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Monday, February 6 • 2:20pm - 2:40pm
Technical Session. Reproductive Health of Three Catostomidae Species in a Wastewater Treatment Effluent Impacted River

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AUTHORS: Bethany Hoster, Karen Gaines, Eric Bollinger, Anabela Maia, Robert Colombo — Eastern Illinois University

ABSTRACT: As a result of human activity, wastewater treatment effluent and river impoundment have the potential to alter the water quality and flow regimes of rivers. During periods when river discharge is low, wastewater can make up the majority of a river’s composition downstream of an effluent. The Sangamon River, located in central Illinois, is impounded in Decatur, IL and receives effluent from the Sanitary District of Decatur. Previous research has found water quality in the Sangamon River differs significantly downstream of the Sanitary District of Decatur effluent when river discharge is below 200 cubic feet per second. The Sanitary District of Decatur serves 100,000 people, in addition to two hospitals and several industrial users. Due to the presence of endocrine disrupting compounds in municipal wastewater and phytoestrogens in industrial wastewater, the reproductive health of male fishes was investigated in the Sangamon River in comparison to a stretch of the Embarras River not impacted by wastewater treatment effluent. River Carpsucker (Carpiodes carpio), Shorthead Redhorse (Moxostoma macrolepidotum), and Smallmouth Buffalo (Ictiobus bubalus) were sampled in 2016 to determine if reproductive health varied between rivers due to the presence of wastewater treatment effluent. Gonadosomatic index and relative weight were used to determine the condition of these fishes. Shorthead Redhorse from the Embarras River had higher gonadosomatic index values and were in better reproductive condition than those from the Sangamon River, but there was no difference in relative weight. No differences in gonadosomatic index were found for River Carpsucker or Smallmouth Buffalo, but fishes from the Embarras River had significantly higher relative weights. Additional analyses to further determine reproductive health of these species and the effects of wastewater treatment effluent will include the evaluation of sex ratios, blood vitellogenin levels in male fish, and presence of testicular oocytes.

Monday February 6, 2017 2:20pm - 2:40pm CST
Grand Ballroom C

Attendees (5)