engleski

HudinaThe effects of three psychoactive compounds on behavior of the invasive signal crayfish, Pacifastacus leniusculus (Dana, 1852)

Invasive species and pollution are one of the dominant constituents of anthropogenic environmental disturbance with major economic and ecological impacts. However, the interactive effects of myrad of chemicals in aquatic environments on invasion rates and success are currently poorly understood. The aim of this study was to examine whether psychoactive compounds that are considered as contaminants of emerging concern and are ubiquitous in the Sava River (2 antidepressants and one illicit drug) could influence the behavior of the most successful invader of European freshwaters - the signal crayfish (Pacifastacus leniusuclus). Through a week-long trial, we exposed crayfish to i) environmental concentrations and ii) therapeutic concentrations of citalopram, nortryptiline and amphetamine and recorded their behaviors after 24 hours and a week-long exposure. We recorded specific parameters (velocity, distance moved, moving and non-moving cumulative duration) using EthoVision programme and compared the behavior of exposed crayfish to their respective size matched controls. Out of three analysed compounds, citalopram and amphetamine had a significant effect on crayfish activity but only after 7 day exposure. Overall, citalopram decreased while amphetamine increased cumulative duration of movement. We discuss our finding in the context of their potential effects on physiology and fitness of signal crayfish.

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