@conference {41021,
	title = {Effect of prior ram-ewe contact on the ability of rams to stimulate early oestrus},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {58},
	year = {1998},
	month = {Jan},
	pages = {178-180},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	abstract = {Ram-ewe contact when ewes are in anoestrus may reduce the ram{\textquoteleft}s ability to stimulate oestrous activity in ewes. Conversely, oestrus ewes increase the ram{\textquoteright}s ability to stimulate ewes, possibly by increasing plasma testosterone concentration (T). On 25 November, 400 Romney ewes and 12 Dorset teasers were each randomised into 2 groups. One group of ewes and rams were joined while the others were isolated from the opposite sex. On 14 January (day 0) half of each group of ewes was joined for 35 days with either rams which had been previously exposed or not exposed to ewes, and mating marks were recorded each week. In a second experiment, 16 Romney rams were introduced (day 0) to oestrus or non-oestrus ewes and bled on days -1, 0, 2 and 5, and the blood plasma analysed for T. Rams not previously exposed to ewes stimulated more ewes to exhibit oestrus by day 35 than rams previously exposed to ewes (46\% vs. 30\%; P<0.01). Ewes previously exposed and those not exposed to rams responded similarly to ram stimulation, and by day 35 there was no difference in percentage of ewes mated. Both oestrus and anoestrus ewes increased T in rams on day 0. On day 2, T had returned to day -1 levels for rams with anoestrus ewes but increased further in rams with oestrus ewes (0.67 vs. 2.34 ng/ml; P<0.05). },
	issn = {1176-5283},
	author = {Knight TW and Ridland M and Litherland AJ}
}
@conference {40579,
	title = {Effect of breed on plasma carotene concentration in New Zealand dairy heifers},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {54},
	year = {1994},
	month = {Jan},
	pages = {119-120},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	abstract = {Factors affecting plasma carotene concentration were investigated in New  
Zealand dairy heifers.  Blood samples were collected from 4000 dairy heifers in  
spring in November 1992.  Significant (P<0.001) variation was found in  
plasma carotene concentrations due to region, breed and farm.  Values for  
individual cows ranged from 1.7 to 56.2 ug/ml.  Purebred Jersey heifers had the  
highest plasma carotene levels (18.2 {\textpm} 0.4 ug/ml), purebred Friesians the  
lowest (14.4 {\textpm} 0.2 ug/ml), crossbreds were intermediate with 50\% Jersey and  
50\% Friesian significantly different from the purebreds (16.9 {\textpm} 0.6 and 15.4 {\textpm}  
0.4 ug/ml respectively). },
	issn = {1176-5283},
	author = {Newman S-AN and Knight TW and O{\textquoteright}Neill KT and Death AF and Ridland M}
}
@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 {40428,
	title = {Effects of month and PMSG on the interval from CIDR removal to ovulation in Romney and Merino ewes},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {52},
	year = {1992},
	month = {Jan},
	pages = {261-264},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	abstract = {Ingestive behaviour and herbage intake were measured in 36  twenty-month old pregnant and non-pregnant Hereford x Friesian heifers  with an initial liveweight of 360 },
	issn = {1176-5283},
	author = {Knight TW and O{\textquoteright}Neill K and Ridland M and Hamilton G and Death A and Wyeth T}
}
@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}
}
