You are here:
REPRODUCTIVE EFFECTS OF TRANSGENERATIONAL CADMIUM EXPOSURE
Citation:
Peterson, B. N., J. C. Allgood, C M. Foran, AND W H. Benson. REPRODUCTIVE EFFECTS OF TRANSGENERATIONAL CADMIUM EXPOSURE. Presented at 21st Annual Meeting of the Society of Environmental Toxicology and Chemistry, Nashville, TN, 12-16 November 2000.
Description:
Japanese medaka (Oryzias latipes) were used to compare the effects of environmentally relevant cadmium (Cd) exposure on reproduction in adult animals previously exposed in ovo or as hatchlings. Adults were raised either from eggs produced during a two week exposure to 0, 1, 5, or 10 ?g/L Cd or from medaka fry exposed for two weeks beginning 2 days after hatching. Adults resulting from 10 ?g/L in ovo exposure exhibited a hormetic increase in the number of eggs and hatchlings produced per day relative to the other exposed groups but no significant difference in the cumulative number of eggs or hatchlings produced over the entire two week period. Adults exposed as hatchlings (1 and 10 ug/L) exhibited a similar increase in the number of eggs and hatchlings produced per day relative to the control group. Nominal Cd concentrations were confirmed by atomic adsorption spectroscopy. Cd concentrations of 1?g/L, 5 ?g/L, 10 ?g/L were detected at 0.92 ?g/L, 4.24 ?g/L, 8.72 ?g/L respectively for the F1 in ovo exposure and 0.68 ug/L, 4.23 ?g/L, 8.48 ?g/L for exposed hatchlings. The results indicate that environmentally relevant Cd concentration should not adversely effect reproduction, and may produce transient increases in egg production in some species.