Field-realistic antidepressant exposure disrupts group foraging dynamics in fish

Jake M. Martin, Minna Saaristo, Hung Tan, Michael G. Bertram, Venkatesh Nagarajan Radha, Damian K Dowling, Bob B.M. Wong

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Psychoactive pollutants, such as antidepressants, are increasingly detected in the environment. Mounting evidence suggests that such pollutants can disrupt the behaviour of non-target species. Despite this, few studies have considered how the response of exposed organisms might be mediated by social context. To redress this, we investigated impacts of two environmentally realistic concentrations of a pervasive antidepressant pollutant, fluoxetine, on foraging behaviour in female mosquitofish (Gambusia holbrooki), tested individually or in a group. Fluoxetine did not alter behaviour of solitary fish. However, in a group setting, fluoxetine exposure disrupted the frequency of aggressive interactions and food consumption, with observed effects being contingent on both the mean weight of group members and the level of within-group variation in weight. Our results suggest that behavioural tests in social isolation may not accurately predict the environmental risk of chemical pollutants for group-living species, and highlight the potential for social context to mediate the effects of psychoactive pollutants in exposed wildlife.
Original languageEnglish
Number of pages22
JournalBiology Letters
Publication statusAccepted/In press - 2019

Cite this

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title = "Field-realistic antidepressant exposure disrupts group foraging dynamics in fish",
abstract = "Psychoactive pollutants, such as antidepressants, are increasingly detected in the environment. Mounting evidence suggests that such pollutants can disrupt the behaviour of non-target species. Despite this, few studies have considered how the response of exposed organisms might be mediated by social context. To redress this, we investigated impacts of two environmentally realistic concentrations of a pervasive antidepressant pollutant, fluoxetine, on foraging behaviour in female mosquitofish (Gambusia holbrooki), tested individually or in a group. Fluoxetine did not alter behaviour of solitary fish. However, in a group setting, fluoxetine exposure disrupted the frequency of aggressive interactions and food consumption, with observed effects being contingent on both the mean weight of group members and the level of within-group variation in weight. Our results suggest that behavioural tests in social isolation may not accurately predict the environmental risk of chemical pollutants for group-living species, and highlight the potential for social context to mediate the effects of psychoactive pollutants in exposed wildlife.",
author = "Martin, {Jake M.} and Minna Saaristo and Hung Tan and Bertram, {Michael G.} and {Nagarajan Radha}, Venkatesh and Dowling, {Damian K} and Wong, {Bob B.M.}",
year = "2019",
language = "English",
journal = "Biology Letters",
issn = "1744-9561",
publisher = "Royal Society, The",

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Field-realistic antidepressant exposure disrupts group foraging dynamics in fish. / Martin, Jake M.; Saaristo, Minna; Tan, Hung; Bertram, Michael G.; Nagarajan Radha, Venkatesh; Dowling, Damian K; Wong, Bob B.M.

In: Biology Letters, 2019.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Field-realistic antidepressant exposure disrupts group foraging dynamics in fish

AU - Martin, Jake M.

AU - Saaristo, Minna

AU - Tan, Hung

AU - Bertram, Michael G.

AU - Nagarajan Radha, Venkatesh

AU - Dowling, Damian K

AU - Wong, Bob B.M.

PY - 2019

Y1 - 2019

N2 - Psychoactive pollutants, such as antidepressants, are increasingly detected in the environment. Mounting evidence suggests that such pollutants can disrupt the behaviour of non-target species. Despite this, few studies have considered how the response of exposed organisms might be mediated by social context. To redress this, we investigated impacts of two environmentally realistic concentrations of a pervasive antidepressant pollutant, fluoxetine, on foraging behaviour in female mosquitofish (Gambusia holbrooki), tested individually or in a group. Fluoxetine did not alter behaviour of solitary fish. However, in a group setting, fluoxetine exposure disrupted the frequency of aggressive interactions and food consumption, with observed effects being contingent on both the mean weight of group members and the level of within-group variation in weight. Our results suggest that behavioural tests in social isolation may not accurately predict the environmental risk of chemical pollutants for group-living species, and highlight the potential for social context to mediate the effects of psychoactive pollutants in exposed wildlife.

AB - Psychoactive pollutants, such as antidepressants, are increasingly detected in the environment. Mounting evidence suggests that such pollutants can disrupt the behaviour of non-target species. Despite this, few studies have considered how the response of exposed organisms might be mediated by social context. To redress this, we investigated impacts of two environmentally realistic concentrations of a pervasive antidepressant pollutant, fluoxetine, on foraging behaviour in female mosquitofish (Gambusia holbrooki), tested individually or in a group. Fluoxetine did not alter behaviour of solitary fish. However, in a group setting, fluoxetine exposure disrupted the frequency of aggressive interactions and food consumption, with observed effects being contingent on both the mean weight of group members and the level of within-group variation in weight. Our results suggest that behavioural tests in social isolation may not accurately predict the environmental risk of chemical pollutants for group-living species, and highlight the potential for social context to mediate the effects of psychoactive pollutants in exposed wildlife.

M3 - Article

JO - Biology Letters

JF - Biology Letters

SN - 1744-9561

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