Poster for Alaska Marine Science Symposium, Jan. 20, 2014: Based on modeled radionuclide concentrations the dose to Northern Pinnipeds on ice was less than the ERICA risk assessment no-effects level of 10 uGy/hr with the following caveats: 1) Source terms for the Fukushima nuclear accident release vary greatly creating uncertainty in the models. 2) Knowledge gaps exist on extrapolating radiation dose to marine mammals. 3) Exposure to hot particles was not addressed. 4) Cannot rule out that increased radiological exposure in combination with a mixture of other contaminants represented an immunotoxic and thyroid disease risk during the period the animals were living on the ice. 5) Ionizing radiation associated risk for skin defects (i.e. epilation, skin lesions) due to contact and external exposure can also not be excluded. *Marine transported Fukushima radionuclides entering the Bering and Chukchi Seas in the future may represent a new stressor to the ecosystem.
Nome Nugget, Jan. 2 2014: Hunters still report hairless seals — A Nome subsistence hunter reported the harvest of an oogruk showing symptoms of the disease that broke out in 2011 and left hundreds of seals hairless or dead. The breakout of the disease is still under federal investigation as an “unusual mortality event”. Symptoms of the disease included bald seals, skin sores and apathy.
NOAA, Feb. 2014: [...] seals reported with abnormal hair growth and healing skin ulcers are likely survivors of the initial disease. Hunters may continue to see hairless seals during spring 2014 [...] no specific infectious disease agent or process has been identified. This may suggest that the underlying cause of this disease is most likely complex, involving a variety of factors. [...] Scientists are investigating the possibility that radiation could have been one of many factors [...]
Nome Nugget, Apr. 10, 2014: [Gay Sheffield, Univ. of Alaska] has so far counted nine whale strandings, 25 dead walrus strandings, two sea lions and 18 seals. She also still collected data on Unusual Mortality Event suspected seals, showing hair loss, skin sores and delayed molt. Of those, she counted 10 spotted seals, eight ringed and six bearded seals. [...] [Officials] heard and adopted a resolution [...] that “the potential for pollution events includes oil spills, cargo or fuel spills, novel disease, invasive species, radiation [...] contaminants which can impact wildlife and can potentially be transferred to consumers is of high concern.” The resolution demands [...] research be conducted in the context of human health [...]
See also: [intlink id="researchers-ulcers-seals-walruses-alaska-after-fukushima-never-observed-before-reports-similar-problems-seals-northern-japan" type="post"]Researchers: Skin ulcers on Alaska wildlife after Fukushima were never observed before — Also reported in seals from Japan (AUDIO)[/intlink]
Published: May 6th, 2014 at 10:12 pm ET
- Mysterious affliction in Alaska polar bears suffering baldness and lesions; Rate spiked nearly 1,000% after Fukushima began — Gov’t: Ongoing reports of unusual number of ‘hairless seals’ with sores — “Seals continue to be reported with hair loss… it makes us nervous” (PHOTO) March 17, 2015
- Alaska: 28% of polar bears with skin lesions & hair loss, thyroids tested by gov’t… like symptoms in seals & walrus — Surprisingly high mortality of musk ox, weak immune system suspected — High rate of embryo deaths & bad eggs for geese November 18, 2013
- Alaska Professor on Radio: Fukushima fallout a suspected factor in ‘unusual mortality’ of seals and walrus — We couldn’t test for plutonium (AUDIO) January 28, 2014
- US Gov’t: “We don’t know what’s going on” in Pacific — Many ill baby seals being abandoned; Dozens of walruses found dead; Dying whales, birds, fish — “Unprecedented things happening” — Experts: “It’s been a very unusual marine mammal year… I’m really worried, very concerned” (AUDIO) August 7, 2015
- Conditions never seen before by scientists in Pacific seals and walrus — Thyroid cysts, lesions of reproductive system, retained placenta — Hunters concerned — Oceanographers to discuss radiation from Fukushima on Alaska radio tomorrow January 27, 2014