Behavioural and transgenerational effects of artificial light at night (ALAN) of varying spectral compositions in zebrafish (Danio rerio)

Short wavelengths (365 to 470 nm) of artificial light at night are associated with increased anxiety-like behavior in zebrafish.

• Exposure to short wavelengths of artificial light at night resulted in zebrafish displaying more anxiety-like behaviors after fewer nights compared to other wavelengths.
• Zebrafish in groups exhibited heightened anxiety-like behavior with increased exposure to short wavelength light.
• F1 offspring from mothers exposed to artificial light at night showed reduced movement frequency and shorter distances moved, despite never being directly exposed to the light.
• The findings suggest both immediate and transgenerational effects of artificial light at night on zebrafish behavior.

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