Genetic Diversity in Commercial Danio rerio and Its Implications for Ecotoxicology.

The zebrafish (Danio rerio) is a widely used aquatic model organism. However, fish from confined groups may experience inbreeding and loss of heterozygosity, which could affect biological responses and research outcomes. Therefore, we aimed to investigate the genetic differences among zebrafish populations from different commercial suppliers and assess their influence on responses to copper exposure.