CSEMP assessment of mercury in biota at Crosby (Mersey Channel)
Statistical analysis
Trend assessment
Analysis of variance
| | Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) |
| mean | 1 | -8.08 | -6.28 | 7.04 | -14.08 | | | |
| linear | 2 | -9.63 | -6.07 | 8.81 | -17.63 | 3.549 | 1 | 0.0596 |
| smooth (df = 2) | 3 | -8.52 | -2.27 | 9.26 | -18.52 | 0.889 | 1 | 0.3457 |
| smooth (df = 3) | 4 | -8.39 | 1.90 | 10.19 | -20.39 | 1.870 | 1 | 0.1715 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2000 | 2018 | 4.045 | 3.772 | -0.27260 | 0.13684 | -1.992 | 0.0718 |
| last 20 years | 2000 | 2018 | 4.045 | 3.772 | -0.27260 | 0.13684 | -1.992 | 0.0718 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 43.5 | 14.7 | -1.0862 | 0.0789 | -13.774 | 1.0000 |
| EC | 43.5 | 500.0 | 2.4426 | 0.0789 | 30.974 | <0.0001 |
Raw data with supporting information
Raw data with assessment
Assessment plot
Metals data
Metals assessment
Related pages
- Clean Seas Environment Monitoring Programme (CSEMP) accessment viewer tool
- Assessment methodology for metals in biota
- Accessment criteria for metals in biota
