@conference {40027,
	title = {A comparison of rams from fleece weight-selected and randomly bred Romney flocks for intake, wool growth and feed utilisation},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {46},
	year = {1986},
	month = {Jan},
	pages = {215-218},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	abstract = {Trials undertaken at Rotomahana in 1984 and 1985 examined factors involved in sheep AI and provided a link between Rotomahana and a commercial AI programme. Semen collected and diluted by the New Zealand Dairy Board gave similar conception rates (46\%) to semen collected at Rotomahana (42\%). Results in 1984 indicated that there was a small but non-significant decrease in conception rate with semen storage time up to 15 hours (5 h 68\%, 10 h 61\%, 15 h 57\%). In 1985 there was a highly significant difference between 5 and 20 h storage (46\% v 25\%) and this result was consistent over ewe ages and dose rate. In 1985, 200x10 6 sperm dose was compared to 100x10 6 dose in 3 subtrials. The overall conception rates were 45.7\% and 37.5\% respectively (P<0.05). In 1984 diluted semen stored in glass and inseminated using a fine glass pipette gave a higher, but not significant, conception rate than semen stored in mini straws and inseminated using a standard cattle pistollet (66\% v 58\%). In 1985 all semen was stored in glass and inseminated with either a glass pipette (conception rate of 49.8\%) or a cattle pistollet (43.2\%). This difference was non-significant, although there was a significant interaction of insemination equipment with dose rate. A significantly higher conception rate was achieved for cervical (52.8\%) than blind insemination (29\%) when ewes were inseminated {\textquoteright}on time{\textquoteright} in 1985 and this effect was consistent over dose rate. There was no difference in conception rate when {\textquoteright}on-oestrus{\textquoteright} insemination was compared to {\textquoteright}on-time{\textquoteright} (63\% v 61\%). All first-order interactions among the effects of storage time, insemination method and {\textquoteright}on-oestrus{\textquoteright} v {\textquoteright} on-time{\textquoteright} were non-significant in the 1984 trial.},
	issn = {1176-5283},
	author = {McClelland LA and Blair HT and Wickham GA and Brookes IM}
}
