Transcriptomic profiles of consistent risk-taking behaviour across time and contexts in European sea bass

Type Article
Date 2022-05
Language English
Author(s) Sadoul BastienORCID1, 2, Alfonso SebastienORCID1, 3, Goold ConorORCID4, Pratlong MarineORCID5, Rialle Stéphanie5, Geffroy BenjaminORCID1, Bégout Marie-LaureORCID1
Affiliation(s) 1 : MARBEC, University of Montpellier, CNRS, Ifremer, IRD, Palavas-Les-Flots, France
2 : DECOD, Ecosystem Dynamics and Sustainability, Institut Agro, Ifremer, INRAE, Rennes, France
3 : COISPA Technology and Research, Experimental Station for the Study of Sea Resources, Bari, Italy
4 : Faculty of Biological Sciences, University of Leeds, LS2 9JT, UK
5 : MGX-Montpellier GenomiX, University of Montpellier, CNRS, INSERM, Montpellier, France
Source Proceedings Of The Royal Society B-biological Sciences (0962-8452) (The Royal Society), 2022-05 , Vol. 289 , N. 1975 , P. 20220399 (10p.)
DOI 10.1098/rspb.2022.0399
WOS© Times Cited 4
Keyword(s) coping style, behavioural syndrome, fish, personality, anti-predator behaviour, intra-individual variability

Bolder individuals have greater access to food sources and reproductive partners but are also at increased risk of predation. Boldness is believed to be consistent across time and contexts, but few studies have investigated the stability of this trait across variable environments, such as varying stress loads or long periods of time. Moreover, the underlying molecular components of boldness are poorly studied. Here, we report that boldness of 1154 European sea bass, evaluated using group risk-taking tests, is consistent over seven months and for individuals subjected to multiple environments, including a chronically stressful environment. Differences in risk-taking behaviour were further supported by differences observed in the responses to a novel environment test: shy individuals displayed more group dispersion, more thigmotaxic behaviour and lower activity levels. Transcriptomic analyses performed on extreme phenotypes revealed that bold individuals display greater expression for genes involved in social and exploration behaviours, and memory in the pituitary, and genes involved in immunity and responses to stimuli in the head kidney. This study demonstrates that personality traits come with an underpinning molecular signature, especially in organs involved in the endocrine and immune systems. As such, our results help to depict state–behaviour feedback mechanisms, previously proposed as key in shaping animal personality.

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Sadoul Bastien, Alfonso Sebastien, Goold Conor, Pratlong Marine, Rialle Stéphanie, Geffroy Benjamin, Bégout Marie-Laure (2022). Transcriptomic profiles of consistent risk-taking behaviour across time and contexts in European sea bass. Proceedings Of The Royal Society B-biological Sciences, 289(1975), 20220399 (10p.). Publisher's official version : , Open Access version :