Additionally, embryos that received high-UVR exposure showed a trend for decreased mass (albeit not statistically significant), which may have resulted in less musculature to break free from the egg mechanically.
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Under control conditions, there is a decreasing trend, albeit non-significant (10% decrease; HPDI lower =−0.0048, HPDI upper =0.25; Fig. 2B ), in yolk sac volume between 2 and 5 dpf as the embryo absorbs the yolk to develop tissue and organ systems ( Salis et al., 2021 ).