Neurobiological and behavioural responses of cleaning mutualisms to ocean warming and acidification

Paula, José Ricardo, Repolho, Tiago, Pegado, Maria Rita, Thörnqvist,, Per-Ove, Bispo, Regina, Winberg, Svante, Munday, Philip L., and Rosa, Rui (2019) Neurobiological and behavioural responses of cleaning mutualisms to ocean warming and acidification. Scientific Reports, 9. 12728.

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Abstract

Cleaning interactions are textbook examples of mutualisms. On coral reefs, most fishes engage in cooperative interactions with cleaners fishes, where they benefit from ectoparasite reduction and ultimately stress relief. Furthermore, such interactions elicit beneficial effects on clients' ecophysiology. However, the potential effects of future ocean warming (OW) and acidification (OA) on these charismatic associations are unknown. Here we show that a 45-day acclimation period to OW (+3 degrees C) and OA (980 mu atm pCO(2)) decreased interactions between cleaner wrasses (Labroides dimidiatus) and clients (Naso elegans). Cleaners also invested more in the interactions by providing tactile stimulation under OA. Although this form of investment is typically used by cleaners to prolong interactions and reconcile after cheating, interaction time and client jolt rate (a correlate of dishonesty) were not affected by any stressor. In both partners, the dopaminergic (in all brain regions) and serotoninergic (forebrain) systems were significantly altered by these stressors. On the other hand, in cleaners, the interaction with warming ameliorated dopaminergic and serotonergic responses to OA. Dopamine and serotonin correlated positively with motivation to interact and cleaners interaction investment (tactile stimulation). We advocate that such neurobiological changes associated with cleaning behaviour may affect the maintenance of community structures on coral reefs.

Item ID: 60464
Item Type: Article (Research - C1)
ISSN: 2045-2322
Copyright Information: © The Author(s) 2019. Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
Funders: Fundação para a Ciência e Tecnologia (FCT), Portugal, Programa Operacional Regional de Lisboa, Portugal, European Union (EU)
Projects and Grants: project LISBOA-01-0145-FEDER-028609, FCT project MUTUALCHANGE - PTDC/MAR-EST/5880/2014, FCT project ASCEND - PTDC/BIA-BMA/28609/2017, FCT strategic project UID/MAR/04292/2013
Date Deposited: 25 Sep 2019 07:50
FoR Codes: 05 ENVIRONMENTAL SCIENCES > 0501 Ecological Applications > 050101 Ecological Impacts of Climate Change @ 100%
SEO Codes: 96 ENVIRONMENT > 9603 Climate and Climate Change > 960305 Ecosystem Adaptation to Climate Change @ 100%
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