EFFICACY OF CONTROLLED INTERNAL DRUG RELEASE (CIDR-B) IN SYNCHRONIZATION OF ESTRUS IN FRIESIAN X BUNAJI AND BUNAJI COWS
EFFICACY OF CONTROLLED INTERNAL DRUG RELEASE (CIDR-B) IN SYNCHRONIZATION OF ESTRUS IN FRIESIAN X BUNAJI AND BUNAJI COWS
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Date
2014-10
Authors
ACHI, Neyu
Patrick
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Abstract
The study was designed to evaluate the efficacy of Controlled Internal Drug Release (CIDRB),
CIDR + Prostaglandin 2α and Prostaglandin F2α alone in synchronizing estrus, conception
and pregnancy rates in Bunaji and Friesian x Bunaji cows. The study was conducted between
July and October using forty seven cows (47) consisting of twenty four (24) Bunaji and twenty
three (23) Friesian x Bunaji cows in a 2x3 factorial arrangement with eight (8) cows each
except for treatment III which had seven (7) Friesian x Bunaji cows. Cows used for this study
were rectally palpated for cyclicity, aged between 3-5 years and body condition score 2.5 and
above. CIDR coated with 1.39g of progesterone was inserted through the vagina with the aid of
an applicator, on day six (6) 2ml of PGF2α (Estrumate) was administered intramuscularly
before CIDR removal on day seven (7). Behavioural signs of estrus were observed after insert
removal, standing to be mounted was the primary sign of estrus used in this study and cows
that came into estrus were inseminated by experienced inseminators 8-12 hours after.
Retention rates were 100 % for all the treatments. Estrus response rates were 62, 56 and 26 for
CIDR and CIDR + PGF2α respectively. Interval to onset of estrus was shorter for CIDR +
PGF2α 3 hours and 1.75 hours than CIDR 5.0 hours and 5.0 hours in Bunaji and Friesian x
Bunaji cows. Estrus duration was longer in Friesian x Bunaji; 12 hours CDIR, 13.5 hours than
Bunaji 7.00 hours CIDR, 11.0 hours CIDR + PGF2α. Number of mounts were more in Friesian
x Bunaji cows; 9.00 hours CIDR, 11.25 CIDR + PGF2α than in Bunaji 8.66 hours CIDR, 4.33
CIDR + PGF2α. More cows came into estrus between 6 am and 12 noon than 12 noon to 6 pm.
Cows inseminated were rectally palpated for diagnosis of pregnancy. Conception rates were 33
% for Bunaji and 42 % Friesian x Bunaji treated with CIDR, 60 % for Bunaji and 50 % for Friesian x Bunaji treated with CIDR + PGF2α and 0 for Bunaji and 75 for Friesian x Bunaji
treated with PGF2α. It is concluded from the study that, CIDR, CIDR + PGF2α are capable of
synchronizing estrus in Bunaji and Friesian x Bunaji cows. Prostaglandin was effective only in
Friesain x Bunaji cows. Estrus response, conception and pregnancy rates could be improved
using a combination of CIDR + PGF2α.
Description
A THESIS SUBMITTED TO THE SCHOOL OF POSTGRADUATE STUDIES,
AHMADU BELLO UNIVERSITY, ZARIA, NIGERIA.
IN PARTIAL FULFILMENT OF THE REQUIREMENTS FOR THE AWARD OF
MASTERS DEGREE IN ANIMAL SCIENCE.
Keywords
EFFICACY OF CONTROLLED,, INTERNAL DRUG RELEASE,, SYNCHRONIZATION OF ESTRUS,, FRIESIAN X BUNAJI AND BUNAJI COWS.