@conference {40403,
	title = {Melatonin for cashmere production in breeding does},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {52},
	year = {1992},
	month = {Jan},
	pages = {161-164},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	abstract = {Differences in onset of oestrus in Romney ewes has been observed  between locations at similar latitudes in the North Island. Two  experiments compared source of ewes and rams, and time of transfer of  ewes between locations on the onset of oestrus in Romney ewes. In Expt  1, groups of 30 ewes were interchanged between Wanganui and Takapau on  14 Nov, 5 Dec and 8 Jan. The next day these ewes plus 30 local ewes  were joined with 3 Poll Dorset rams. There were no effects of ewe  source but ewes at Takapau joined on 15 Nov, 6 Dec and 9 Jan had earlier  onsets-of-oestrus than ewes at Wanganui (P<0.05 to P<0.01). Ewes joined  on 15 Nov and 6 Dec at Wanganui had a later (P<0.01) onset of oestrus  than ewes joined on 9 Jan. In Expt 2, 60 ewes and 3 Poll Dorset rams  were interchanged between Wanganui and Poukawa on 13 Nov. These ewes  plus 60 local ewes were randomly divided in half and recombined to form  2 mixed groups which were joined with 3 Poukawa or 3 Wanganui Poll  Dorset rams. Onset of oestrus was earlier at Poukawa (P<0.001) and for  ewes joined with Wanganui rams (P<0.001) but there were no effects of  ewe source.  },
	issn = {1176-5283},
	author = {O{\textquoteright}Neill KT and Litherland AJ and Hamilton G}
}
