CSEMP assessment of cadmium 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 | -25.20 | -23.20 | 15.60 | -31.20 | | | |
| linear | 2 | -23.56 | -19.56 | 15.78 | -31.56 | 0.356 | 1 | 0.5507 |
| smooth (df = 2) | 3 | -25.14 | -18.00 | 17.57 | -35.14 | 3.584 | 1 | 0.0583 |
| smooth (df = 3) | 4 | -26.91 | -14.91 | 19.46 | -38.91 | 3.771 | 1 | 0.0522 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2000 | 2018 | 6.144 | 6.025 | -0.11894 | 0.19849 | -0.599 | 0.5624 |
| last 20 years | 2000 | 2018 | 6.144 | 6.025 | -0.11894 | 0.19849 | -0.599 | 0.5624 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 413.7 | 156.5 | -0.9722 | 0.1147 | -8.475 | 1.0000 |
| EC | 413.7 | 1000.0 | 0.8826 | 0.1147 | 7.693 | <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
