Benefit-risk assessment of Baltic herring and salmon intake

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For the final version of this assessment, see the scientific article.[1]

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What are the current individual and population level health benefits and risks of eating Baltic herring and salmon in Finland, Estonia, Denmark and Sweden? How would the health effects change in the future, if consumption of Baltic herring and salmon changes due to actions caused by a) fish consumption recommendations or limitations, b) different management scenarios of Baltic sea fish stocks, or c) selection of fish sizes for human consumption?


BONUS GOHERR project (2015-2018) looked at this particular question. A health impact assessment was performed based on fish consumption survey done in the four target countries; EU Fish 2 study about dioxin and PCB concentrations; a dynamic growth model about Baltic herring stock sizes and dioxin accumulation; scientific literature about exposure-response functions of several compounds found in Baltic fish; and online models produced in Opasnet web-workspace. This page describes the benefit-risk assessment performed.[1]

Dioxin and PCB concentrations have been constantly decreasing in Baltic fish for 40 years, and now they are mostly below EU limits. Also Baltic herring consumption has been decreasing during the last decades and is now a few grams per day, varying between age groups (old people eat more), genders (males eat more) and countries (Estonians eat more and Danes less than others). People reported that better availability of easy products, recipes, and reduced pollutant levels would increase their Baltic herring consumption. In contrast, recommendations to reduce consumption would have little effect on average.

Health benefits of Baltic herring and salmon clearly outweigh health risks in age groups over 45 years. Benefits are higher even in the most sensitive subgroup, women at childbearing age. The balance is close to even, if exceedance of the tolerable daily intake is given weight in the consideration and if other omega-3 sources are given priority over fish. The analysis was robust in a sense that we did not find uncertainties that could remarkably change the conclusions and suggest postponing decisions in hope of new information.

Overall, main arguments from this health assessment and other disciplines studied in Goherr are in favour of getting rid of dioxin-based food restrictions related to Baltic herring and salmon, and promoting human consumption of Baltic fish.

Schematic picture of the health benefit-risk model for Baltic herring and salmon intake.

Assessment presentation · show ready-made model results


This assessment is part of the WP5 work in Goherr project. Purpose is to evaluate health benefits and risks caused of eating Baltic herring and salmon in four Baltic sea countries (Denmark, Estonia, Finland and Sweden). This assessment is currently on-going.


What are the current individual and population level health benefits and risks of eating Baltic herring and salmon in Finland, Estonia, Denmark and Sweden? How would the health effects change in the future, if consumption of Baltic herring and salmon changes due to actions caused by a) fish consumption recommendations or limitations, b) different management scenarios of Baltic sea fish stocks, or c) selection of fish sizes for human consumption?

Intended use and users

Results of this assessment are used to inform policy makers about the health impacts of fish. Further, this assessment will be combined with the results of the other Goherr WPs to produce estimates of future health impacts of Baltic fish related to different policy options. Especially, results of this assessment will be used as input in the decision support model built in Goherr WP6.


  • University of Helsinki: Sakari Kuikka, Päivi Haapasaari, Suvi Ignatius, Kirsi Hoviniemi, Inari Helle, Annukka Lehikoinen, Mika Rahikainen
  • National Institute for Health and Welfare (THL): Jouni Tuomisto, Arja Asikainen, Päivi Meriläinen
  • University of Oulu: Timo P. Karjalainen, Simo Sarkki, Mia Pihlajamäki
  • Swedish University of Agricultural Sciences (SLU): Anna Gårdmark, Johan Östergren, Magnus Huss, Andreas Bryhn, Philip Jacobson
  • University of Aalborg/Innovative Fisheries Management (IFM-AAU): Alyne Delaney, Jesper Raakjaer
  • Stakeholders needed in the assessment: fisher's associations, agricultural/fisheries ministries in Finland, Sweden, Estonia, Denmark.


  • Four baltic sea countries (Denmark, Estonia, Finland, Sweden)
  • Current situation (fish use year 2016, pollutant levels in fish year 2010)
  • Estimation for future (not year specific)
  • Area considered: Sweden, Finland, Denmark, Estonia. For detailed herring/salmon stock modelling, only the Bothnian Sea and Gulf of Bothnia is considered.
  • Policies considered: See the table below.
  • This assessment looks at health only. Goherr as a project will consider wider objectives: threats to and state of the fish stocks; impacts and governance responses. See below.

