Ten-week exposure to treated sewage discharge has relatively minor, variable effects on reproductive behavior and sperm production in goldfish

Ten-week exposure to treated sewage discharge has relatively minor, variable effects on reproductive behavior and sperm production in goldfish

2002

It is well established that effluent from many sewage treatment plants (STPs) possesses estrogenic properties; however, the biological significance of this estrogenicity to fish reproductive behavior and sperm production is unknown. This study tested the hypothesis that 10-week exposure to a STP effluent with well-established estrogenic properties compromises the reproductive vigor of mature goldfish by decreasing the intensity of their reproductive drive and sperm production. Male goldfish were exposed for 10 weeks to one of four treatments: well water, a solvent control, 50 ng/L estradiol (E2), or undiluted effluent from a major metropolitan STP. Two trials were conducted, one in the winter and one in the summer when the effluent was chlorinated. Exposure to effluent in both the summer and winter trials induced small, but nonsignificant, decreases in the frequency of male spawning behaviors but had no effect on sperm production. Exposure to E2 caused a clear reduction in spawning behavior in one trial while causing reduced sperm production in both trials. We conclude that the effect of effluent exposure from this STP on adult fish is likely to be relatively minor and that the effluent's estrogenic properties may vary over the course of the year.

Schoenfuss, Heiko L.
Levitt, James T.
Van Der Kraak, Glen
Sorensen, Peter W.

St. Cloud State University
U of MN 1980 Folwell Ave St Paul, MN 55108 Phone: (612) 624-4997 Email: soren003@umn.edu Web: http://fwcb.cfans.umn.edu/sorensen/

5

Agricultural Drainage

sewage
Wastewater
Waste water
waste-water
wastewaters
Wastewater treatment
Wastewater treatments
waste water treatment
waste water treatments
waste-water treatments
sewage treatment plant
sewage treatment plants
sperm
estrogen
fish
fishes
fish health

2000-2009

Yes

Do Not Have Copyright Permission

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