Abstract
Effects of chronic dietary exposure to low levels of PCBs (polychlorinated biphenyls) on reproduction, growth and whole body burdens were investigated in three generations of Peromyscus polionotus. Mated pairs were maintained on a diet containing 5 mg/kg PCBs (Aroclor 1254®) for 12 months, beginning exposure as young adults; matched controls received a similar diet without PCBs. Offspring were maintained on the parental regime and paired at maturity with non-siblings in the same group. In first and second generation offspring, birth and weaning weights were significantly lower in PCB-exposed animals; in the second generation, there were also significantly fewer mice born/month, longer intervals prior to birth of the first litter, and decreased survival to weaning (25 days) among exposed mice. Whole body residue of PCBs increased significantly with each generation of exposure. This study clearly shows that chronic exposure to PCBs at a dosage of 5 mg/kg depressed fertility, growth and survival in Peromyscus, and that these effects were amplified through multigenerational exposure.
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McCoy, G., Finlay, M.F., Rhone, A. et al. Chronic polychlorinated biphenyls exposure on three generations of oldfield mice (Peromyscus polionotus): Effects on reproduction, growth, and body residues. Arch. Environ. Contam. Toxicol. 28, 431–435 (1995). https://doi.org/10.1007/BF00211624
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DOI: https://doi.org/10.1007/BF00211624