Marine Environment Monitoring and Assessment National database (MERMAN)
CSEMP assessment of mercury in biota at Dogger Central
Statistical analysis
Details
Media : Biota (Common dab muscle)
Station : HumWash_HWOpenSeaNE_fi04 (Dogger Central)
Determinand : Mercury
Units : μg kg-1 wet weight
Data extraction : 20 July 2018
Trend assessment
Analysis of variance
| Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
|---|---|---|---|---|---|---|---|---|
| mean | 1 | 29.37 | 31.62 | -11.69 | 23.37 | |||
| linear | 2 | 30.25 | 34.82 | -11.12 | 22.25 | 1.125 | 1 | 0.2889 |
| smooth (df = 2) | 3 | 32.23 | 40.57 | -11.12 | 22.23 | 0.013 | 1 | 0.9079 |
| smooth (df = 3) | 4 | 33.23 | 47.63 | -10.62 | 21.23 | 0.999 | 1 | 0.3176 |
Change in log concentration
| Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
|---|---|---|---|---|---|---|---|---|
| overall | 2001 | 2015 | 4.538 | 4.212 | -0.3265 | 0.2989 | -1.092 | 0.3031 |
| last 20 years | 2001 | 2015 | 4.538 | 4.212 | -0.3265 | 0.2989 | -1.092 | 0.3031 |
Status assessment
| Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
|---|---|---|---|---|---|---|
| BAC | 67.5 | 35.0 | -0.6565 | 0.1973 | -3.327 | 0.9956 |
| EC | 67.5 | 500.0 | 2.0027 | 0.1973 | 10.150 | <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
