Vie CONG. INTERN. REPROD. ANIM. INSEM. ARTIF., PARIS, 1968, VOL. Il

OBSERVATIONS ON ARTIFICIAL INSEMINATION OF
CHICKENS IN THE PHILIPPINES

Marciano D, Yanga®
Head, Department of Animal Breeding and Nutrition
Institute of Animal Husbandry, Araneta
University Foundation, Victoneta
Park, Rizal, Philippines

Artificial insemination has become so well-
established as a vital and important technique in
poultry research and breeding programs, This system
of breeding is not so widely adapted in the Philip-
pines, Poultrymen engaged in the production of
hatching eggs ordinarily resort to flock mating,

Realizing, therefore, the benefits that could be
derived from artificial insemination, a study has
been conducted along this line with special emphasis
on the fertility and hatchability of chicken eggs.,

REVLIEW OF LITERATURE., Cooper (1955) compared the fer=-
tility and hatchability resulting from inseminated
caged hens with controls mated naturally on the floor
for over 300 days, It was found out that hatchability
of all eggs set was in favor of the inseminated hens,

The percentage of fertility obtained by Agcanas
and Navarro (1957) was 83,72% from the eggs collected
three days after insemination of layers.

Wyne et al., (1959) observed that fertility was
definitely lowered if insemination was done when a
hard-shelled egg was in the shell gland, and the ave=
rage fertility was highest if insemination was done
in the aftermnoon,

The degree of fertility as pointed out by Boone
(1965) is determined by genetics and environment, Any
stress condition maybe a potential deterrent to fer-
tility, high or low temperature, high humidity, age
of birds, improper light intensity, day length, dis=-
ease, peck order, overcrowding, and wet litter, A
temperature of 102°F, for one day is deleterious, he
further stressed,

*With Marcelo V, Giron and Danilo S, Matunan,

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