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

Analysis of Environmental Components Controll-
ing Cestrus and Fertile Services (Cvulation)in
Indian Stabled Horses.

M. A, Hadi,
Artificial Insemination oOfficer,
NAGPTUR ( INDIA)

Incidence of subfertility and inferti-
lity in mares is generally reported to be due
to irregular Cestrous Cycle or in-appropriate
time of mating during the Cestrus. On scann-
ing through the available literature there is
hardly any reference to indicate the effect of
different environmental conditions on the var-
ious reproductive Phenomenon of horses.An att-
empt is therefore made to study the effect of
temperature, humidity, rainfall and period of
Sun-Shine over the Cestrous cycle and the fer-
tile services of the Indian Stabled horses.

Material & Method

The observations which form the basis
of present study pertains to the record of br-
eeding performances of 30 horses over the pe-
riod,1945 to 1968. The effect of fluctuations
of various environmental factors has been st-
udied with the help of special type of multi-
variate analysis-path Coefficient - a method
of dealing with a closed system of variables
that are linearly related. A Variance analy-
8is for each variable and a Co-variance anaw
lysis for each pair of Variables that had ex-
hibited some relationship with each other was
Computed. Thus, with the help of multiple and
partial regression and correlation, the path
co-efficient has been formulated and present-
ed in the form of diagram showing the inter
relationships of the variables concerned. In
constructing the diagram, the conventional me-
thod has been used to show double headed arrow
to indicate correlation between the basic fa-
ctors and a uni-directional arrow to signify
the direct path of influence from one varialle
to another. Thus two sets of path coefficients
have been designed,one indicating the effectdf

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