Dolphins living near the area where the Deepwater Horizon oil spill occurred in 2010 had alterations in gene activity that could signal future disease
were staggering, with fish, birds and marine animals dying in huge numbers. But the long-term consequences of the spill on wildlife are less understood, which led Morey to investigate how common bottlenose dolphins were faring.She and her team analysed the health records and blood samples of 71 wild dolphins captured and released between 2013 and 2018.
The analysis revealed thousands of differences in gene expression in animals in the disaster region compared with those outside the affected area. The gene, which is linked to declining lung health in humans, was expressed 8.2 times higher in dolphins that lived through the disaster than in those born after.
The greatest differences in gene expression were seen in animals studied in 2013, the date closest to the disaster. While the researchers were able to draw preliminary links between changes in gene expression and physical health symptoms, they caution that their sample size is small. They also note the difficulty of isolating the damage caused by the spill from damage that may be due to other
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