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Monday, February 6 • 2:40pm - 3:00pm
Technical Session. Multi-Generational Exposure of Fathead Minnows to a Complex Urban Mixture of Contaminants of Emerging Concern

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AUTHORS: Lina Wang, Utku Hasaby, Josh Robinson, Heiko Schoenfuss - St. Cloud State Aquatic Toxicology Laboratory

ABSTRACT: In many Great Lake tributaries, complex mixtures of contaminants of emerging concern (CECs)are found. Using existing analytical data, the current study assessed how an urban derived complex mixture of CECs affected three generations of fathead minnows (Pimephales promelas), exposed continuously under controlled laboratory conditions. Larval and mature minnows were exposed to a mixture comprised of: Galaxolide (synthetic musk), TBEP (plasticizer), Estrone, Bisphenol-A (Plasticizer), DEET, Methyl-1H-benzotriazole (anti-icing agent), Desvenlafaxine (anti-depressant), Fexofenadine (antihistamine), Metformin (anti-diabetic), and Nonylphenol, at low (1/10th environmental), medium (environmental), and high (10x environmental) concentrations. F1 fish were exposed while sexually mature and produced F2 generation fathead minnows that were exposed throughout their entire life cycle. F3 generation fish were exposed during early development. Multiple endpoints were measured to assess the effects of the urban mixture on fish health and development. F1 male minnows exposed to the urban CEC mixture had higher plasma vitellogenin concentrations than control fish (mean: 2.73 ug/mL and 1.91 ug/mL respectively, p< 0.05). Exposure did not have a significant effect on male feeding performance, but it did reduce female feeding performance in the medium and high treatments (p= 0.01 and 0.03). F2 larvae had a greater predator avoidance escape angle when exposed to any mixture (p-values: 0.01, 0.02, 0.03). F2 larvae exposed to the high concentration were also smaller (p=0.01). The direct impact of reduced feeding efficiency and alteration in apical endpoints central to sustaining fish populations confirms that complex urban CEC mixtures can adversely affect fish populations.

Monday February 6, 2017 2:40pm - 3:00pm CST
Grand Ballroom C

Attendees (3)