Fluoxetine Results in Misleading Conclusions on Fish Behavior

Overview

Journal Ecol Evol

Date 2021 Jul 26

PMID 34306656

Citations 1

Authors

Malgorzata Grzesiuk

Alicja Pawelec

Affiliations

Soon will be listed here.

Abstract

Fluoxetine is an antidepressant medicine causing relaxation and mood improvement in people, with silencing certain personality traits in some cases. The question arise if such phenomena can be observed in nontarget organisms such as fish. Fluoxetine affects fishes behavior; however, it is not known if the medicine affects its "personality." This study aimed to evaluate the reaction of the invasive and native individuals to fluoxetine at environmental concentration of 360 ng/L. We prepared three variants of the experiments: (a) behavioral trials with unexposed fishes, (b) behavioral trials with the same fishes after 21 days of fluoxetine exposure, and (c) behavioral trials with the same fishes after 21-day depuration period, that is, without fluoxetine. The fishes reaction time (RT), that is, difference in time spent on reaching food with and without the necessity of overcoming the obstacle, was analyzed. Additionally, the personality, bold or shy, traits of each fish individual, was assigned. The results indicated that environmental concentrations of the antidepressant influenced RT. The average RT of the fishes cultured with fluoxetine was by 7-min shorter in comparison with the nonexposed control. Share of individuals exposed to fluoxetine assigned as bold raised to 71.4% in comparison with 46.4% in nonexposed control. This sheds new light on wild fishes behavior caught from freshwater. Environmental concentrations of the antidepressant influenced the time of fishes reaction and share individuals assigned as bold. Moreover, 21-day recovery lasting might be not enough to get fluoxetine effect on fishes.

Citing Articles

Fluoxetine results in misleading conclusions on fish behavior.

Grzesiuk M, Pawelec A Ecol Evol. 2021; 11(14):9707-9714.

PMID: 34306656 PMC: 8293709. DOI: 10.1002/ece3.7797.

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