Heavy Fishing Altering Pearly Razorfish at Molecular Level, Study Finds
A new study has found that intensive fishing may be causing molecular-level changes in pearly razorfish, a species that is born female and later transitions to male. Researchers detected no significant alterations in the fish's DNA itself, but identified differences in DNA methylation, an epigenetic process that influences how genes are expressed. These changes suggest that fishing pressure may be affecting the fish beyond simple population reduction. The study also highlighted the role of marine reserves in protecting larger, older fish and sustaining greater genetic diversity within populations.
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