Difference between revisions of "Mercury and methyl mercury concentrations in fish"
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==Scope== | ==Scope== | ||
− | '''Mercury and methyl mercury concentrations in fish''' describes concentrations of mercury and methyl mercury in fish. {{ | + | '''Mercury and methyl mercury concentrations in fish''' describes concentrations of mercury and methyl mercury in fish. {{reslink|Should the variable restrict to Finland?}} Concentrations of sea and freshwater fish species are studied separately. |
== Definition == | == Definition == |
Revision as of 09:25, 10 February 2008
Scope
Mercury and methyl mercury concentrations in fish describes concentrations of mercury and methyl mercury in fish. R↻ Concentrations of sea and freshwater fish species are studied separately.
Definition
Causality
List of parents:
- none
Data
The mercury data includes total mercury concentrations of fish species.[1] The most commonly consumed fish species are described: Farmed salmon, wild salmon, herring, white fish, sprat, perch, flounder, pike-perch, bream, pike, vendace and burbot. Concentration data for imported fish in Finland is not available in many cases. D↷
Unit
mg/kg in fresh weight
Formula
Analytica_id:
<anacode> Table(Substances,Fishspecies)( (10K*Triangular(1.467,1.577,1.615)),(10K*Triangular(1.467,1.467,1.615)),(10K*Uniform(0.785,1.173)), (10K*Normal(0.783,(0.1*0.783))),(10K*Uniform(0.785,1.173)),(10K*Normal(0.303,(0.1*0.303))), (10K*Normal(0.422,(0.1*0.422))),(10K*Normal(0.406,(0.1*0.406))),(10K*Normal(0.493,(0.1*0.493))), (10K*Normal(0.292,(0.1*0.292))),(10K*Normal(0.751,(0.1*0.751))),(10K*Normal(0.201,(0.1*0.201))), (10K*Triangular(1.467,1.467,1.577)),(10K*Normal(0.783,(0.1*0.783))),(10K*Normal(0.303,(0.1*0.303))), (10K*Normal(0.406,(0.1*0.406))),(10K*Normal(0.493,(0.1*0.493))),(10K*Normal(0.292,(0.1*0.292))), (10K*Normal(0.751,(0.1*0.751))),(10K*Normal(0.201,(0.1*0.201))), (Mercury*Mehg_proportion),(Mercury*Mehg_proportion),(Mercury*Mehg_proportion),(Mercury*Mehg_proportion), (Mercury*Mehg_proportion),(Mercury*Mehg_proportion),(Mercury*Mehg_proportion),(Mercury*Mehg_proportion), (Mercury*Mehg_proportion),(Mercury*Mehg_proportion),(Mercury*Mehg_proportion),(Mercury*Mehg_proportion), (Mercury*Mehg_proportion),(Mercury*Mehg_proportion),(Mercury*Mehg_proportion),(Mercury*Mehg_proportion), (Mercury*Mehg_proportion),(Mercury*Mehg_proportion),(Mercury*Mehg_proportion),(Mercury*Mehg_proportion) )</anacode>
Narrative description
- There are no separate data for farmed and for wild salmon. Therefore they are assumed to be the same.
- There are no data for vendace(sea), so assumption is that the parameters are the same as vendace(inland)
- There are no data for bream(sea), so assumption is that the parameters are the same as bream(inland)
- There are no data for wild salmon(inland), so assumption is that the parameters are the same as wildsalmon(sea)
First, the mercury data was used to form lognormal distributions for each species with parameters median and geometric standard deviation. Secondly, the proportion of methyl mercury from total mercury was taken into account. Methyl mercury proportion is assumed to follow triangular distribution (author judgement) with parameters (min=0.81, mode=0.93,max=0.98). D↷
Result
Fish species | Methylmercury concentration |
---|---|
Farmed salmon (sea+inland) | 0.06346 |
Wild salmon | 0.06347 |
Herring(sea) | 0.02719 |
White fish(sea) | 0.02719 |
Sprat(sea) | 0.01813 |
Perch(sea) | 0.3082 |
Flounder(sea) | 0.04533 |
Pike-perch(sea) | 0.09972 |
Bream(sea) | 0.05439 |
Pike(sea) | 0.3626 |
Vendace(sea) | 0.0725 |
Burbot(sea) | 0.2358 |
Wild salmon(inland) | 0.06347 |
White fish(inland) | 0.07253 |
Perch(inland) | 0.1269 |
Pike-perch(inland) | 0.272 |
Bream(inland) | 0.0544 |
Pike(inland) | 0.3445 |
Vendace(inland) | 0.07253 |
Burbot(inland) | 0.1995 |
References
- ↑ Methyl mercury: EU-kalat elintarvikeviraston julkaisuja 3/2004. Page 13.