Studying Mozambique tilapia, the researchers found that short DNA segments enhance expression of genes that regulate the fish's internal body chemistry in response to salinity stress. Photo by Greg Hume/Creative Commons
Studying Mozambique tilapia, the researchers found that short DNA segments enhance expression of genes that regulate the fish's internal body chemistry in response to salinity stress.

Genetic key to salt tolerance discovered in tilapia fish

DNA segments were found to enhance expression of genes regulating salinity stress response.

Most fish live either in freshwater or saltwater, but others, including tilapia, have the remarkable ability to physiologically adjust to varying salinity levels — a trait that may be critically important as climate change begins to alter the salinity of ocean and coastal waters as well as the water in desert lakes and creeks.

To better understand such environmental flexibility, researchers at the University of California-Davis have identified short DNA segments in tilapia that

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