CSEMP assessment of CB101 in biota at Roa Island (Morecambe Bay)
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | 33.02 | 37.52 | -13.51 | 27.02 | |||
linear | 2 | 34.40 | 45.07 | -13.20 | 26.40 | 0.615 | 1 | 0.4327 |
smooth (df = 2) | 3 | 34.95 | 59.95 | -12.48 | 24.95 | 1.447 | 1 | 0.2291 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 1999 | 2015 | -1.0173 | -1.8352 | -0.8179 | 1.0479 | -0.780 | 0.4704 |
last 20 years | 1999 | 2015 | -1.0173 | -1.8352 | -0.8179 | 1.0479 | -0.780 | 0.4704 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 0.1596 | 0.1141 | -0.3355 | 0.7528 | -0.446 | 0.6628 |
EAC | 0.1596 | 1.5730 | 2.2882 | 0.7528 | 3.040 | 0.0144 |
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
Media : Biota (Blue mussel soft body)
Station : IrishSea_MorecambeBay_sh01, Roa Island (Morecambe Bay)
Determinand : CB101
Units : μg kg-1 wet weight
Data extraction : 30 April 2020
Station : IrishSea_MorecambeBay_sh01, Roa Island (Morecambe Bay)
Determinand : CB101
Units : μg kg-1 wet weight
Data extraction : 30 April 2020