The chronicles of the contaminated Mediterranean seas: a story told by the cetaceans' skin genes
2018
Mancia, Annalaura | Lunardi, Denise | Abelli, Luigi
Wild animals in their natural environment could provide a big source of information, but sampling can be very challenging, above all for protected species, like marine mammals. Nevertheless, significant data can be obtained sampling stranded animals right after their death, taking into account proper sampling time and methodology.RNA samples from the skin of 12 individuals including the species Stenella coeruleoalba, Tursiops truncatus, and Grampus griseus were used to test 4 potential gene markers of anthropogenic contaminants exposure. The individuals were sampled in 3 geographic areas: the Adriatic, Ionian and Tyrrhenian seas. Three out of the 4 genes tested showed higher expression in the samples collected from the Adriatic Sea. Minute skin samples tell the story of the specific geographic location where the marine mammal spent its life, thanks to the different impact on gene expression exerted by different contamination levels.
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