Toxicity Assessment of the Antimicrobial Triclocarban Using Sub-Lethal Behaviour and Reproduction Endpoints

Abstract

Aquatic environments have long been used as disposal sites for domestic and industrial wastes, resulting in increasing chemical contamination, decreased water quality, and concern for ecosystem health and drinking water sources. This study utilized bioassays, the "golden standard" method to measure biological impact, to assess the toxicity of the widely found surface water contaminant, the antimicrobial triclocarban. Culturing protocols were implemented to provide healthy, age-synchronized organisms for bioassays. Behaviour and reproduction were demonstrated as useful endpoints while refining these methods using 4-chlorophenol and were successfully implemented in the toxicity assessment of triclocarban. While no sub-lethal behavioural impact was seen, 10.0 ppb triclocarban was found to delay reproduction in

Assessing the Potential Impacts of Untreated Greywater Irrigation on Select Terrestrial Organisms: Brassica Rapa, Eisenia Andrei, Folsomia Candida

“…The use of Daphnia magna and Hyalella azteca in ecotoxicological studies is widely accepted as the aquatic zooplankton are deemed plentiful, are keystone species of aquatic ecosystems, and have the support of government scientific bodies such as Environment Canada (Environment Canada, 1996;Environment and Climate Change Canada, 2017). For example, Raby (2013) investigated the impacts of triclocarban on D. magna and H. azteca using behavioural and reproductive endpoints.…”