Table 1.
Factorial analysis of variance (ANOVA) testing the effect from the collection site (Napoli versus Castellammare di Stabia), the accumulation organ type (muscle versus digestive gland) on the concentration of heavy metals (Pb, Cd and Hg) in Octopus vulgaris. df = degree of freedom. Probability levels for significant effects: p < 0.001 (***); p < 0.01 (**). MS = mean squares; F = F-ratio.
| Source of Variation | Dependent Variable | df | Mean Square | F |
|---|---|---|---|---|
| Site | Pb | 1 | 7.292 | 10.08 ** |
| Cd | 1 | 0.521 | 0.06 | |
| Hg | 1 | 0.012 | 1.15 | |
| Organ | Pb | 1 | 13.583 | 18.77 *** |
| Cd | 1 | 148.532 | 16.08 *** | |
| Hg | 1 | 0.081 | 7.68 |