylus  colubriformis in mid May 1990 after mating. FEC were monitored at  regular intervals during pregnancy and 4 times during the periparturient  period. Ewe and ram lamb progeny were faecal sampled on 5 occasions  between weaning (November 1990) and May 1991. Lambs were drenched at  most sampling dates. All stock were grazed across pasture contaminated  previously with mixed parasite populations.   Adult ewes selected as lambs for Resistance (low FEC) shed fewer eggs  than Susceptible (high FEC) line ewes throughout pregnancy, 2 weeks pre-  and 3, 6 and 9 weeks post-parturition. At the periparturient peak,  approximately 3 weeks after lambing, Low FEC line ewes maintained FEC  which were only 25\% of those in the High FEC line.   Lambs from the Low FEC line had significantly lower FEC than their High  counterparts on 3 of 5 sample dates (P<0.01). At the final sample date  (30 April 1991), there was a 10-fold difference in mean FEC between  extreme sire groups. Bulked faecal cultures demonstrated that  Haemonchus and Trichostrongylus were the dominant genera.  },
	issn = {1176-5283},
	author = {Hill FI and Knight TW and Death AF and Wyeth TK and Ridland M}
}
