Volta

Exposure to the Oestrogenic Pollutant 17α‐Ethinyl Estradiol ( EE2 ) Does Not Alter the Behaviour of a Coastal Marine Fish, Cristiceps australis

ABSTRACT Escalating production and consumption of medications globally has led to a sharp rise in environmental contamination with pharmaceuticals—including 17α‐ethinyl estradiol (EE2), a synthetic oestrogen used in the contraceptive pill. EE2 is now commonly detected in various ecosystems and poses risks to wildlife. Although its effects on behavioural traits are well‐documented, available data are restricted to a handful of model organisms. Therefore, the generality of such effects has not been widely considered, particularly for marine fishes. Accordingly, we investigated the effects of environmentally relevant EE2 concentrations on boldness and anxiety in a marine fish, the southern crested weedfish ( Cristiceps australis ). Weedfishes inhabit shallow coastal waters, which are often contaminated with EE2, and rely on vegetation for predator avoidance. …

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