Document Type

Thesis

Degree Name

Master of Science (MSc)

Department

Biology

Program Name/Specialization

Integrative Biology

Faculty/School

Faculty of Science

First Advisor

Dr. Tristan A.F. Long

Advisor Role

Primary academic advisor

Abstract

Blue light, the wavelengths ranging from ~400-500 nm, is emitted from the sun and more recently, by artificial lights including those in technology. In humans, prolonged exposure to blue light has been consistently linked to circadian rhythm disruption and retinal damage, and has also been associated with changes in neurodegeneration, aging, mortality, and oxidative stress in model organisms. This thesis explores the multifaceted effects of blue light exposure through two independent but complementary approaches. An initial rapid review of the current state of knowledge on blue light induced oxidative stress in humans was conducted. This revealed that the most studied topics in this context were the use of blue light in treatments, and the damage that it can cause, particularly in eyes, skin, and cancer. It also highlighted a key research gap in both humans and model species: a lack of studies investigating the effects of blue light on mating behaviours and reproduction. To begin addressing these gaps, the second component of this thesis outlines an experimental investigation of blue light exposure in Drosophila melanogaster, focusing on mating behaviours, reproductive outputs, and locomotory abilities. In this study, male and female flies of various ages were exposed to white, blue, or red light, and were assessed for mating rates, latencies, durations, offspring production, egg size, and climbing performance. Results showed that intermediate durations of blue light exposure had significant effects on male and female flies, especially in mating latencies, offspring production, and climbing speed. Together, the results from these two studies add to the growing body of research on the potential effects of long term blue light exposure and highlight directions for future research into blue light induced oxidative stress.

Convocation Year

2025

Convocation Season

Fall

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