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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Yonkos, Lance T. Fisher, Daniel J. Van Veld, Peter A. Kane, Andrew S. McGee, Beth L. Staver, Kenneth W. |
| Description | Country affiliation: United States Author Affiliation: Yonkos LT ( University of Maryland, Wye Research and Education Center, Queenstown, Maryland 21658, USA. lyonkos@umd.edu) |
| Abstract | Animal feeding operations in the United States produce more than 500 million tons of manure annually. Disposal of poultry waste via application as fertilizer results in substantial runoff of poultry litter-associated contaminants (PLAC). Of particular concern are sex steroids, 17ß-estradiol, estrone and testosterone, responsible for sex differentiation and development of reproductive structures. In a series of laboratory assays, mature male and mixed-sex larval/juvenile fish were continuously exposed to environmentally relevant PLAC solutions. Effects on gonads were assessed histologically, and vitellogenin (VTG) induction was measured as a gauge of estrogenicity. Twenty-one-day exposures to laboratory-generated PLAC solutions routinely induced VTG in mature male Pimephales promelas. Vitellogenesis in Fundulus heteroclitus only occurred at the highest tested PLAC concentration, and Cyprinodon variegatus were unresponsive at any tested concentration. All species produced considerable VTG in response to a 17ß-estradiol-positive control. A pronounced feminization was seen in P. promelas when exposed to PLAC as larvae but not when exposed as juveniles. Runoff from a poultry litter-amended field cropped under standard agronomic practices induced significant VTG in male P. promelas. Results indicate that environmentally relevant PLAC concentrations exhibit endocrine activity sufficient to induce VTG production in male fish and possibly affect sex ratios in resident fish populations. |
| File Format | HTM / HTML |
| ISSN | 07307268 |
| Issue Number | 10 |
| Volume Number | 29 |
| e-ISSN | 15528618 |
| Journal | Environmental Toxicology and Chemistry |
| Language | English |
| Publisher | Wiley |
| Publisher Date | 2010-10-01 |
| Publisher Place | United States |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Research Support, U.s. Gov't, Non-p.h.s. Research Support, Non-u.s. Gov't Species Specificity Toxicity Poultry Discipline Environmental Health Discipline Toxicology Male Drug Effects Endocrine Disruptors Journal Article Animals Bivalvia Discipline Chemistry Female Cyprinidae Gonads |
| Content Type | Text |
| Resource Type | Article |
| Subject | Environmental Chemistry Health, Toxicology and Mutagenesis |
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