@conference {40202,
	title = {Characterisation of the insulin status of lambs and consequences for carcass composition},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {50},
	year = {1990},
	month = {Jan},
	pages = {97-100},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	abstract = {As part of the study into the mechanism by which nutrition   influences ovulation rate two trials have been conducted to examine the   effect of protein intake on the negative feedback of oestradiol-17Beta   (E17Beta) on plasma FSH levels. In Trial 1 three groups of   ovariectomised ewes (n=8) fed on a low protein (LP 11\%, 10 MJ ME) diet   were treated with silastic implants of E17Beta. Four days after implant   insertion one group was changed to a high protein (HP 22\%) diet while   another was treated orally for 10 days with phenobarbital (1 g/d). The   E17Beta implants were removed 6 days after treatment started. In Trial 2   groups of ewes (n=6) were given either full (HE) or 1/2 size (LE)   implants for 5 days. All ewes were fed on a LP diet but 2 groups were   infused abomasally with 100g/d of protein (HP) commencing 3 days before   implant. FSH levels were monitored 4 x d throughout both trials and   expressed as a percentage of pre-treatment values. In Trial 1 FSH   levels were 33\% on day 11 after implant with no treatment difference.   However after implant removal the values for the LP ewes returned to   100\% by day 17 while for the HP and phenobarbital group values remained   at 33\%. In Trial 2 the levels 4 days after implant insertion were 37\%,   and 48\% for the HE and LE ewes. Again protein treatment delayed   recovery following implant removal. These results do not support the   hypothesis that the increased ovulation rate following protein   supplementation is due to a reduction in negative steroid feedback on   FSH levels.    },
	issn = {1176-5283},
	author = {Willis JA and Bickerstaffe R and Munro JM and O{\textquoteright}Connell D}
}
