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Howard 2007: An. gambiae immatures in three ponds before and after the introduction of fish
| Intervention | Pre-intervention (months) | Follow-up (months) | ||
|---|---|---|---|---|
| 3 | 1 | 1 | 3 | |
| Control pond | 0 | 7 | 7 | 4 |
| First experimental pond1 | 3 | 7 | 0 | 0 |
| Second experimental pond2 | 2 | 4 | 2 | 2 |
