@conference {40414,
	title = {Effects of location and source of ewes and rams on the onset of oestrus in Romney ewes},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {52},
	year = {1992},
	month = {Jan},
	pages = {207-210},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	abstract = {Spermatozoal motility is known to be influenced both by the  diluent used and by the physical parameters involved in the processing  of semen. We have evaluated the effect of cooling and dilution on ram  spermatozoal motility in a defined semen diluent. The results indicated  that ram semen is best stored at 15 C, this temperature being reached by  cooling at a rate not greater than 3 C per minute. Time (up to 60  minutes from semen collection) and extent of dilution (500 or 800 x 10 6  spermatozoa per mil) were found to have no effect upon maintenance of  spermatozoal motility.  },
	issn = {1176-5283},
	author = {Knight TW and Muir PD and O{\textquoteright}Neill KT and Wallace GJ and Hamilton GJ and McLean K}
}
@conference {40267,
	title = {The effect of pre-mating feeding level and age on liveweight change on reproductive performance of cashmere does},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {50},
	year = {1990},
	month = {Jan},
	pages = {477-478},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	abstract = {The results in this field over the last 10 years at Ruakura and  relevant international data is reviewed. The nutrients involved have  been defined and a likely mechanism of action indicated. Pasture  allowance experiments indicated effects of pasture quality and a series  of pellet feeding trials defined effects of both energy (linear) and  protein (threshold) intakes. The threshold effect of protein was  confirmed by the abomasal infusion of protein. Analyses of changes in  blood concentrations of amino-acids indicated the involvement of the  branched-chain amino-acids (BCAA) and this has been confirmed by an  increased ovulation rate after intravenous infusion of BCAA. It is  concluded that the static and dynamic liveweight and the immediate  nutrient effects are the same response measured at different times. The  rate at which the response develops is dependant on the type of  feedstuff.   Studies into the mechanism of action in both intact and ovariectomised  ewes have ruled out effects on pituitary release of FSH either directly  or via interference with negative feedback influences. This indicates  that the effect is at the ovarian level and is mediated either by direct  action of the BCAA or indirectly via a metabolic hormone.  },
	issn = {1176-5283},
	author = {Parry AL and Edmonds DK and Knight TW and Hamilton GJ}
}
@conference {40180,
	title = {Breeding season of Romney and Poll Dorset ewes at different locations and the reproductive penalties of a June joining},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {49},
	year = {1989},
	month = {Jan},
	pages = {265-270},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	abstract = {The age at which permanent incisor teeth came into wear was recorded in 23 yearling flocks that differed in breed and management, and one mixed-age flock, of spring-born sheep. In female yearling flocks the first pair of incisors came into wear at a median age of 15 months, with a normal range of 13 to 17 months. Variation within flocks was seven times greater than between flocks. Teeth erupted 21 days earlier in male lambs than in half sib sisters. Time of eruption was not affected by lamb breed, date of birth or growth path. Data from the yearling flocks identified a substantial pool of animals older than 12 months of age that did not have two incisors in wear. These animals could be given dispensation for grading as lamb after the normal cut-off date if incisor teeth in wear is accepted as the cut-off criterion. This would help overcome the shortfall in supply of lean, heavy carcasses that occurs each spring before new season{\textquoteright}s lambs reach suitable size. In the mixed age female flock, the median ages when 2, 4, 6 and 8 incisors came into wear were 15, 23, 30 and 42 months. Later pairs of incisors came into wear earlier than commonly assumed and individuals with the same number of incisors varied in age by up to two years. These findings highlight substantial limitations to the use of number of incisors for determining age in sheep.},
	issn = {1176-5283},
	author = {Knight TW and Kannegieter SG and Hamilton GJ}
}
@conference {39722,
	title = {Phalaris and ryegrass pastures for animal production in Hawkes Bay},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {41},
	year = {1981},
	month = {Jan},
	pages = {119-124},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	issn = {1176-5283},
	author = {Wright DF and Kain WM and Hamilton GJ and Slay MWA and Luckman MS}
}
