Abstract
Manganese concentrations were determined in muscle, kidney, liver, spleen, lung and fat tissues and skin of three cetacean species, the bottlenose (Tursiops truncatus), striped (Stenella coeruleoalba) and Risso's (Grampus griseus) dolphins, stranded along the Croatian Adriatic coast between 1995 and 2013. Mean ranges determined in tissues were (mg/kg, ww): muscle 0.23-0.27, liver 2.87-4.00, kidney 0.66-1.26, spleen 0.37-0.79, lung 0.18-0.57, skin 0.11-0.97, fat 0.06-0.42. The highest Mn mean levels in tissues were measured in species (mg/kg, ww): T. truncates lung 0.41, skin 0.97, fat 0.42; S. coeruleoalba muscle 0.26; G. griseus kidney 1.26, liver 4.00, spleen 0.64. Significant differences of Mn concentrations in the liver (p = 0.034), spleen (p = 0.037) and skin (p = 0.013) were found among the three dolphin species. Significant differences in Mn levels were found between young and adult T. truncates in kidney (p = 0.042), lung (p = 0.0040) and skin (p = 0.0034).
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