Decisions and scenarios

In Goherr, the scope is wide and we are looking at scenarios about fragmented vs. integrated governance and high vs. low human impact at the Baltic Sea Region. These scenarios are described in more detail on a page about management scenarios developed in Goherr WP3.

In this assessment, will look at health only, but the decisions and options considered are based on the wider discussions about integrated governance. The main decisions considered are improvements about fish availability and recipes, food recommendations, and selection of fish sizes used for consumption. The changes caused by each option are estimated based on the Goherr fish consumption study.[2]

  • Info.improvements with options
    • BAU (Business as usual): current availability of and chemical levels in herring and salmon.
    • Yes: Better availability of and less chemicals in herring and salmon.
  • Recomm.herring with options
    • BAU: authorities recommendations about Baltic herring do not change.
    • Eat more: authorities recommend to eat more Baltic herring.
    • Eat less: authorities recommend to eat less Baltic herring.
  • Recomm.salmon with options
    • BAU: authorities recommendations about Baltic salmon do not change.
    • Eat more: authorities recommend to eat more Baltic salmon.
    • Eat less: authorities recommend to eat less Baltic salmon.
  • Coherent consumer policy (Cons.policy): This is a combination of the three decisions above, with options:
    • BAU: BAU is chosen for all three decisions.
    • Less: BAU for Info.improvements and Eat less for both herring and salmon recommendation
    • More: Yes for Info.improvements and Eat more for both herring and salmon recommendation
    • Inconsistent: All other combinations

There are also more technical scenarios: what if nobody eats fish more than 3 g/d on average, what time points will be considered, what pollutants will be considered, and will other sources of nutrients and pollutants be considered as primary or will fish be considered as primary source. The ordering in the latter scenario is important if exposure-response functions are non-linear, as is case with e.g. omega-3 fatty acids. The marginal omega-3 benefits are highest with low exposures, and marginal benefit becomes smaller as the exposure increases. Thus, the health impacts of a primary source are considered larger than those of a secondary source.


The assessment started in April 2015. The first stakeholder meeting was in February 2016 and the second in November 2017. The final results with the full assessment were finalised in June 2018.



The results of this assessment have been published in a peer-reviewed scientific journal.[1]

Not all of the following graphs are from the final model version (run at September, 2019). Please check the date of the graph before making conclusions.

Value of information analyses

For detailed results, see model run on 18.11.2018. Value of information was looked at in three parts, where a bunch of similar decisions were considered together. In these VOI analyses, infertility was used as the outcome for the sperm concentration effect, while tolerable weeksly intakes (both the current "Dioxin TWI" and the new suggested "TWI 2018") were ignored.

Value of information was calculated for the total burden of disease in a random population subgroup in the four study countries, but using uncertainties for individual people. This approach ensures that value of information is not underestimated, because at population level many uncertainties are smaller than at individual level.

  • Select herring size
    • There is practically no expected value of perfect information (EVPI) (only 1.5 DALY/a) because Ban large, i.e. switching to small herring is in most cases better than other alternatives. However, also other options are beneficial, and the expected value of including that option is 16 DALY/a.
    • If that option is excluded, EVPI increases to 8 DALY/a.
  • Consider background and limit maximal fish intake to 3 g/d are evaluated at the same time.
    • EVPI is slightly higher than with herring size, 51 DALY. This is because there is no obvious single decision option to choose.
    • Dropping the option Background=No would cost 1880 DALY/a, demonstrating that that is clearly a good choice. However, whether background should be considered or not is not an actionable decision but rather a value judgement about how the situation should be seen. In practice, if you consider background intake (Background=Yes), you ignore a large amount of health benefits from omega3 fatty acids in fish. Some people may say that ignoring it is exactly what you should do because those omega3 fatty acids can easily be received from sources that do not have pollutants (the default in this assessment), while others say that fish and other natural foods are the primary source, and omega3 pills and other food supplements should only be used if undernourished.
    • If you always consider background intake, then the model uncertainties decrease, and your EVPI is lower (10 DALY/a). The largest EVPI (42 DALY/a) is obtained when fish intake is not limited to 3 g/d; this is because there is more room for benefits leveling off and relative importance of risks increasing, thus increasing uncertainty to decision making.
  • Improved information (including availability and usability of fish) and consumption recommendations.
    • EVPI with these decisions is 40 DALY/a, so there is some uncertainty about what to do.
    • The most important decision option is to increase information and fish availability (145 DALY/a), while any of the other options can be excluded without much change in expected value.

