title: Influence of exposure in ovo to different light wavelengths on the lateralization of social response in zebrafish larvae.
abstract: Exposure of the chick embryo to different wavelengths of light of the same intensity has shown that only certain wavelengths may be important in generating visual asymmetries. This study aimed to detect the possible influence of different wavelengths of light on development of asymmetry of social recognition in zebrafish larvae, tested using the fish's mirror image as the stimulus. From fertilization until day 10 post-hatching zebrafish were kept in five different lighting conditions: natural light/dark (LD) cycle, complete darkness (DD), and artificial LD cycles with 14 h of monochromatic light (red, green, or violet light) and 10 h of darkness (rLD 14:10, gLD 14:10, vLD 14:10, respectively). On day 10 after hatching, the zebrafish larvae were subjected to a mirror test. A preference for using the left eye to scrutinize their mirror image was apparent only in zebrafish larvae exposed to and reared under a natural LD cycle, and not following exposure to any of other lighting conditions. These results are discussed with reference to other evidence of brain lateralization.
authors.affiliation: Center for Mind/Brain Sciences (CIMeC), University of Trento, Piazza Manifattura 1, Borgo Sacco, 38068 Rovereto (Trento), Italy; Department of Psychology and Cognitive Science, University of Trento, C.so Bettini 31, 38068 Rovereto (Trento), Italy. Electronic address: valeriaanna.sovrano@unitn.it.
authors.forename: Valeria Anna
authors.initials: VA
authors.lastname: Sovrano
authors.affiliation: Department of Life Sciences and Biotechnology, University of Ferrara, Via Luigi Borsari 46, 44121 Ferrara, Italy.
authors.forename: Cristiano
authors.initials: C
authors.lastname: Bertolucci
authors.affiliation: Department of Life Sciences and Biotechnology, University of Ferrara, Via Luigi Borsari 46, 44121 Ferrara, Italy.
authors.forename: Elena
authors.initials: E
authors.lastname: Frigato
authors.affiliation: Department of Life Sciences and Biotechnology, University of Ferrara, Via Luigi Borsari 46, 44121 Ferrara, Italy.
authors.forename: Augusto
authors.initials: A
authors.lastname: Foà
authors.affiliation: Centre for Neuroscience and Animal Behaviour, School of Science and Technology, University of New England, Armidale, NSW 2351, Australia.
authors.forename: Lesley J
authors.initials: LJ
authors.lastname: Rogers
mesh_terms: D000818:Animals; D004625:Embryo, Nonmammalian; D005123:Eye; D007839:Functional Laterality / Q000502:physiology*; D007814:Larva / Q000254:growth & development*; D008027:Light; D009799:Ocular Physiological Phenomena / Q000528:radiation effects; D010063:Ovum / Q000528:radiation effects*; D017440:Photoperiod; D014795:Visual Pathways / Q000254:growth & development / Q000502:physiology; D015027:Zebrafish
keywords: Development; Eye use; Lateralisation; Light exposure; Wavelengths; Zebrafish larvae