Element Mean Range n (nd)a Detection Limitb Element Mean Range n (nd)a Detection Limitb Mg  187.02 ± 9.1 138.1-230.8 10 (10) 2.3 Cu 0.35 ± 0.1 0.09-0.67 10 (10) 0.05 Zn  14.71 ± 0.6 12.79-19.67 10 (10) 0.18 Mn 0.27 ± 0.1 0.1-0.74 10 (10) 0.02 Fe  7.24 ± 3 2.3-32.3 10 (7) 2.3 Mo 0.02 ± 0 0.02-0.06 10 (6) 0.02 Se  2.06 ± 0.4 0.7-4.4 10 (10) 0.05         a n (nd) = Total number of samples (Number of samples with detectable levels) b Detection limit = μg/g

Table 3: Concentrations (μg/g ww) of essential metals and one essential element (Se) in skin biopsies from ten adult female southern right whales. Data represent the mean ± standard deviation of the mean and the range of minimum-maximum values measured.