In a previous analysis we used tolerable weeksly intake instead of infertility (model run on 20.4.2018, data not shown). The disability weight used for tolerable weekly dioxin intake is highly uncertain in the model (hundredfold uncertainty 0.0001 - 0.01 DALY/case of exceedance). Therefore, presumably it would be very important to know the actual value that the society wants to allocate to this impact. But actually it is not, as knowing the value has expected value of partial perfect information (EVPPI) of only 12 DALY/a. The reason for this seems to be that this disability weight rarely becomes so high that a decision maker would actually regret fish-promoting policies.


Overall, main arguments from this health assessment and other disciplines studied in Goherr are in favour of getting rid of dioxin-based food restrictions related to Baltic herring and salmon, and promoting human consumption of Baltic fish.

Fish is healthy food, and its use should be promoted. This applies to Baltic herring and salmon as well, even when considering the dioxin and methylmercury concentrations and vulnerable subgroups. This assessment has shown several reasons that support this conclusion:

  • Net health benefits are clear in older age groups with increased risk of cardiovascular diseases.
  • Even in the subgroup of young females, the risks are close to or smaller than benefits.
  • We also considered the tolerable weekly intake (TWI) of dioxin in the assessment. This is actually not a health risk per se, but an indicator that the exposure is approaching levels where actual health harm may occur. However, we did give it a reasonable weight in the model, as we thought that it is something that people don’t want to exceed. Even when it is considered in the assessment, the previous conclusions prevail. If this outcome is ignored, the health risks become so small that there is little uncertainty about the conclusion.
  • Dioxin concentrations have decreased dramatically since the 1990's, which was the starting point of our scenarios. In fact, the decrease started even earlier during the 1970's and 1980's when industrial emissions started to improve. The current levels are roughly one tenth of the worst levels. So, the remaining dioxin problem is way smaller than its historical reputation implies.
  • Young women are the risk group but they eat less Baltic herring and salmon than other population subgroups. Therefore, fish promotion policies are likely to increase the health benefits in other subgroups (especially the elderly) much more than health risks in young women.
  • According to the fish consumption survey (Task 5.3), policies promoting Baltic fish consumption seem to encourage people to increase their fish intake substantially. In contrast, discouraging policies were effective only in a minority, while some would paradoxically increase fish intake, and the average change would be negligible.
  • Recommendations to limit Baltic herring intake can be targeted to the risk group of young women only. However, it is possible that as a side effect, these recommendations affect also other age groups even if they would benefit from increasing herring consumption. The other groups could face risks that are larger than benefits in young women, and the overall health impact could be poor. (However, while people responded that such recommendations would not reduce their herring intake, herring consumption has been decreasing for decades in parallel with the discussion on the dioxin risks of herring. Thus, definitive conclusion on this point is not possible.)
  • There are still large uncertainties in both scientific and value-based issues. However, our results show that robust conclusions about decision options can be made with the current information. Also, it seems that there is no single source of additional information that would reveal crucial insights into this issue. In other words, there seems to be little or no value in postponing recommendations in the hope that we would, in the near future, learn something that would help us make wiser decisions.

The conclusions above are based on health considerations only. If we include economic, cultural, and food security aspects into this consideration, we can argue that:

  • The price of Baltic herring for food is clearly higher than price of herring for feed. Therefore, for fishing industry it would be beneficial to start catching more fish for human consumption and therefore effects are synergistic with those of health.
  • In many areas around the Baltic Sea, Baltic herring has high cultural value as a food and as a tradition. An increase in consumption would help maintaining the culture, and vice versa.
  • Baltic Sea could be an important source of human food, but currently it is rather a source of animal feed. If dioxin-based food regulations were abandoned, it would be easier to develop the Baltic Sea as a food reserve.


Schematic picture of the health benefit-risk model for Baltic herring and salmon intake.
Detailed modelling diagram of the health benefit-risk model. Green nodes are original data, red nodes are based on scientific literature, and blue nodes are computational nodes. Those with a number are generic nodes designed to be used in several assessments. the number refers to the page identifier in Op_en wiki (this Opasnet wiki). Nodes with red borders are places where it is possible to aggregate an assessment of random individuals to population-level examination. At those points, individual variation disappears and only population-level uncertainty remains in the model. This aggregation is done with mc2d function, but it is NOT used in the default model runs and therefore all results currently presented on this page are based on individual-level assessments.


