BUSCADOR RECOLECTA

Digital.CSIC. Repositorio Institucional del CSIC

oai:digital.csic.es:10261/339297

Chronotypes, the individual differences in daily activity timing, have profound associations with numerous physiological processes. Despite this, the covariance between chronotypes and other aspects of an individual's behaviour has been infrequently explored in non-human animals. This study delves into individual's variation across four axes of personality in a controlled environment, utilising the pearly razorfish, a model species for fish chronotype studies. We identified behavioural types across the aggressiveness continuum and established behavioural syndromes amongst exploration, activity, and boldness, irrespective of body size and condition. Subsequent to this, the experimental subjects were reintroduced to their natural habitat and individually tracked using high-resolution technology to ascertain their chronotypes. Our results revealed that whilst the exploration-activity-boldness syndrome bore no correlation with chronotypes, a significant association was observed between aggressiveness and chronotype. Hence, individuals with later awakening times and rest onsets were more aggressive than their counterparts with earlier awakening times and rest onsets. This study provides pioneering evidence linking fish chronotypes with other behavioural traits, such as aggressiveness, suggesting that behavioural variation could be potentially linked to the individuals' variation in internal clocks and the environmental variables influencing their expression., This work received funding from the CLOCKS I+D+i project (grant no. PID2019-104940GA-I00) funded by MCIN/AEI/10.13039/501100011033. This manuscript is a contribution of the Joint Research Unit IMEDEA-LIMIA. The present research was carried out within the framework of the activities of the Spanish Government through the "Maria de Maeztu Centre of Excellence" accreditation to IMEDEA (CSIC-UIB) (CEX2021-001198). The telemetry system for free-living tracking was financed by the German Federal Ministry of Education and Research (Grant No. #033W024A). Martina Martorell-Barceló was supported by an FPI predoctoral fellowship from the Direcció General de Innovació I Recerca of the Balearic Islands Government (ref. FPI/2167/2018). Eneko Aspillaga was supported by Margalida Comas (ref. PD/023/2018) and Vicenç Mut (PD/041/2021) Postdoctoral Grants from the Government of the Balearic Islands and the European Social Fund. Margarida Barcelo-Serra received funding from the European Union’s Horizon 2020 research and innovation program under the Marie Skłodowska-Curie grant agreement No. WildFishGenes-891404., With funding from the Spanish government through the "Severo Ochoa Centre of Excellence" accreditation (CEX2021-001198)., Peer reviewed