The ratio of observed to theoretical slopes for five C populations(C1-5) and five D populations (D1-5)
| Population . | Obs./theor. . | Population . | Obs./theor. . |
|---|---|---|---|
| C1 | 0.231 | D1 | 0.066 |
| C2 | 0.483 | D2 | 0.006 |
| C3 | 0.005 | D3 | 0.003 |
| C4 | 0.200 | D4 | 0.073 |
| C5 | 0.148 | D5 | 0.115 |
| Population . | Obs./theor. . | Population . | Obs./theor. . |
|---|---|---|---|
| C1 | 0.231 | D1 | 0.066 |
| C2 | 0.483 | D2 | 0.006 |
| C3 | 0.005 | D3 | 0.003 |
| C4 | 0.200 | D4 | 0.073 |
| C5 | 0.148 | D5 | 0.115 |
The ratio of observed to theoretical slopes serves as an index of the extent of osmoregulation. The closer this value is to 0, the greater the osmoregulatory ability in a given population.