@article{fdi:010091976, title = {{N}eural mechanisms of mutualistic fish cleaning behaviour : a study in the wild}, author = {{R}omeo, {D}. and {R}amirez-{C}alero, {S}. and {R}avasi, {T}. and {R}odolfo-{M}etalpa, {R}iccardo and {S}chunter, {C}.}, editor = {}, language = {{ENG}}, abstract = {{O}ne crucial interaction for the health of fish communities in coral reefs is performed by cleaner fish by removing ectoparasites from the body of other fish, so-called clients. {S}tudying the underlying mechanisms of this behaviour is essential to understanding how species react to social stimuli and defining the drivers of mutualistic social behaviour. {H}ere, we pinpoint the neural molecular mechanisms in the cleaning behaviour of {L}abroides dimidiatus in the wild through an in situ interaction experiment at a coral reef in {N}ew {C}aledonia. {F}ive cleaners and clients ({A}budefduf saxatilis) were placed into underwater aquaria to interact, while five were not presented with a client. {T}he brain transcriptomes revealed 233 differentially expressed genes in cleaners that were interacting with a client. {A}mong these genes, grin2d, npy, slc6a3 and immediate early genes ({IEG}s; fosb and fosl1) were related to learning and memory, glutamate and dopamine pathways, which confirm molecular pathways observed in laboratory studies. {H}owever, a new potential mechanism was found with npy (neuropeptide {Y}) as a driver of feeding behaviour. {T}hese results show the role of neurotransmitters and {IEG}s in mutualistic social behaviour, unveiling the mechanism behind the feeding stimulus that leads the cleaner fish to establish mutualistic interactions in coral reefs.}, keywords = {mutualism ; cleaner fish ; brain transcriptome ; neuroethology ; cleaning ; behaviour ; {NOUVELLE} {CALEDONIE}}, booktitle = {}, journal = {{B}iology {L}etters}, volume = {20}, numero = {10}, pages = {20240339 [8 p.]}, ISSN = {1744-9561}, year = {2024}, DOI = {10.1098/rsbl.2024.0339}, URL = {https://www.documentation.ird.fr/hor/fdi:010091976}, }