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 | -5.07 | -3.07 | 5.54 | -11.07 | | | |
| linear | 2 | -6.76 | -2.76 | 7.38 | -14.76 | 3.692 | 1 | 0.0547 |
| smooth (df = 2) | 3 | -5.21 | 1.94 | 7.60 | -15.21 | 0.443 | 1 | 0.5058 |
| smooth (df = 3) | 4 | -5.14 | 6.86 | 8.57 | -17.14 | 1.931 | 1 | 0.1647 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2000 | 2017 | 4.059 | 3.757 | -0.30195 | 0.14779 | -2.043 | 0.0683 |
| last 20 years | 2000 | 2017 | 4.059 | 3.757 | -0.30195 | 0.14779 | -2.043 | 0.0683 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 42.8 | 14.7 | -1.0717 | 0.0868 | -12.351 | 1.0000 |
| EC | 42.8 | 500.0 | 2.4571 | 0.0868 | 28.318 | <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
