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Research
7.
Induction of fertile estrus in true
anoestrus by re-utilization of crestar implants in she buffaloes - Mahesh S. Dodamani,
M. K. Tandle, Khaja Mohteshamuddin and S. S. Honnappagol
Veterinary World, 2011, 4(1) : 28-30
doi:
10.5455/vetworld.2011.28-30
Abstract
The effect and economy of re-utilization of Crestar
implant alone and in combination with PMSG for
induction of fertile estrus in 30 true anoestrus she
buffaloes was conducted in and around Bidar district
of Karnataka state. The animals were randomly
divided into three groups of ten animals each. The
animals in Group 1 and 2 were injected with 500 mg
progesterone intramuscularly followed by
implantation of used Crestar on day 4 of
progesterone administration and removed on day
9,whereas animals in Group 2 were injected with 500
IU PMSG on day 9 (the day of implant
removal).whereas Group 3 served as control group. On
removal of the implant, 70.00 % she buffaloes from
Group 1 and 2 exhibited estrus (2.60 + 0.80 and 2.47
+ 0.73 days )respectively. The animals were
artificially inseminated twice with 12hrs interval
and conception rate was 70% from animals of Group 1
and 2. No extra beneficial effect of PMSG was
observed either on estrus response or conception
rate. None of the animals from Group 3 (control)
showed estrus. The animals of Group 1 and 2
exhibited 25 and 45 % and 50 and 20% intense and
intermediate estrus respectively with absolute
conception, while 30 % of the animals in both the
treated groups exhibited weak symptoms of estrus and
failed to conceive. 70 % of the animals from both
the groups had satisfactory arborization patterns
with 66.67 percent conception. Whereas only 20
percent of the animals in both the groups showed
good arborization patterns of cervico- vaginal mucus
with absolute conception. None of the animals
conceived expressing weak symptoms of estrus and
missing arborization pattern in both the treated
groups. It was concluded that utilized Crestar
implant (for 7 days) can also be re-utilized to
reduce the cost of treatment for induction of
fertile estrus even with out PMSG in field
conditions.
Keywords: Crestar re-utilization, estrus
induction, arborization, fertility, she buffalo
