Table 5 Specific and mean richness and Shannon–Weaver diversity (H) and equitability (E) indices of gastropods in the three study sites
| Parameters | El-Hadaiek | Azzaba | Ben-Azzouz |
|---|---|---|---|
| Specific richness (S) | 7 | 5 | 6 |
| Mean richness (S′) | 319 | 366.5 | 392 |
| H′ | 0.68 | 0.52 | 0.51 |
| E | 0.32 | 0.35 | 0.28 |