Table 4. Modelling the relationships between blood Hg concentration a) baseline plasma LH concentrations, b) LH change from 0 to 10 minutes and c) LH change from 10 to 30 minutes in pre-laying snow petrels ≤23 years old and >23 years old.
| Independent variable: Hg | ≤23 years old | >23 years old | ||||||
| Dependent variable | SS | Df | F | p-value | SS | Df | F | p-value |
| a) Baseline LH | 31 | 1,25 | 5 | 0.041 | 0.8 | 1,11 | 0 | 0.830 |
| b) LH change from 0 to 10 minutes | 0 | 1,21 | 0 | 0.713 | 0.1 | 1,10 | 1 | 0.429 |
| c) LH change from 10 to 30 minutes | 0 | 1,19 | 1 | 0.269 | 0.1 | 1,9 | 2 | 0.205 |
SS = Sum of squares.