THE PHILIPPINE WATER BUFFALO
THE PHILIPPINE WATER BUFFALO
THE PHILIPPINE WATER BUFFALO
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after the second injection. The conception rate of 20 induced<br />
animals was 55% against 15% for a control group of 20<br />
normally cycling (uninduced) carabaos. However, the<br />
difference in conception incidence between two groups<br />
was not statistically significant (probability of calculated<br />
chi-square = 70). By manner of insemination, induced<br />
animals had a conception rate of 66.7% (8 of 12) for natural<br />
service and 40% (3 of 8) for artificial insemination. Control<br />
(uninduced) carabaos had 80% (8 of 10) and 50% (5 of<br />
10) conception rates for natural and artificial insemination<br />
sub-groups, respectively.<br />
Keywords: caracows, conception rate, estrus induction<br />
and synchronization, prostaglandin F 2 -alpha<br />
*Philippine Journal of Veterinary Animal Science. 8(1&2):55<br />
(Abstr.). Also in Annotated Bibliography on Philippine<br />
Biodiversity: Livestock and Poultry (Agrobiodiversity)<br />
1949-1997, Carabaos. (2002) p. 250<br />
R-23<br />
ESTRUS PHENOMENA OF CARABAO UNDER<br />
RANGE MANAGEMENT CONDITION*<br />
F. V. Mamuad, Instructor, DAS-CA, CLSU<br />
P. G. Duran, Science Research Specialist, PCRDC-PCARRD, CLSU<br />
H. V. Venturina, Science Research Specialist, PCRDC-PCARRD, CLSU<br />
A study was conducted to establish the estrous cycle,<br />
duration of estrus and diurnal variations on the incidence of<br />
estrus symptoms of Philippine carabao (PC) raised under<br />
range condition. Females in the institutional herd exhibiting<br />
normal cycles were used in the study. They were exposed<br />
to two vasectomized bulls and observed round the clock.<br />
A total of 886 observations indicated that estrus usually<br />
start in the morning. Peak incidence of estrus was observed<br />
during the cooler part of the day from 5:00 a. m. to 9:00 a.<br />
m. The average percentage of caracows that exhibited<br />
estrus in the morning was 79.03% as against 20.83% for<br />
those that showed heat in the afternoon. Duration of estrus<br />
was from 12 to 36 hours with a mean value 23.24 + 3.7<br />
hours and repeated every 22.49 + 6.9 days. Observable<br />
signs of estrus manifestation were mounting other animals<br />
(38.17%), standing still while being mounted by teaser<br />
bull (22.9%), and copious mucus discharge (36.10%).<br />
Symptoms like swelling and reddening of the vulva,<br />
bellowing and restlessness were observed in only 2.73%<br />
of the animals.<br />
Keywords: Philippine carabao, estrus, range condition<br />
*Philippine Journal of Veterinary Animal Science. 10(3-<br />
4):46 (Abstr.). Also in Abstracts of Water Buffalo<br />
Researches in the Philippines 1981-1995. 1996. PCC-<br />
DA. p. 54. Also in Annotated Bibliography on Philippine<br />
REPRODUCTION<br />
Biodiversity: Livestock and Poultry (Agrobiodiversity)<br />
1949-1997, Carabaos (2002) p. 184.<br />
R-24<br />
OPTIMIZING HANDLING PROCESSING TECH-<br />
NIQUES FOR <strong>THE</strong> PRODUCTION OF QUALITY<br />
SEMEN II. PRELIMINARY STUDY ON <strong>THE</strong><br />
REVIVABILITY OF <strong>BUFFALO</strong> SPERMATOZOA<br />
FOLLOWING DIFFERENT FREEZING METHODS*<br />
T. Matsumoto, Expert in Semen Processing, Japan Overseas Corp. Volntr.<br />
(JOCV)<br />
F. V. Mamuad, Associate Professor, DAS-CA, CLSU<br />
F. P. Aquino, Science Research Assistant, PCRDC-PCARRD, CLSU<br />
R. O. Cuaresma, Science Research Specialist I, PCRDC-PCARRD, CLSU<br />
The study aimed to develop an alternative freezing method<br />
for processing buffalo semen of high quality, utilizing limited<br />
materials. Three freezing methods were used: T1=ice<br />
chest, T2=tank freezing A, and T3=tank freezing B. Murrah<br />
buffalo (MB) (n=7), Philippine carabao (PC) (n=2), and F 1<br />
crossbred (MB x PC) (n=4) were used in the study. All<br />
ejaculates were diluted with Tris-yolk-raffinose glycerol<br />
extender up to a concentration of 100 million motile sperm<br />
per ml. Two freezing trials were made. First trial was with<br />
the use of T 2 versus T 1 . Second trial compared T 1 with that<br />
of T 3 . Results showed that T 2 gave higher post freezing<br />
revivability with 52.06 +11.39% than T 1 with 36.18% for<br />
all breeds tested. Similarly, postfreezing revivability of<br />
buffalo spermatozoa in T 3 was 53.30% +10.20%, which<br />
was higher that that of T 1 . Variation on percent revivability<br />
showed minimal differences among different breeds used.<br />
However, it is interesting to note that crossbred and PC<br />
postfreezing revivability was higher in T 2 while Murrah<br />
postfreezing revivability responded better in T 3.<br />
Keywords: buffalo spermatozoa, freezing methods,<br />
postfreezing sperm revivability<br />
*Philippine Journal of Veterinary Animal Science. 16( ):76<br />
(Abstr.) .Also in Abstracts of Water Buffalo Researches in<br />
the Philippines. 1981-1995. 1996. PCC-DA. p. 55-56.<br />
Also in Annotated Bibliography on Philippine Biodiversity:<br />
Livestock and Poultry (Agrobiodiversity) 1949-1997,<br />
Carabaos (2002) p. 264.<br />
R-25<br />
<strong>THE</strong> MONTHLY CALVING RATES AND CALVING<br />
INTERVAL OF CARABAOS RAISED IN CONFINE-<br />
MENT AND IN RANCH TYPE OF MANAGEMENT*<br />
V. G. Momongan, Professor, IAS-CA, UPLB<br />
A. S. Dabandan, Undergraduate Student, IAS-CA, UPLB<br />
A. S. Sarabia, Supervising Science Research specialist, PCC-UPLB, DA<br />
F. M. Mamuad, Center Director, PCC-CLSU, DA<br />
71
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