@conference {40284,
	title = {The use of unfrozen semen for in vitro fertilisation of in vitro matured bovine oocytes},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {51},
	year = {1991},
	month = {Jan},
	pages = {67-72},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	abstract = {Two herds with high (HS) or low (LS) susceptibility to pasture  bloat have been selected divergently at Ruakura since 1972 using field  bloat scores. The present paper continues studies on weights of rumen  digesta, in 92 HS and 81 LS cull cattle experimentally slaughtered from  1985 to 1990. Traits recorded included pre-slaughter weight (PSW), hot  carcass weight (HCW), the fresh weight, dry matter percentage (DM\%) and  dry weight of rumen digesta, weight of full abomasum and omasum, carcass  composition, and weights of heart, liver, kidney and omental fat. In  addition, pre-feeding and post-feeding girths at the last rib were  obtained on 61 2- to 8-year old cows in mid-lactation, as a possible  predictor of variation in rumen contents and in bloat susceptibility.   The LS herd had a 10\% greater PSW than the HS herd (P<0.001), and  adjustments for body size were therefore made below to all traits from  the abattoir except HCW and DM\%. The fresh weights of digesta were  similar in the two herds, but the DM\% of digesta was 17\% greater in LS  than HS cattle (P<0.001). The weight of abomasum and omasum was 15\%  greater in LS than HS cattle (P<0.001), but there was no significant  herd effect on fasting weight loss. Heart and kidney weights were 8  to 9\% greater in LS than HS cattle. Ratios of rib girth to chest girth,  in the absence of bloat, were not significantly different between herds  at 1.172},
	issn = {1176-5283},
	author = {Seaton AD and Catt JW and Rhodes SL and McDonald MF and Welch RAS}
}
