CSEMP assessment of CB138 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 | 19.11 | 22.11 | -6.56 | 13.11 | |||
linear | 2 | 16.33 | 22.73 | -4.17 | 8.33 | 4.783 | 1 | 0.0287 |
smooth (df = 2) | 3 | 18.12 | 30.62 | -4.06 | 8.12 | 0.208 | 1 | 0.6487 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 1999 | 2015 | 0.1403 | -0.5846 | -0.7249 | 0.3110 | -2.331 | 0.0526 |
last 20 years | 1999 | 2015 | 0.1403 | -0.5846 | -0.7249 | 0.3110 | -2.331 | 0.0526 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 0.557 | 0.098 | -1.7402 | 0.2248 | -7.740 | 0.9999 |
EAC | 0.557 | 4.121 | 2.0007 | 0.2248 | 8.898 | <0.0001 |
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 : CB138
Units : μg kg-1 wet weight
Data extraction : 30 April 2020
Station : IrishSea_MorecambeBay_sh01, Roa Island (Morecambe Bay)
Determinand : CB138
Units : μg kg-1 wet weight
Data extraction : 30 April 2020