Long-term feeding of dieldrin, with a calcium stress, to Japanese quail (Coturnix coturnix japonica Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/sn00b167d

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  • 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.
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