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Tuesday, February 7 • 6:00pm - 9:00pm
Poster Display. Morphological Differences in Three Catostomidae Species Between Two Midwestern Rivers

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AUTHORS: Bethany Hoster, Eastern Illinois University; Robert Colombo, Eastern Illinois University

ABSTRACT: Around the world, municipal and industrial treatment effluents expose riverine organisms to mutagenic compounds. We tested the hypothesis that fishes in a stretch of river receiving municipal and industrial treatment effluent exhibit morphological abnormalities compared to fishes in a river without this type of point source pollution. The Sangamon River receives wastewater treatment effluent from the Sanitary District of Decatur containing a variety of endocrine disruptors, including estradiol and phytoestrogens, as well as soluble nickel. We used a reach of the Embarras River not impacted by wastewater treatment effluent as our reference area. In the study reach of the Sangamon River, abnormalities in fin morphology have been anecdotally observed in several Catostomidae species. To quantify these abnormalities, we measured standard and total lengths of all captured River Carpsucker (Carpiodes carpio), Smallmouth Buffalo (Ictiobus bubalus), and Shorthead Redhorse (Moxostoma macrolepidotum) to measure the length of the caudal fin and determine the total percent of the body length that this fin comprised. We found that River Carpsucker and Smallmouth Buffalo from the Sangamon River had caudal fins comprising a significantly higher percent of the total body length than individuals from the Embarras River. No difference was found for Shorthead Redhorse. Further morphometric analyses will be conducted to determine if any other morphological abnormalities are present in these fishes.

Tuesday February 7, 2017 6:00pm - 9:00pm
Lancaster Ballroom

Attendees (1)