Response to change in the number of visual stimuli in zebrafish:A behavioural and molecular study

Evidence has shown that a variety of vertebrates, including fish, can discriminate collections of visual items on the basis of their numerousness using an evolutionarily conserved system for approximating numerical magnitude (the so-called Approximate Number System, ANS). Here we combine a habituati...

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Veröffentlicht in:Scientific reports 2020-04, Vol.10 (1), p.5769-5769, Article 5769
Hauptverfasser: Messina, Andrea, Potrich, Davide, Schiona, Ilaria, Sovrano, Valeria Anna, Fraser, Scott E., Brennan, Caroline H., Vallortigara, Giorgio
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container_title Scientific reports
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creator Messina, Andrea
Potrich, Davide
Schiona, Ilaria
Sovrano, Valeria Anna
Fraser, Scott E.
Brennan, Caroline H.
Vallortigara, Giorgio
description Evidence has shown that a variety of vertebrates, including fish, can discriminate collections of visual items on the basis of their numerousness using an evolutionarily conserved system for approximating numerical magnitude (the so-called Approximate Number System, ANS). Here we combine a habituation/dishabituation behavioural task with molecular biology assays to start investigating the neural bases of the ANS in zebrafish. Separate groups of zebrafish underwent a habituation phase with a set of 3 or 9 small red dots, associated with a food reward. The dots changed in size, position and density from trial to trial but maintained their numerousness, and the overall areas of the stimuli was kept constant. During the subsequent dishabituation test, zebrafish faced a change (i) in number (from 3 to 9 or vice versa with the same overall surface), or (ii) in shape (with the same overall surface and number), or (iii) in size (with the same shape and number). A control group of zebrafish was shown the same stimuli as during the habituation. RT-qPCR revealed that the telencephalon and thalamus were characterized by the most consistent modulation of the expression of the immediate early genes c-fos and egr-1 upon change in numerousness; in contrast, the retina and optic tectum responded mainly to changes in stimulus size.
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subjects 38
38/77
631/337
631/378/2649
64
64/116
Animals
c-Fos protein
Danio rerio
Discrimination Learning
EGR-1 protein
Genes, Immediate-Early
Habituation
Habituation, Psychophysiologic
Humanities and Social Sciences
Immediate-early proteins
Male
Molecular biology
multidisciplinary
Number systems
Photic Stimulation
Reinforcement
Retina
Science
Science (multidisciplinary)
Superior Colliculi - physiology
Superior colliculus
Telencephalon
Telencephalon - physiology
Thalamus
Thalamus - physiology
Visual Perception
Visual stimuli
Zebrafish
Zebrafish - genetics
Zebrafish - physiology
title Response to change in the number of visual stimuli in zebrafish:A behavioural and molecular study
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