Fertility of fallow deer (Dama dama) does following
synchronisation of oestrus with CIDR devices or prostaglandin
H.N. Jabbour, F.A. Veldhuizen, G. Green, M. Langridge, G.W.
Asher
MAF Technology, Ruakura Agricultural Centre, Private Bag,
Hamilton, New Zealand
Proceedings of the New Zealand Society of Animal Production.
1991, 51: 147-152
Two trials were conducted to determine the effect of different
oestrous synchronisation regimens on oestrous behaviour, timing of
ovulation and fertility of fallow deer. In Trial 1, 59 mature does were
allocated to 6 treatment groups (n+9-10 per group). Does in Groups 1, 2
and 3 each received an i.m. injection of an analogue of prostaglandin
F2alpha (PG; 500 ug cloprostenol) on Day 13 of a synchronised oestrous
cycle. Animals in Group 2 and 3 also received 50 or 100 IU PMSG
respectively at the time of PG administration. Does assigned to Groups
4, 5 and 6 each received an intravaginal CIDR device for 14 days with
animals in Group 5 and 6 also receiving 50 or 100 IU PMSG respectively,
at the time of CIDR device withdrawal. Incidence of oestrus was higher
following treatment with CIDR devices than with PG (29/30 vs 12/29,
P<0.001). PMSG induced earlier onset of oestrus (34.6±0.9 h vs 44.7±2.4
h, P<0.01) and reduced the range in the time of onset of oestrus (14 h
for PG-treated does and 22 h for progesterone-treated does). The
overall median time to ovulation was 26 h after the onset of oestrus.
The administration of 100 IU PMSG increased the incidence of luteinised
follicles and twin corpora lutea.
In Trial 2, 105 does were allocated to 4 groups (n=26-27 per group) and
treated with PG, PG + 50 IU PMSG, CIDR devices or CIDR devices + 50 IU
PMSG. The does were inseminated cervically with 200x10 6 frozen-thawed
spermatozoa at 12 h before the median time of ovulation as calculated
for each group from Trial 1. Pregnancy rates were determined by rectal
ultrasonography. The proportion of pregnant does was higher following
treatment with CIDR devices than with PG (38/52 vs 28/52, P<0.05) and
there was an interaction effect (P<0.01), with PMSG being beneficial
only for does treated with PG.
Keywords: NZSAPAB;
Fallow deer; Dama dama; oestrus; ovulation; CIDR devices;
prostaglandin; cervical insemination
Download abstract in text format
Last Updated 25-01-1997
