POPs in Baltic herring: Difference between revisions
(New page: <br> == Scope == '''Concentrations of PCDD/Fs in fish''' describes concentrations<span> of polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans furans (PCDD/Fs) in fish....) |
m (fish category added) |
||
| Line 1: | Line 1: | ||
[[Category:Fish]] | |||
{{variable}} | |||
== Scope == | == Scope == | ||
| Line 11: | Line 12: | ||
=== Data === | === Data === | ||
Probability distributions of total WHO-TEQ concentrations of PCDD/Fs in various fish species were extracted from <ref>http://www.pyrkilo.fi/beneris/index.php/Image:Analytical_data_of_foods-Finland_for_BENERIS_hk_ak.xls</ref> where concentrations of 17 PCDD/F congeners found in different marine and freshwater fish species were collected. Three theoretical distributions were fitted to the WHO-TEQ concentration data - Weibull, lognormal and gamma. For many fish species the number of data points was too small to give reliable fit results. Therefore, the best fitting distribution was chosen based on the statistical data analysis and goodness-of-fit evaluation performed on a largest set of data points (BS Herring, 47 samples) and then fitted to data of the rest of fish species. It turned out that lognormal distribution provides the best fit to PCDD/Fs concentration data. | |||
=== Causality === | === Causality === | ||
Revision as of 07:53, 6 November 2008
| Moderator:Nobody (see all) Click here to sign up. |
|
|
| Upload data
|
Scope
Concentrations of PCDD/Fs in fish describes concentrations of polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans furans (PCDD/Fs) in fish. Concentrations of sea and freshwater fish species are studied separately.
Definition
Data
Probability distributions of total WHO-TEQ concentrations of PCDD/Fs in various fish species were extracted from [1] where concentrations of 17 PCDD/F congeners found in different marine and freshwater fish species were collected. Three theoretical distributions were fitted to the WHO-TEQ concentration data - Weibull, lognormal and gamma. For many fish species the number of data points was too small to give reliable fit results. Therefore, the best fitting distribution was chosen based on the statistical data analysis and goodness-of-fit evaluation performed on a largest set of data points (BS Herring, 47 samples) and then fitted to data of the rest of fish species. It turned out that lognormal distribution provides the best fit to PCDD/Fs concentration data.
Causality
Unit
pg/g fw WHO-TEQ
Formula
Result
| Fish species | Mean WHO-TEQ PCDD/F concentration |
| Baltic Herring | 5.586 |
| Vendace(inland) | 0.913 |
| Vendace(sea) | 0.616 |
| Whitefish(inland) | 0.917 |
| Whitefish(sea) | 2.831 |
| Pike(inland) | 0.439 |
| Pike(sea) | 0.921 |
| Perch(inland) | 0.266 |
| Perch(sea) | 2.376 |
| Atlantic Salmon | 11.21 |
| Pike-perch(inland) | 0.445 |
| Pike-perch(sea) | 1.347 |
See also
References