Is Heightened-Shoaling a Good Candidate for Positive Emotional Behavior in Zebrafish?

Animals : an Open Access Journal From MDPI
Becca FranksMarina A G von Keyserlingk

Abstract

Zebrafish, a highly-social species of freshwater fish, are widely studied across many fields of laboratory science including developmental biology, neuroscience, and genomics. Nevertheless, as standard housing for zebrafish typically consists of small and simplistic environments, less is known about their social behavioral repertoire in more naturalistic settings. In particular, spontaneously occurring, socio-positive affiliative behaviors (e.g., social coordination and cohesion) that may be indicative of positive emotional experiences have rarely been reported or studied deliberately in zebrafish. Housing adult zebrafish (10 fish/tank) in large semi-natural tanks (110 L; n = 6) with sloping gravel substrate, rocks, and artificial plants, we observed a previously undescribed behavior: Distinct periods of spontaneous, synchronized, compact aggregations, what we call "heightened-shoaling". This project aimed to quantify the characteristics of this distinctive behavior and compare parameters of heightened-shoaling to baseline periods (normal behavior) and pre-feed periods (feed-anticipatory behavior). First, across 4 days, we selected video-clips (100 s each) from within (i) instances of heightened-shoaling (n = 9), (ii) baseline ...Continue Reading

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Citations

Sep 10, 2020·Animals : an Open Access Journal From MDPI·Walter Sánchez-SuárezLauri Torgerson-White
Apr 4, 2021·Animals : an Open Access Journal From MDPI·Isabel Fife-Cook, Becca Franks
Jan 5, 2022·Biological Reviews of the Cambridge Philosophical Society·Carole J LeeCharles R Tyler

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