Alaska: unidentified outbreak kills dozens of ringed seals- Walruses ill as well - Ribbon seal found with syndrome 3/12

[Emily]

Re: Alaska: unidentified outbreak kills dozens of ringed seals- Walruses ill as well - Ribbon seal found with syndrome 3/12

http://www.alaskadispatch.com/article/20140512/investigation-walrus-disease-closes-no-culprit-identified

Investigation into walrus disease closes with no culprit identified
Yereth Rosen
May 12, 2014

...
The potential causes looked into during the investigation of the mortality event included biological infections, viral infections and endocrine disruptions. Also investigated was the possibility of contamination from the Fukushima nuclear plant after the 2011 Japanese earthquake and tsunami disaster. A preliminary investigation in 2012 concluded that radioactive contamination was not the likely cause.

Investigators are now looking at the possibility of multiple causes, Speegle said. ?At this point, the theory is that a number of factors contributed to the illness,? she said....

Multiple causes? The final report should include all the data found in testing. I'd like to know what factors were unique in starting in 2011 among those in the theory.