highly significantP < 0.001
A combined t test between all samples recovered from Stratum I ( n = 24) and the control group shells ( n = 6) indicates a highly significant ( P < 0.001) difference in mean ∆ 47 value between the two populations.
A combined t test between all samples recovered from Stratum I ( n = 24) and the control group shells ( n = 6) indicates a highly significant ( P < 0.001) difference in mean ∆ 47 value between the two populations.