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Bold numbers indicate significantly higher values. N.D. = not detected. Al = aluminum, Si = silicon, P = phosphorus, S = sulfur, Ca = calcium, Ti = titanium, V = vanadium, Cr = chromium, Mn = manganese, Fe = iron, Ni = nickel, Cu = copper, Zn = zinc, Zr = zirconium, Ag = silver, Cd = cadmium, Sn = tin, Sb = antimony, W = tungsten, Pb = lead, LE = light elements. a,b,c,d indicate a significant difference at p < 0.05 when compared across dugong tusks, and dugong, dolphin and whale teeth.