期刊
ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY
卷 51, 期 4, 页码 594-599出版社
SPRINGER
DOI: 10.1007/s00244-006-0026-2
关键词
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资金
- NCRR NIH HHS [P20 RR016469, 1 P20 RR16469] Funding Source: Medline
- NIEHS NIH HHS [1 R15 ES11788-01, R15 ES011788-01, R15 ES011788] Funding Source: Medline
The primary objective of this study was to determine whether cadmium (Cd) exposures alter reproduction in fathead minnows (Pimephales promelas). Pairs of sexually mature minnows were exposed to waterborne Cd at 0, 12.5, 25, or 50 mu g/L for 21 days. During this exposure period, the reproductive success of pairs was assessed. Following the exposure, gonadosomatic index (GSI), male secondary sexual characteristics, male plasma 11-ketotestosterone (11-KT) concentrations, and female plasma estradiol (E-2) concentrations were determined. Results of this study show that Cd exposures impair reproduction in fathead minnows. Pairs exposed to 50 mu g/L experienced a significant decline in spawning frequency and fecundity relative to unexposed minnows. Cd exposures also caused alterations in male secondary sexual characteristics, as males exposed to 25 mu g/L had significantly fewer nuptial tubercles than controls. Furthermore, males exposed to 12.5 mu g/L Cd experienced a significant increase in plasma 11-KT concentrations relative to controls. No alterations in GSI or female plasma E-2 concentrations were observed.
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