General information
During the early 1980’s, the North Slope Borough Department of Wildlife Management (DWM) initiated work on contaminant levels in bowhead whales. Concerns about contaminants increased, in part due to results of work on animals in other areas in the Arctic that showed very high levels of contaminants from man-made sources. Therefore, the DWM began an intensive study to determine the levels of various man-made and naturally occurring substances to help better understand questions about levels of contaminants in our environment and animals of the North Slope.
For a number of years, scientists of the DWM, along with visiting scientists and graduate students, collected tissues from various subsistence species from Alaska’s North Slope through the cooperation of Alaskan Native hunters. The DWM began its now internationally recognized intensive study of contaminants in 1995, led by Dr. Todd O’Hara, due to growing concerns of local residents regarding the effects of environmental contamination on their traditional subsistence foods and wildlife resources. Dr. O’Hara reviewed the Department work started by Dr. Tom Albert and expanded the efforts to eventually include documenting the nutritional benefits of North Slope traditional subsistence foods, starting with the bowhead whale.
Many locally caught marine and terrestrial mammals, seabirds, and marine and freshwater fish have been tested for contaminants, including organochlorines (like PCB and DDT), polyaromatic hydrocarbons (PAH—contamination from oil), heavy metals (like mercury and lead), and radionuclides (or radioactive particles).
Results of these studies show that, for the most part, contamination of northern Alaskan animals is low compared to other areas of the Arctic. At this time the levels of these contaminants are recognized as below levels of concern. This is all good news and we have local documentation that our traditional foods are healthy.
There is a need to continue to monitor the levels for these contaminants over time, in order to determine if levels are increasing, decreasing, or staying the same. As we gather new data, additional information will be added to this site. Specific studies on bowhead whales and fish and other species are found on other webpages on our site. Below you can read about general information on the contaminant levels and the nutritional value of subsistence foods on the North Slope.
Bertha Leavitt, Eunice Leavitt and Mary Brower at Apugauti in Barrow
Serving of fish quaq, maktak and whale meat. Photo: Craig George
Links
Contaminants and Nutrients in Subsistence Foods: Common Language Report
Project Leaders | Taqulik Hepa, Cyd Hanns, Cheryl Rosa, D.V.M, Ph.D. |
Collaborators | Todd O’Hara, D.V.M., Ph.D., Victoria Woshner, D.V.M., Ph.D.(NSB-DWM), Leslie Pierce (Barrow High School) |
Funding | Coastal Impact Assistance Program |
Summary:
This purpose of this project was to provide information on contaminants and nutrition of subsistence foods to the general public in a plain language format, based primarily on local research results. Students at Barrow High School helped in the form of science fair projects and an informational video production. Completed in 2006.
Project Title:
Contaminant and Nutrient Ecology in Coastal Marine Fish and Mammal Foods of Northern Alaska Residents: Development and Implementation of a Common Language Report and Presentation.
General Information:
Typically, contaminants are defined as impurities or substances that should not be present in the material under consideration. The word contaminant generally implies that a potentially harmful substance is present; and, their effect can depend on different factors such as: amount (or dose), type of contaminant, type of exposure, age of person, or type of organism exposed. Contaminants may be natural or man-made and occur to some extent in all food items whether store-bought or subsistence-gathered.
Research related to North Slope subsistence hunted animals indicates that:
- Levels of contaminants are generally low on the North Slope, and most are lower than other areas in the Arctic.
- The health benefits of eating North Slope subsistence foods are recognized to outweigh the risks of being exposed to low levels of contaminants.
- Nutrient levels confirmed that bowhead whale and other traditional subsistence foods provide many nutrients valuable to human health.
- Benefits include:
- Provide energy and contain many valuable nutrients.
- Promote good health.
- May convey a greater resistance to disease such as diabetes and heart disease.
- Help build blood and nerve cells.
- Build and repair the body and promote healthy immune systems.
- Benefits include:
- NIQIPIAQ (or local food) is SAFE and HEALTHY to eat and is essential to Iñupiat well-being.
- Eating traditional foods, combined with the healthiest of store-bought foods, and participating in traditional hunting, camping and sharing continues to benefit our way of life.
- The bowhead whale has among the lowest concentrations of organochlorine contaminants of any marine mammal studied in the world. It is a highly nutritious subsistence food.
An example of a Whaling Captain’s Open House serving
Although the levels of contaminants found in the North Slope overall are among the lowest in the Arctic, and the associated risks to human health are very low, it is important to continue to collect baseline contaminant data to monitor levels over time.
Report:
Booklet outlines the results of this project
During this project, information on serving sizes of bowhead whale by whaling captain’s during their open house was gathered. The information is outlined in the following charts.
