CSEMP assessment of mercury in biota at Camarthen Bay
Statistical analysis
Trend assessment
Analysis of variance
| | Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) |
| mean | 1 | 45.10 | 47.35 | -19.55 | 39.10 | | | |
| linear | 2 | 45.35 | 49.93 | -18.68 | 37.35 | 1.743 | 1 | 0.1867 |
| smooth (df = 2) | 3 | 47.30 | 55.63 | -18.65 | 37.30 | 0.056 | 1 | 0.8129 |
| smooth (df = 3) | 4 | 46.87 | 61.27 | -17.44 | 34.87 | 2.426 | 1 | 0.1194 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2003 | 2018 | 3.967 | 4.322 | 0.3553 | 0.2586 | 1.374 | 0.2027 |
| last 20 years | 2003 | 2018 | 3.967 | 4.322 | 0.3553 | 0.2586 | 1.374 | 0.2027 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 75.4 | 35.0 | -0.7671 | 0.1667 | -4.602 | 0.9994 |
| EC | 75.4 | 500.0 | 1.8921 | 0.1667 | 11.350 | <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
