| Pedras River | Parado River | ||
| Upper Side | Lower Side | Upper Side | Lower Side |
Morning | 3 per day | 3 per day | 3 per day | 3 per day |
Afternoon | 3 per day | 3 per day | 3 per day | 3 per day |
Total samples in 3 consecutive days | 6 | 6 | 6 | 6 |