Oestrus synchronisation and oestrus detection in Swamp Buffaloes
(Bubalus bubalis)
F.I. Hill, T.W. Knight, A.F. Death, T.K. Wyeth, M. Ridland
AgResearch, Flock House Agricultural Centre, Private Bag 1900,
Bulls, New Zealand
Proceedings of the New Zealand Society of Animal Production.
1992, 52: 25-28
A trial was undertaken to evaluate the effectiveness of the
CIDR-B in buffalo. Twenty four, 20 month old buffalo heifers had CIDR's
inserted (day 0) for 12 days. Each heifer was injected intramuscularly
with 10 mg of oestradiol benzoate at CIDR insertion and 150 IU of PMSG
at CIDR removal. Two buffalo bulls fitted with chin ball harnesses were
introduced into each of 2 groups of 12 heifers. Continuous observations
of mating activity commenced 24 hours after CIDR withdrawal. The
heifers were bled for progesterone analysis on days -20, -9, 0, 2, 7, 12
and 26.9 CIDR's (38%) lost from the heifers were replaced immediately
after the losses were noticed. The mean interval from CIDR removal to
onset of mating activity was 50.3±3.4 (mean ± SE) hours and the duration
of mating activity was 19.3 ± 5.1 hours. Progesterone concentrations
while CIDR's were inserted were high. Based on progesterone analysis 21
of the 24 heifers had ovulated by day 14 after CIDR removal, but only 15
were observed mating with the bulls. CIDR-B can be used for
synchronisation of oestrus in buffalo, though there can be a high loss
rate. The plastic tail of the CIDR must be cut off to prevent other
buffalo removing it. Chin ball harnesses were successful for detecting
oestrus, but tail paint was not.
Keywords: NZSAPAB;
Buffaloes; CIDR-B; oestrus synchronisation; oestrus detection
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Last Updated 25-01-1997
