Summary
p,p′-DDT and p,p′-DDE were investigated for effects on egg production and eggshell thickness in Japanese quail. p,p′-DDT was examined for effects on hatchability and fertility. DDE was tested at 0, 2, 10, 40, and 200 ppm in the diet. No evidence suggested that DDE affected number of eggs laid, egg weight, or eggshell thickness at any level of DDE tested. DDT was tested at 1, 2.5, 10, and 40 ppm in the diet. In one experiment, quail fed DDT at 40 ppm and caged in male-female pairs broke more eggs than quail caged similarly but fed lower amounts of DDT or than quail fed an equal amount of DDT but caged alone. DDT did not detectably reduce eggshell thickness, number of eggs laid, fertility, or hatchability. However, paired quail laid fewer eggs than did single quail in two experiments and laid eggs with thinner shells in one experiment.
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Davison, K.L., Engebretson, K.A. & Cox, J.H. p,p′-DDT andp,p′-DDE effects on egg production, eggshell thickness, and reproduction of japanese quail. Bull. Environ. Contam. Toxicol. 15, 265–270 (1976). https://doi.org/10.1007/BF01812634
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DOI: https://doi.org/10.1007/BF01812634