Authors: Hannah Gracy, Faith Lambert, Chris Vulpe
Faculty Mentor: Faith Lambert
College: College of Veterinary Medicine
Organic ultraviolet filters (UV-Fs) are a source of growing concern in the field of ecotoxicology due to their ability to mimic estrogens. They are commonly found in sunscreens and other personal care products (PCPs). UV-Fs enter the aquatic environment when a person who has applied a UV-F-containing PCP enters a natural body of water. The three UV-F compounds we analyzed in this study have been established as endocrine disruptors in vertebrates: benzophenone 3 (BP3), 4-methylbenzylidene camphor (4MBC), and octyl methoxycinnamate (OMC). However, their impact on invertebrates has not been well-studied. The goal of this study was to determine the effects of these three chemicals on the swimming speed and body length of Daphnia magna, a common model organism. After performing a 21-day chronic assay, a behavioral assay, and subsequent body length measurements, we determined that D. magna neonates that were exposed to BP3 and 4MBC were significantly slower and shorter than unexposed neonates. Neonates exposed to OMC did not differ significantly from controls. These results illustrate how exposure to UV-Fs could make D. magna more vulnerable to predation and less capable of competing for resources. As D. magna are common model organisms, these results could be generalized to larger crustaceans.