This is a Preprint and has not been peer reviewed. This is version 5 of this Preprint.
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Abstract
Behavioural lateralisation, defined as the asymmetric expression of cognitive functions, is reported to enhance key fitness-relevant traits such as predator escape performance, multitasking abilities, and group coordination. Therefore, studies reporting negative effects on lateralisation in fish due to environmental stressors such as ocean acidification, hypoxia, and pollutants are worrisome. However, such studies have focussed on population-level measures, without validating whether lateralisation is consistent within individuals across time. We conducted a multi-species, international assessment of the repeatability (R) of lateralisation in four previously studied fish species using the common detour test, and re-analysed a published dataset (on guppies) using new statistical methods. We expected the three shoaling species to exhibit greater within-individual consistency in lateralisation than their non-shoaling counterparts given previous reports of stronger lateralisation in group-living fishes. However, both absolute and relative lateralisation scores were highly non-repeatable in all five species (0.01
DOI
https://doi.org/10.32942/osf.io/6kcwa
Subjects
Behavior and Ethology, Ecology and Evolutionary Biology, Life Sciences
Keywords
Behavioural plasticity, Ctenolabrus rupestris, Danio rerio, laterality, lateralization, Neopomacentrus azysron, Poecilia reticulata, Pomacentrus amboinensis, Repeatability, T-maze
Dates
Published: 2019-01-29 08:34
Last Updated: 2020-04-08 10:19
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