Marine Environment Monitoring and Assessment National database (MERMAN)
Location of station at Dogger Central ©
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 : 19 October 2016
Trend assessment
Analysis of variance
| Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
|---|---|---|---|---|---|---|---|---|
| mean | 1 | 27.83 | 30.08 | -10.92 | 21.83 | |||
| linear | 2 | 28.70 | 33.27 | -10.35 | 20.70 | 1.134 | 1 | 0.2868 |
| smooth (df = 2) | 3 | 30.69 | 39.02 | -10.34 | 20.69 | 0.010 | 1 | 0.9188 |
| smooth (df = 3) | 4 | 31.71 | 46.11 | -9.85 | 19.71 | 0.977 | 1 | 0.3229 |
Change in log concentration
| Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
|---|---|---|---|---|---|---|---|---|
| overall | 2001 | 2015 | 4.540 | 4.213 | -0.3268 | 0.2978 | -1.097 | 0.3010 |
| last 20 years | 2001 | 2015 | 4.540 | 4.213 | -0.3268 | 0.2978 | -1.097 | 0.3010 |
Status assessment
| Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
|---|---|---|---|---|---|---|
| BAC | 67.6 | 35.0 | -0.6579 | 0.1967 | -3.345 | 0.9957 |
| EC | 67.6 | 500.0 | 2.0013 | 0.1967 | 10.176 | <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
