Table 4.
The statistical parameters for fitting the expected curve of species abundance distribution of ectoparasites on Norway rats (Rattus norvegicus) in the area surrounding Erhai Lake of Dali, Yunnan Province, southwest China
| Log intervals (R) | Individual ranges in each log interval (I) | Midpoint values of each individual range (M) | Observed parasite species | Expected parasite species |
|---|---|---|---|---|
| 0 | 1 | 1 | 13 | 13.00 |
| 1 | 2–4 | 3 | 8 | 12.09 |
| 2 | 5–13 | 9 | 9 | 9.71 |
| 3 | 14–40 | 27 | 5 | 6.75 |
| 4 | 41–121 | 81 | 4 | 4.05 |
| 5 | 122–364 | 243 | 4 | 2.10 |
| 6 | 365–1093 | 729 | 2 | 0.94 |
| 7 | 1094–3280 | 2187 | 1 | 0.37 |
| 8 | 3281–9841 | 6561 | 1 | 0.12 |
Annotation: M is the midpoint of I, 3R =M, log3M =R. α = 0.27, R2 = 0.80.