|Abstract or Summary
- Two experiments were conducted using coturnix quail to determine
the effects of dieldrin and calcium on the reproductive performance
of this species. In both experiments quail were raised on a
soybean-meal glucose-monohydrate ration. At 25% egg production
the quail received diets containing 0, 10 or 25 ppm of dieldrin in
experiment I and 0, 5, 10 or 25 ppm of dieldrin in experiment II.
Quail receiving each of these pesticide levels were further subdivided
and fed diets containing 0. 5% and 3. 0% calcium.
In experiment I data were collected and analyzed over six, 28-
day production periods. The results show that specific gravity, egg
production, fertility, hatchability, egg weight, body weight, incidence
of cracked eggs and feed consumption were not affected by dieldrin
treatment. However, specific gravity, incidence of cracked eggs, egg production, hatchability and female body weight were adversely
affected by the lower calcium level. Male and female mortality was
significantly higher with 25 ppm of dieldrin than controls. Livability
of chicks fed 25 ppm dieldrin at both calcium levels and 10 ppm with
3. 0% calcium was lowered when compared to controls.
In experiment II data was collected and analyzed over four, 28-
day, production periods. Dieldrin was found not to decrease eggshell
thickness when levels of 5, 10, or 25 ppm were present in the ration.
Calcium at a level of 0.5% significantly reduced eggshell thickness.
Egg production was not significantly reduced by dieldrin supplementation
except during the first production period. Fertility, hatchability,
egg weight, male and female body weight and feed consumption were
also unaffected by dieldrin supplementation. The low calcium level
(0.5%) was observed to significantly depress egg production and
hatchability, but it did increase female body weight.
Mortality of adult quail was greatly affected when levels of 10
and 25 ppm of dieldrin were present in the ration. Five ppm of
dieldrin did not affect the mortality. Livability of chicks from hens
receiving dieldrin rations of 10 and 25 ppm were significantly lower
than chicks from hens receiving uncontaminated rations. Five ppm
dieldrin did not affect the survival rate of chicks.