Here’s some information on nutrients found in bowhead whale tissues (per 100 g serving):
Research reference papers:
- Hoekstra, P.F., et al. 2003. Enantiomer-specific biomagnifications of α-hexachlorocyclohexane and selected chiral chlordane-related compounds within an arctic marine food web. Environmental Toxicology and Chemistry 22(10): 2482-2491.
- O’Hara, T.M., et al. 2003. Investigation of heavy metals in a large mortality event in caribou of northern Alaska. Arctic 56(2):125-135.
- O’Hara, T.M., et al. 2004. Bowhead whale contaminants: A review of current state of knowledge and possible future research directions. Submitted as paper SC/56/E1 to the Scientific Committee of the International Whaling Commission, July 2004.
- O’Hara, T.M., et al. 2004. A preliminary assessment of the nutritive value of select tissues from the bowhead whale based on suggested nutrient daily intakes. Submitted as paper SC/56/E2 to the Scientific Committee of the International Whaling Commission, July 2004.
- O’hara, T.M., et al. 2004. Concentrations of persistent organochlorine contaminants in bowhead whale tissues, other biota, and store bought food from northern Alaska: Human exposure implications. Submitted as paper SC/56/E3 to the Scientific Committee of the International Whaling Commission, July 2004.
- Hoekstra, P.F., et al. 2005. Concentrations of persistent organochlorine contaminants in bowhead whale tissues and other biota from northern Alaska: Implications for human exposure from a subsistence diet. Environmental Research 98:329-340.
- O’Hara, T., et al. 2005. Concentrations of selected persistent organochlorine contaminants in store bought foods from northern Alaska: Human exposure implications. International Journal of Circumpolar Health 64(4):303-313.
- Rosa, C., et al. 2007. Vitamin A and E tissue distribution with comparisons to organochlorine concentrations in the serum, blubber and liver of the bowhead whale (Balaena mysticetus). Comparative Biochemistry and Physiology, Part B 148:454-462.
More journal articles on this topic can be viewed here for bowhead whales.
- CIFAR-funded Publications List – This document lists the relevant citations to the CIFAR “Feeding Ecology” project, which includes studies on: arctic fox (OCs and heavy metals); fish, seals and belugas (OCs and stable isotopes); three species of seals (heavy metals and stable isotopes), bowhead and gray whales (heavy metals and stable isotopes), and others.
Saying a prayer before serving the feast at Nalukataq in Barrow. Photo credit: Bill Hess
Updates on Contaminants in Subsistence Foods
Hydrocarbon Sensitivity in Waterfowl
- Riddle, Ann, et al. 2016. Assessing hydrocarbon sensitivity and establishing current CYP1A baselines in Arctic marine Birds and Waterfowl. Poster presented at the Alaska Marine Science Symposium, Anchorage, Alaska, January 2016.
Other Contaminant Studies
- Kucklick, J.R. et al. 2006. Persistent organic pollutants in Alaskan ringed seal (Phoca hispida) and walrus (Odobenus rosmarus) blubber. Journal of Environmental Monitoring 8:848-854. DOI: 10.1039/b602379g.
- Moses, S.K. et al. 2009. Organic nutrients and contaminants in subsistence species of Alaska: Concentrations and relationship to food preparation method. International Journal of Circumpolar Health 68(4):354-371.
- Dietz, R. et al. 2013. What are the toxicological effects of mercury in Arctic biota? Science of the Total Environment 443:775-790.
- Travis/Peterson Environmental Consulting, Inc., and Fisheye Consulting. 2015. Assessment of PCBs and DDTs in fish populations of the Colville River near the former Umiat Air Force Station, Umiat, Alaska. Report 1554-01 prepared for LINC Energy Operations, Inc, Anchorage, Alaska.
- Dasher, D., et al. 2016. Offshore Oil/Gas Wastewater Study: 2014 Assessment of Simpson Lagoon. Report prepared for Alaska Department of Environmental Conservation. pp. 36.
- Riddle, A.E. et al. 2016. Assessing hydrocarbon sensitivity and establishing current CYP1A baselines in Arctic Marine Birds and Waterfowl. Poster presented at the Alaska Marine Science Symposium, Anchorage, Alaska, January 2016.
More Information on Traditional Foods
Alaska Traditional Knowledge and Native Foods Database.
Alaska Native Tribal Health Consortium: Center for Climate and Health Bulletins – Go to this website for information on health concerns related to climate change. Here are some examples of bulletins that can be found on these websites:
- Brucellosis: Answers to Frequently Asked Questions.
- Brucellosis: Understanding an Important Arctic Infectious Disease.
Common Plants of the North Slope – This NSB-DWM webpage contains descriptions and pictures of some of the more common plants found on the North Slope. The descriptions include information on traditional uses of some plants.
Eating Well with Canada’s Food Guide – Go to this website from Health Canada for information on healthy eating. Download the Food Guide for First Nations, Inuit, and Métis.
