Lincoln index: N = (M × C) ÷ R · M = marked in the first catch, C = the whole second catch, R = marked animals in the second catch
Assumptions
Filled = carries a mark (counted in R). Once true N is revealed, a dashed outline shows a beetle that was marked but lost its mark.
| M (marked) | — |
| C (second catch) | — |
| R (marked in C) | — |
| N = (M × C) ÷ R | — |
| Estimates | 0 |
| Mean estimate | — |
| Range | — |
| True N | hidden |
Bigger dots are estimates from bigger samples (larger M × C).
Step 1: catch, mark and release a first sample.