Multidisciplinary evaluation of an environmentally driven health risk: the case study of herring and dioxin (EVAHER) HERC Seminar 25.10.2007, Mari Vanhatalo In collaboration with Samu Mäntyniemi Department of Biological and Environmental Sciences University of Helsinki [email protected]Fisheries Environmental and management group http://www.helsinki.fi/science/fem/
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HERC Seminar 25.10.2007, Mari Vanhatalo In collaboration with Samu Mäntyniemi
HERC Seminar 25.10.2007, Mari Vanhatalo In collaboration with Samu Mäntyniemi Department of Biological and Environmental Sciences University of Helsinki [email protected] Fisheries Environmental and management group http://www.helsinki.fi/science/fem/. - PowerPoint PPT Presentation
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Multidisciplinary evaluation of an environmentally driven health risk: the case study of herring and dioxin(EVAHER)
HERC Seminar 25.10.2007, Mari Vanhatalo In collaboration with Samu Mäntyniemi
Department of Biological and Environmental SciencesUniversity of Helsinki
individuals nowadays, because a major part of herring is
consumed in forms that obscure the original size.
What would be the risk from intake of smaller herring,
length ≤ 17cm (0-30g)?
EU SCF limit for all foodstuff of WHOtotal-TEq 840 pg wk-1
and limit of WHOtotal-TEq originating from herring is 275
pg WHOtotal-TEq wk-1
Results from first analysis (Kiljunen et al. 2007) show that
regulating the fishing is a far less effective way to
decrease the risk than regulating the consumption of
herring
Individual variability in dioxin content of herring
25102007 14
Materials, data
90 herring individuals were collected from the Bothnian
Sea, northern Baltic, in June 2002. (Parmanne et al.) Human herring consumption frequencies were obtained
from the survey of the Finnish National Health Institute,
(J.Tuomisto et al) consumption classes 1,…,5 Classes are: 1, 2, 4, 8 or 20 times herring per month
The relative frequencies of age groups in catch in 2002
were calculated from herring population estimates
provided by the Finnish Game and Fisheries Research
Institute. (Jukka Pönni)
25102007 15
0
0.02
0.04
0.06
0 5 10 15 20 25 30 35 40
pg WHO-TEq g-1
Re
lati
ve
pro
ba
bili
ty d
en
cit
y Status quo
1) Present F maintained
2) 50% increase in F
3) 100% increase in F
4) 50% decarease
Relative probability distribution of whole market herring WHO_total_TEq consentrations (pg g-1) estimated for present day (status quo 2002) and future fishing scenarios. Kiljunen et al. 2007, Ambio
25102007 16
Results
0
0,1
0,2
0,3
0,4
0,5
0 500 1000 1500 2000
275 840
WHO-TEQtotal intake in decade in four main herring consumptions classes
0
0,1
0,2
0,3
0,4
0,5
0,6
0 500 1000 1500
275 840
ii) status quo
ii) status quoIi) status quo
i) small herring
25102007 17
Results II
0
0,05
0,1
0,15
0,2
0,25
0,3
0 500 1000 1500
275 840
0
0,1
0,2
0,3
0,4
0,5
0,6
0 500 1000 1500
275840
WHO-TEQtotal intake
in one week (small
herring)
i) within 15 days
ii) within 40 weeks
(whole pregnancy
time)
in four main herring
consumptions classes
25102007 18
Conclusions
Herring consumers cannot choose unless they don’t know
the herring size. It is possible to reduce the dioxin risk related to herring
consumption by the following means:
Sort herring size-selectively in food industry. The
information about the size of herring used should be passed
on to the consumer
Then it could be possible to reduce the dioxin risk by
regulating the consumption of herring by size, if consumers
could choose the small or bigger ones.
25102007 19
Discussion
• Recommendation related to breast-feeding time?
• What is the true dioxin intake of fetus and the baby? And risk?– Different metabolism,