Concentrations of mercury and other trace elements in two offshore skates: sandy ray Leucoraja circularis and shagreen ray L. fullonica
Nicolaus, E.E Manuel | Barry, Jon | Bolam, Thi P.C. | Lorance, Pascal | Marandel, Florianne | McCully Phillips, Sophy R. | Neville, Suzanna | Ellis, Jim
Trace metal concentrations in muscle and liver tissues from two offshore species of skate were examined. Concentrations of mercury in muscle of Leucoraja circularis (n=20; 23–110.5cm total length, 157–490m water depth) and L. fullonica (n=24; 28.5–100cm total length, 130–426m water depth) were 0.02–1.8 and 0.04–0.61mgkg−1, respectively. Concentrations of both As and Hg increased with total length. Only the largest specimen had a concentration of Hg in muscle >1.0mgkg−1. Data were limited for specimens>90cm long, and further studies on contaminants in larger-bodied skates could usefully be undertaken.
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