Journal
ROYAL SOCIETY OPEN SCIENCE
Volume 4, Issue 2, Pages -Publisher
ROYAL SOC
DOI: 10.1098/rsos.160791
Keywords
acoustic tracking; circadian clocks; behavioural syndrome; chronotypes; hidden Markov models; repeatability
Categories
Funding
- Spanish Ministry of Economy and Competiveness [CTM2015-69126-C2-1-R, FJCI-2014-21239]
- FPU predoctoral fellowship from the Spanish Ministry of Education, Culture and Sports (MECD) [FPU13/01440]
Ask authors/readers for more resources
Repeatable between-individual differences in the behavioural manifestation of underlying circadian rhythms determine chronotypes in humans and terrestrial animals. Here, we have repeatedly measured three circadian behaviours, awakening time, rest onset and rest duration, in the free-ranging pearly razorfish, Xyrithchys novacula, facilitated by acoustic tracking technology and hidden Markov models. In addition, daily travelled distance, a standard measure of daily activity as fish personality trait, was repeatedly assessed using a State-Space Model. We have decomposed the variance of these four behavioural traits using linear mixed models and estimated repeatability scores (R) while controlling for environmental co-variates: year of experimentation, spatial location of the activity, fish size and gender and their interactions. Between-and within-individual variance decomposition revealed significant Rs in all traits suggesting high predictability of individual circadian behavioural variation and the existence of chronotypes. The decomposition of the correlations among chronotypes and the personality trait studied here into between-and within-individual correlations did not reveal any significant correlation at between-individual level. We therefore propose circadian behavioural variation as an independent axis of the fish personality, and the study of chronotypes and their consequences as a novel dimension in understanding within-species fish behavioural diversity.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available