Low repeatability of aversive learning in zebrafish (Danio rerio)
| Autor: | Rose E. O'Dea, Dominic Mason, Daniel Hesselson, Susanne Zajitschek, Shinichi Nakagawa, Hamza Anwer |
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| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
medicine.medical_specialty Physiology Stability (learning theory) Danio Audiology Aquatic Science 010603 evolutionary biology 01 natural sciences Correlation 03 medical and health sciences medicine Animals Learning Animal species Molecular Biology Zebrafish Ecology Evolution Behavior and Systematics 030304 developmental biology QL 0303 health sciences Behavior Animal biology Directional selection Contrast (statistics) Cognition Repeatability biology.organism_classification Insect Science Trait Conditioning Animal Science and Zoology Neuroscience |
| Zdroj: | Journal of Experimental Biology. 224 |
| ISSN: | 1477-9145 0022-0949 |
| Popis: | Aversive learning – avoiding certain situations based on negative experiences – can profoundly increase fitness in animal species. The extent to which this cognitive mechanism could evolve depends upon individual differences in aversive learning being stable through time, and heritable across generations, yet no published study has quantified the stability of individual differences in aversive learning using the repeatability statistic, R (also known as the intra-class correlation). We assessed the repeatability of aversive learning by conditioning approximately 100 zebrafish (Danio rerio) to avoid a colour cue associated with a mild electric shock. Across eight different colour conditions zebrafish did not show consistent individual differences in aversive learning (R = 0.04). Within conditions, when zebrafish were twice conditioned to the same colour, blue conditioning was more repeatable than green conditioning (R = 0.15 and R = 0.02). In contrast to the low repeatability estimates for aversive learning, zebrafish showed moderately consistent individual differences in colour preference during the baseline period (i.e. prior to aversive conditioning; R ~ 0.45). Overall, aversive learning responses of zebrafish were weak and variable (difference in time spent near the aversive cue Summary StatementZebrafish exhibit low repeatability (intra-class correlation) in an aversive learning assay possibly due to past selection pressure exhausting genetic variance in this learning trait. |
| Databáze: | OpenAIRE |
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