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Behavioural effects of psychoactive pharmaceutical exposure on European perch (Perca fluviatilis) in a multi-stressor environment
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för ekologi, miljö och geovetenskap.
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Kemiska institutionen.ORCID-id: 0000-0002-3949-7371
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2019 (engelsk)Inngår i: Science of the Total Environment, ISSN 0048-9697, E-ISSN 1879-1026, Vol. 655, s. 1311-1320Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

With the ability to resist biodegradation and exert therapeutic effects at low concentrations, pharmaceutical contaminants have become environmental stressors for wildlife. One such contaminant is the anxiolytic oxazepam, a psychoactive pharmaceutical that is frequently detected in surface waters globally. Despite growing interest in understanding how wildlife respond to anxiolytics, synergistic effects of pharmaceuticals and other abiotic (e.g. temperature) and biotic (e.g. predation risk) stressors remain unclear. Here, using a multi-stressor approach, we investigated effects of 7-day oxazepam exposure (6.5 μg/L) on anxiety-related behaviours in juvenile European perch (Perca fluviatilis). The multi-stressor approach was achieved by exposing perch to oxazepam at two temperatures (10 °C and 18 °C), and at two predation risk regimes—generated using chemical cues from the northern pike (Esox lucius). Our exposures resulted in a successful uptake of the drug from the water, i.e., oxazepam was measured in perch muscle tissue at 50 ± 17 ng/g (mean ± SD). We found significant oxazepam-induced effects on boldness, with 76.7% of the treated fish entering the white background (i.e. ‘exposed’ area where exposure to presumed risks are higher) within the first 5 min, compared to 66.6% of the control fish. We also found a significant effect of temperature on total time spent freezing (i.e. staying motionless). Specifically, fish in the low temperature treatments (oxazepam, predation) froze for longer than fish in high temperatures. Our multi-stressor study is the first to uncover how anxiety-related behaviours in wild juvenile fish are altered by changes in water temperature and perceived predation risk. Importantly, our findings highlight the need to focus on multiple stressors to improve understanding of how organisms not only survive, but adapt to, human-induced environmental change.

sted, utgiver, år, opplag, sider
Elsevier, 2019. Vol. 655, s. 1311-1320
Emneord [en]
Anti-predator behaviour, Behavioural ecotoxicology, Oxazepam, Pharmaceuticals, Temperature effect
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Identifikatorer
URN: urn:nbn:se:umu:diva-155752DOI: 10.1016/j.scitotenv.2018.11.228ISI: 000455034600127PubMedID: 30577123OAI: oai:DiVA.org:umu-155752DiVA, id: diva2:1283213
Forskningsfinansiär
Swedish Research Council Formas, 2013-4431Tilgjengelig fra: 2019-01-28 Laget: 2019-01-28 Sist oppdatert: 2020-02-03bibliografisk kontrollert

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Lagesson, AnnelieFick, JerkerKlaminder, JonatanBrodin, Tomas

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