Who will be affected by the decisions?

  • Professional fishers and their organisations
  • Anglers and other recreational fishers and their organisations
  • Land owner fishers and their organisation (they have inherited rights)
  • Saami people also have inherited rights (in Sweden only?)
  • Food and fish industry.
  • Mink and fox farmers
  • All people utilising recreational values of the Baltic Sea (relates to eutrophication)
  • Farmers and agricultural sector
  • Consumers of fish
  • Producers of fish oil and fish meal
  • Baltic Sea RAC (Regional Advisory Concil) represents fishers (located in Copenhagen)
  • Hydropower plant owners

Who will affect the decisions?

  • Food safety organisations (EVIRA, Livsmedelsverket, ...)
  • Ministries (of agriculture, environment, and commerce)
  • EU: DG Mare, EU Parliament?
  • SWAM (Swedish Agency for Marine and Water Management)

Who are interested in the decisions?

  • Scientists
  • Environmental NGOs
  • Bureaucrats
  • ICES (International Council for the Exploration of the Sea)
  • Helcom


The assessment model is implemented in a modular way in Opasnet. In practice, this means that the data and code used for different parts of the model is located at different pages in Opasnet. In this section, we give the overview and links to the module pages, and all details can be found from there. The whole idea of Opasnet is that different modules can be used in different assessments simultaneously, and that updates in any module are fully reflected in all assessments when they are rerun.

The assessment of consumption of fish was based on a survey conducted by Taloustutkimus Ltd in the four study countries. Around 500 adults were recruited from each country, and consumption of fish, especially that of Baltic salmon and herring, was asked. Also, we asked reasons for eating or not eating fish and factors that would increase or reduce fish consumption. Gender and age (18-45 or 45+) were separated in the model.

Concentrations of dioxins and PCBs in fish were based on EU Fish 2 study conducted by THL in 2009. The results were based on pooled and individual fish samples (98 Baltic herring and 9 salmon samples) and analysed for 17 dioxin and 37 PCB congeners. Toxic equivalent quantities (TEQ) were used by multiplying each congener concentration with its potential to induce dioxin-like effects (toxic equivalency factor, TEF) and summing up. Size-specific concentration distributions were estimated for salmon and herring, and dioxin and PCB TEQs using linear regression and hierarchical Bayesian modelling using R (version 3.4.3 and JAGS package, Herring sizes and dioxin concentrations in different scenarios came from the fish growth model by SLU applied in BONUS GOHERR project; those results are published elsewhere[2]

Other concentrations. Concentrations of beneficial nutrients in fish were based on published data and a dataset obtained from the Finnish Food Safety Authority Evira. Mercury concentrations in fish in Finland were based on Kerty database produced by the Finnish Environment Institute.

Exposures to pollutants and nutrients were simply products of consumption amounts and concentrations in the consumed fish. An exception to this were the infant's exposures to dioxin and methylmercury during pregnancy and breast-feeding, as they were derived from the mother's exposure using simple toxicokinetic models.

Exposure-response functions were derived for all relevant pollutants and nutrients. Exposure-response functions of dioxins were derived for several endpoints. Tooth defects were based on an epidemiological study in Finland[3]. Cancer morbidity was based on U.S.EPA dioxin risk assessment[4]. Tolerable daily intake was based on EC Scientific Committee on Food recommendation[5]. Exposure-response functions for omega-3 fatty acids on coronary heart disease and stroke mortalities were from a previous risk assessment[6]. Exposure-response function of methylmercury on child's intelligence quotient was based on a previous risk assessment[7]. Exposure-response function for vitamin D was a step function based on the daily intake recommendations for adults in Finland[8].

Burden of disease was estimated in two alternative ways: if the burden of a particular disease in the target population was known, the attributable fraction of a particular compound exposure was calculated. If it was not known, the excess number of cases due to the exposure was estimated using health impact assessment, and this was multiplied by the years under disease per case and the disability weight of the disease. If the exposure-response function was relative to background risk of the disease, disease risks from Finland were used for all countries. Population data was from Eurostat ( Disability weights and durations of diseases were based on the estimates from the Institute for Health Metrics and Evaluation (, adjusted using author judgement when appropriate estimates were not available.

Model parameters

We assume that the background exposure is a uniform distribution between zero and the average Finnish intake for nutrients (according to the Finriski study). The typical nutrient intake from Baltic herring is subtracted from the average to avoid double counting.



  • Country (Denmark, Estonia, Finland, Sweden)
  • Year (current [concentration data from 2009 but projected to 2018], future)
  • Gender (female, male)
  • Age (18-45 years, >45 years)
  • Fish species (Baltic herring, Baltic salmon)
  • Health end-point (coronary heart disease and stroke mortality, tooth defect caused by dioxins, intelligence quotient change in child of a pregnant or nursing woman, exceedance of tolerable daily intake of dioxin, cancer morbidity, and compliance with vitamin D recommendation)
  • Compound (TEQ (PCDD/F and PCB), Vitamin D, Omega3 (includes EPA and DHA), MeHg)


This section will have the actual health benefit-risk model (schematically described in the above figure) written with R. The code will utilise all variables listed in the Dependencies section above. Model results are presented as tables and figures, and the most important ones are shown on this page.

  • 20.8.2019: Archived previous models that used old HIA model with casesabs and casesrr ovariables. The following codes were removed from the current page:
  • 18.5.2017: Archived exposure model Op7748/exposure by Arja (used separate ovariables for salmon and herring) [5]
  • Sketches about modelling determinants of eating (spring 2018) [6]
Manuscript graphs
  • [7]
  • Model run 29.8.2019 [8]
  • Model run 1.9.2019 [9]
  • Model run 10.9.2019 [10] [11]
  • Model run 11.9.2019 official [12]
  • Model run 19.9.2019 with agent-specific disease burdens [13]
  • Model run 24.9.2019 with EPA 2004 CSF. New official [14]

+ Show code

All result graphs

+ Show code

Initiate model

  • Model run 27.7.2019 with oempty [15]
  • Model run 21.8.2019 [16]
  • Model run 29.8.2019 without groups function [17]
  • Model run 4.9.2019 with paramtable [18]
  • Model run 9.9.2019 with new InpBoD from IHME [19]
  • Model run 11.9.2019 official [20]
  • Model run 23.9.2019 [21]

+ Show code

Other codes

See also

  • Sara M. Pires, Géraldine Boué, Alan Boobis, Hanna Eneroth, Jeljer Hoekstra, Jeanne-Marie Membré, Inez Maria Persson, Morten Poulsen, Juliana Ruzante, Jacobvan Klaverena, Sofie T. Thomsen, Maarten J. Nauta. Risk Benefit Assessment of foods: Key findings from an international workshop. Food Research International, Available online 10 September 2018. doi:10.1016/j.foodres.2018.09.021
  • Goherr:5.4 Benefit-risk assessment of previous, current and future fish intake
  • Omega-3 content in salmon
  • Risk and Benefit Assessment of Herring and Salmonid Fish from the Baltic Sea Area: National Food Agency in Sweden performed a risk assessment about the Baltic herring exemption in 2011 and concluded that "In conclusion, a cessation of the exemption from maximum limits would be more beneficial from a public health point-of view than a continued exemption. In the case of no exemption there would be a decreased exposure of the population to dioxins and dl-PCB without any limitation of the intake of beneficial nutrients." The conclusion was based on two criteria: comparison of TWI and intake in women in childbearing age and in children; and a view that large herring with high dioxin levels can be banned and replaced with small herring with low dioxin levels without any other change.[10]
  • Swedish Market Basket 2010: Swedish Food Agency performed a market basket study and concluded that the per capita dioxin+PSB intake was 39 (28-49) pg/d TEQ in 2010. This is about one fourth of the tolerable weekly intake (140 pg/d TEQ in a 70-kg person), and therefore it was concluded that such levels do not markedly increase the risk of health effects[11].
  • Riksmaten 2010
  • Danskernes kostvaner 2011-2013
  • Assmuth Timo and Jalonen Pauliina 2005: Risks and management of dioxin-like compounds in Baltic Sea fish: An integrated assessment. Nordic Council of Ministers, Copenhagen. Assmuth Jalonen Dioxin risk assessment 2005 [26]
  • EFSA 2012. Update of the monitoring of levels if dioxins and PCBs in food and feed. EFSA Journal 10(7):2832. doi: 10.2903/j.efsa.2012.2832


  1. 1.0 1.1 1.2 Tuomisto, J.T., Asikainen, A., Meriläinen, P., Haapasaari, P. Health effects of nutrients and environmental pollutants in Baltic herring and salmon: a quantitative benefit-risk assessment. BMC Public Health 20, 64 (2020).
  2. 2.0 2.1 Mia Pihlajamäki, Arja Asikainen, Suvi Ignatius, Päivi Haapasaari and Jouni T. Tuomisto. Forage Fish as Food: Consumer Perceptions on Baltic Herring. Sustainability 2019, 11(16), 4298;
  3. 3.0 3.1 Satu Alaluusua, Pirjo-Liisa Lukinmaa, Terttu Vartiainen, Maija Partanen, Jorma Torppa, Jouko Tuomisto. (1996) Polychlorinated dibenzo-p-dioxins and dibenzofurans via mother's milk may cause developmental defects in the child's teeth. Environmental Toxicology and Pharmacology Volume 1, Issue 3, 15 May 1996, Pages 193-197. doi:10.1016/1382-6689(96)00007-5
  4. U.S.EPA. Guidance for Assessing Chemical Contaminant Data for Use in Fish Advisory. Volume 2: Risk Assessment and Fish Consumption Limits, 3rd Edition. 2000. Table 3-1.
  5. EC Scientific Committee on Food. (2001) Opinion of the Scientific Committee on Food on the risk assessment of dioxins and dioxin-like PCBs in food. CS/CNTM/DIOXIN/20 final [1]
  6. Cohen, J.T., PhD, Bellinger, D.C, PhD, W.E., MD, Bennett A., and Shaywitz B.A. 2005b. A Quantitative Analysis of Prenatal Intake of n-3 Polyunsaturated Fatty Acids and Cognitive Development. American Journal of Preventive Medicine 2005;29(4):366–374).
  7. Cohen JT, Bellinger DC, Shaywitz BA. A quantitative analysis of prenatal methyl mercury exposure and cognitive development. Am J Prev Med. 2005 Nov;29(4):353-65.
  8. Finnish Nutrition Recommendations 2014 [2]
  9. Institute for Health Metrics and Evaluation. (2019) Disability weights for GBD2017 study. Accessed 27 March 2019.
  10. Anders Glynn, Salomon Sand and Wulf Becker. Risk and Benefit Assessment of Herring and Salmonid Fish from the Baltic Sea Area. Report 21/2013. Livsmedelsverket, Sweden.[3]
  11. National Food Agency. Market Basket 2010 - chemical analysis, exposure estimation and health-related assessment of nutrients and toxic compounds in Swedish food baskets. Report 7/2012. Livsmedelsverket, Sweden. [4]



Normative scenarios
paths you need to take to reach a defined goal
Expolorative scenarios
identify key uncertainties and dependencies to describe coherent paths into the future.
Governance types
How things are managed (e.g. top down command or co-management).
Management action
Actions to be taken based on decision-maker's decision (i.e. decisions)

See also

Goherr Research project 2015-2018: Integrated governance of Baltic herring and salmon stocks involving stakeholders

GOHERR logo NEW.png Goherr public website


WP1 Management · WP2 Sociocultural use, value and goverrnance of Baltic salmon and herring · WP3 Scenarios and management objectives · WP4 Linking fish physiology to food production and bioaccumulation of dioxin · WP5 Linking the health of the Baltic Sea with health of humans: Dioxin · WP6 Building a decision support model for integrated governance · WP7 Dissemination

Other pages in Opasnet

GOHERR assessment · Goherr flyer · Goherr scenarios · Relevant literature: policy · dioxins · values


Exposure- response functions of dioxins · Fish consumption in Sweden · POP concentrations in Baltic sea fish · Exposure-response functions of Omega3 fatty acids

Methods Health impact assessment · OpasnetBaseUtils‎ · Modelling in Opasnet
Other assessments Benefit-risk assessment of Baltic herring · Benefit-risk assessment on farmed salmon · Benefit-risk assessment of methyl mercury and omega-3 fatty acids in fish · Benefit-risk assessment of fish consumption for Beneris · Benefit-risk assessment of Baltic herring (in Finnish)
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