First EIS Human Health Impact Assessment Wernham, A. 2007. Inupiat Health and Proposed Alaskan Oil Development: Results of the First Integrated HIA/EIS for Proposed Oil Development on Alaska’s North Slope. EcoHealth 4:500-513.
Iqaluich Niġiñaqtuat: Fish That We Eat – This report, written by Anore Jones, documents the traditional Iñupiaq knowledge of fish as food, including names, sketches, identification details, brief life histories, and recipes for gathering, preparation and use.
Nutrition Fact Sheet Series – Inuit Traditional Foods – Nutritional information on subsistence foods, produced by the Government of Nunavat for teaching good nutrition in schools and health centers.
Nunavut Nutrition – Go to this website for information on healthy choices for country foods and some store bought foods. You will find a Food Guide and some recipes. There is also a children’s coloring book.
Radiation and Wild Food Safety.
State of Alaska Epidemiology Bulletins:
- Use of Traditional Foods in healthy diet in Alaska: Risks in Perspective, 2004.
- Botulism Outbreak – Nome, January 2019.
Traditional Foods are Healthy Foods.
Food Security and Climate Change
Alaska Native Tribal Health Consortium: Center for Climate and Health Bulletins – Go to this website for information on health concerns related to climate change. Here are some examples of bulletins that can be found on these websites:
- Climate Change Effects on Traditional Food Cellars in Barrow, Alaska
- Climate Change Effects on Traditional Inupiat Food Cellars (Point Hope)
- Climate Change in Atqasuk, Alaska
- Climate Change in Nuiqsut, Alaska
- Climate Change in Point Hope, Alaska
- Climate Change in Wainwright, Alaska
- Source Drinking Water Challenges, Changes to an Arctic Tundra Lake (Point Hope)
Publications:
- Bradley, M., S. Kutz, E. Jenkin, T. O’Hara. 2005. The Potential Impact of Climate Change on Infectious Diseases of Arctic Fauna. International Journal of Circumpolar Health 64(5):468-478.
- Warren, J.A., J.E. Berner, T. Curtis. 2005. Climate change and human health: Infrastructure impacts to small remote communities in the north. International Journal of Circumpolar Health 64(5):487-497.
- Burek, K.A., F.M.D. Gulland, T.M. O’Hara. 2008. Effects of climate change on Arctic marine mammal health. Ecological Applications 18(2)Supplement:S126-S134.
- Parkinson, A.J., J.Berner. 2008. Climate change and impacts on human health in the Arctic: An international workshop on emerging threats and the response of Arctic communities to climate change. Summary of workshop held in Anchorage, Alaska, February 13-15, 2008.
- Berner, J., et al. 2016. Adaptation in Arctic circumpolar communities: food and water security in a changing climate. International Journal of Circumpolar Health 75:33820. http://dx.doi.org/10.3402/ijch.v75.33820.
- Huntington H.P., Quakenbush L.T., Nelson M. 2016. Effects of changing sea ice on marine mammals and subsistence hunters in northern Alaska from traditional knowledge interviews. Biology Letters 12:20160198. http://dx.doi.org/10.1098/rsbl.2016.0198.
- Akearok, G.W., K. Cueva, J.P.A. Stoor, C.V.L. Larsen, E. Rink, N. Kanayurak, A. Emelyanova, V.Y. Hiratsuka. 2019. Exploring the term “Resilience” in Arctic health and well-being using a sharing circle as a community-centered approach: Insights from a conference workshop. Social Sciences, DOI:10.3390/socsc8020045.
ICC Alaska and Food Security:
Alaskan Inuit Food Security Conceptual Framework: How to assess the Arctic from an Inuit perspective.
What Contaminants Are Found in the Arctic and How Do They Get Here?
Adapted from Arctic Monitoring and Assessment Programme
Contaminants of concern include:
- Persistent organic pollutants (POPs) – Industrial chemicals (ex: PCB), industrial byproducts (ex: dioxins, hexacholorobenzene), and pesticides (ex: DDT, chlordane).
- Heavy metals – Byproducts of fossil fuel combustion, waste incineration, mining processes (ex: Cadmium, mercury).
- Radionuclides – Releases from past testing of nuclear weapons, nuclear accidents, nuclear fuel reprocessing, and nuclear waste dumping and storage.
- Petroleum hydrocarbons – Spills or discharges from shipping, pipelines, drilling operations.
Pathways of contaminants to the Arctic
- Pathways of contaminants to the Arctic. 2005. In UNEP/GRID-Arendal Maps and Graphics Library.
- Persistent Organic Pollutants in the Arctic – Infographic (The Arctic Institute).
More Information on Petroleum Hydrocarbons
Go to this page (click here for the pdf version) or this page (click here for pdf version) on the CDC website.