Marine Environment Monitoring and Assessment National database (MERMAN)
Location of station at West Dogger ©
CSEMP assessment of cb138 in biota at West Dogger
Statistical analysis
Details
Media : Biota (Common dab liver)
Station : HumWash_HWOpenSeaNE_fi03 (West Dogger)
Determinand : CB138
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 | 77.54 | 80.54 | -35.77 | 71.54 | |||
| linear | 2 | 79.12 | 85.52 | -35.56 | 71.12 | 0.429 | 1 | 0.5123 |
| smooth (df = 2) | 3 | 75.52 | 88.02 | -32.76 | 65.52 | 5.600 | 1 | 0.0180 |
Change in log concentration
| Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
|---|---|---|---|---|---|---|---|---|
| overall | 1999 | 2011 | 2.7616 | 2.4394 | -0.3222 | 0.4864 | -0.662 | 0.5289 |
| last 20 years | 1999 | 2011 | 2.7616 | 2.4394 | -0.3222 | 0.4864 | -0.662 | 0.5289 |
Status assessment
| Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
|---|---|---|---|---|---|---|
| BAC | 11.47 | 0.09 | -4.847 | 0.274 | -17.663 | 1.0000 |
| EAC | 11.47 | 50.72 | 1.487 | 0.274 | 5.418 | 0.0005 |
Raw data with supporting information
Raw data with assessment
Assessment plot
Chlorobiphenyls data
Chlorobiphenyls assessment
Related pages
- Clean Seas Environment Monitoring Programme (CSEMP) accessment viewer tool
- Assessment methodology for chlorobiphenyls in biota
- Accessment criteria for chlorobiphenyls in biota
