Skip to main content Accessibility help

The effect of melatonin on seasonal reproduction of indigenous and crossbred dairy goats in Greece

  • D. Zygoyiannis (a1), P. H. Davies (a2) and J. M. Doney (a3)


The effects of melatonin implants, administered during anoestrus, on the time of onset of oestrus, conception rate and litter size in indigenous (Capra prisca) and crossbred dairy goats were studied on commercial farms in a hill region of northern Greece. In the 1st year, 192 indigenous and 86 crossbred does on one farm (farm 1) were each separated into treated (T) and control (C) groups. The T groups from each breed type were given implants of melatonin on 17 April and 6 May, respectively. Bucks were re-introduced to both T and C groups 5 weeks after implantation. Mean mating dates for indigenous goats were 6 July (s.e. 0·15) (T) v. 13 July (s.e. 0·24) (C). Corresponding dates for crossbreds were 31 July (s.e. 0·61) (T) v. 14 August (s.e. 0·87) (C). Treatment did not significantly affect conception rate. Mean kidding dates (from first service) were 6 December (s.e. 0·18) (T) v. 14 December (s.e. 0·28) (C) for indigenous and 31 December (s.e. 0·64) (T) v. 13 January (s.e. 0·82) (C) for crossbred goats. Litter size was higher in both T groups but the difference was not significant. In the 2nd year the indigenous flock on farm 1 was supplemented by two similar neighbouring farms. Farm 1 had both treated does and control does; farm 2 were all treated and farm 3 were untreated control does. In this year all bucks used on treated does were also implanted. All implants were given on 21 April. Mean mating dates were 21 June (s.e. 0·23) (1/T) v. 9 July (s.e. 0·36) (1/C), and 28 June (s.e. 0·09) (2/T) v. 19 July (s.e. 0·15) (3/C). Conception rate was high in all groups. Corresponding mean kidding dates were 22 November (1/T) v. 11 December (1/C) and 29 November (2/T) v. 22 December (3/C). Litter size was higher (F > 0·05) in T than in C groups.



Hide All
Devenson, S., Arendt, J. and Forsyth, I. F. 1989. Artificial long-days in spring followed by melatonin treatment advances the breeding season of goats. Proceedings of the fortieth annual meeting of the European Association for Animal Production, Sheep and Coat Commission, vol. 11, p. 113 (abstr.).
English, J., Poulton, A. L., Arendt, J. and Symons, A. M., 1986. A comparison of the efficiency of melatonin treatments in advancing oestrus in ewes Journal of Reproduction and Fertility 77: 321327.
Haresign, W. 1990. Controlling reproduction in sheep. In Neiv developments in sheep production, (ed. Slade, C. F. R. and Lawrence, T. L. J.), occasional publication, British Society of Animal Production no. 14, pp. 23-37.
Kouimtzis, S. A., Belibasaki, S. and Doney, J. M. 1989. Melatonin advances and condenses the onset of seasonal breeding in Greek dairy ewes. Animal Production 48: 399405.
Kouimtzis, S. A., Laliotis, V., Lymberopoulos, A. and Vosniakou, A. 1990. The effect of melatonin implants on the ewes breeding season. Proceedings of the fifth panhellenic veterinary congress, Thessaloniki, p. 33 (abstr.).
McPhee, S., McGregor, B., Williams, A.Ayton, B. B. and Staples, L. 1989. Induction of an earlier joining and an improvement of kidding percentage by use of melatonin implants in Angora does. Proceedings of the Australian Society of Reproductive Biology, vol. 19, p. 24 (abstr.).
Peaker, M. and Linzell, J. L. 1974. The effects of oestrus and exogenous oestrogen on milk secretion in the goat. Journal of Endocrinology 61: 231240.
Russel, A. J. F., Doney, J. M. and Gunn, R. G. 1969. Subjective assessment of body fat in live sheep. Journal of Agricultural Science, Cambridge 72: 451454.
Vosniakou, A. G., Doney, J. M. and Tsakalof, P. 1989. A note on the seasonal oestrous period in three breeds of Greek dairy sheep. Animal Production 49:147150.
Zygoyiannis, D. 1988. Performance of indigenous goats (Capra prisca) in Greece as affected by season of kidding. World Review of Animal Production 24: 3136.


The effect of melatonin on seasonal reproduction of indigenous and crossbred dairy goats in Greece

  • D. Zygoyiannis (a1), P. H. Davies (a2) and J. M. Doney (a3)


Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed