@conference {40224,
	title = {Occurrence and effects of sub-clinical hypocalcaemia in dairy cows},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {50},
	year = {1990},
	month = {Jan},
	pages = {261-264},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	abstract = {The duration of melatonin release from Regulin implants and the   diurnal variation in plasma melatonin concentration was investigated in   18 cashmere wethers, divided into 3 treatments: C-control; T-treated   with melatonin 18mg Regulin implant on 10.11.88; PT - previously treated   with melatonin every 6 weeks for 10 months before receiving an implant   on 10.11.88. Mean concentration of plasma melatonin in T remained high   52 pg/ml for up to 42 days after implant, then declined to 8.5 pg/ml at   50 days remaining relatively low for the rest of the sampling period.   Goats from PT maintained much high concentration of plasma melatonin 226   pg/ml for 42 days after implant. Control goats showed very low mean   concentration at 5 pg/ml. Between animal variation in plasma melatonin   concentration was high coefficients of variation were between 100\% and   200\% within all treatments.     At 8 days post-implant plasma melatonin concentration of goats in C   showed a nocturnal increase averaging 12.5 pg/ml, between sunset and   sunrise. The same diurnal fluctations were evident at 29 days post-   implant. Goats in treatment T also showed a nocturnal rise in plasma   melatonin concentrations with average increases of 15 and 24 pg/ml at 8   and 29 days post implant between sunset and sunrise.     It can be concluded that the melatonin implants used in this trial   lasted for 42 days after administration and a nocturnal rise in   melatonin concentration was evident in control and treated goats.    },
	issn = {1176-5283},
	author = {Daniel RCW and Kerr DR and Mulei CM}
}
