This chart is from Woods Hole. I annotated it, since their description of different rates of plutonium absorption was verbal and very hard to track, seems intentionally so.
Then I tried to come up with actual radiation measurements in the water and the animal life. The link below has decent water data, and some limited fish and ocean biota.
This report from Woods Hole Oceangraphic Institute is interesting to read. Of course they always end with “Further research is needed”, LOL as giving them more money is their prime objective.
Interesting though….rather then doing testing on Marine Life, they do a lot of testing on water and they do modeling of ocean flows, and it seems a prime objective is to calculate the “source term” of what came out of Fukushima. This Source Term is an estimate of what and how many radionuclides left the buildings. Is seems odd but I guess that is what scientists do….calculate things.
But since they are in the ocean on a boat equipped with advanced radiation analysis equipment, and the ability to catch fish. It sure seems like my prime focus would be to test the fish! And the bait crops.
The above is the main article. You need to do quite a bit of bouncing around to get to the meat of that data.
Chart below shows that contaminated water does not mix vertically much. The radiation stays in the top 300 feet primarily. It stays where 95% of the fish and critters stay. It stays where it can do the most damage.
Finally, the bogeyman that no one wishes to speak of. Strontium. Strontium goes into bones and becomes a permanent part of the food chain.
This article states that the Strontium can be present in same levels or more, than the Cesium.
Radiostrontium in the western North Pacific: characteristics, behavior, and the Fukushima impact.
The impact of the Fukushima-derived radiostrontium ((90)Sr and (89)Sr) on the western North Pacific Ocean has not been well established, although (90)Sr concentrations recorded in surface seawater offshore of the damaged Fukushima Dai-ichi nuclear power plant were in some areas comparable to or even higher than (as those in December 2011 with 400 kBq m(-3)(90)Sr) the (137)Cs levels. The total amount of (90)Sr released to the marine environment in the form of highly radioactive wastewater could reach about 1 PBq. Long-term series (1960-2010) of (90)Sr concentration measurements in subtropical surface waters of the western North Pacific indicated that its concentration has been decreasing gradually with a half-life of 14 y. The pre-Fukushima (90)Sr levels in surface waters, including coastal waters near Fukushima, were estimated to be 1 Bq m(-3). To better assess the impact of about 4-5 orders of magnitude increased radiostrontium levels on the marine environment, more detail measurements in seawater and biota of the western North Pacific are required.
- [PubMed – indexed for MEDLINE]
We also know this from our work on estimating the overall source term of all the nuke waste at Fukushima. The strontium is about equal to the cesium.
Finally a link to some prior work I had done on the bioaccumulation, aka biomagnification on sea life in Alaska. Alaska was hit particularly hard by the Fukushima fallout, in fact, Fukushima increased the radiation in sea life the same way a direct nuclear bomb test did at point blank range.
Wrap your head around that.
From Alaska 2011 June
The soil and lichens have VERY high radioactivity. 6000 Bq /kG!
Here is the full report you can download.
“…* Uranium-234 — 3.854 pCi/kg Dolly Varden
* Uranium-234 — 5.312 pCi/kg Goose Egg no shell
* Uranium-234 — 3.466 Ci/kg Gull egg
* Uranium-234 — 4.96 pCi/kg Chiton
* Uranium-234 — 9.344 pCi/kg Dragon Kelp
* Uranium-234 — 7.885 pCi/kg Rockweed
* Uranium-234 — 4.906 pCi/kg Greenling
* Uranium-234 — 2.304 pCi/kg Halibut
* Uranium-234 — 58.721 pCi/kg Horse Mussel tissue
* Uranium-234 — 8.86 pCi/kg Irish Lord
* Uranium-234 — 7.127 pCi/kg Octopus
* Uranium-234 — 4.976 pCi/kg Pacific Cod
* Uranium-234 — 4.644 pCi/kg Rockfish
* Uranium-234 — 3.032 pCi/kg Reindeer Lichen
* Uranium-234 — 3.906 pCi/kg Sea Urchin
* Plutonium-239 — .039 pCi/kg Dolly Varden
* Plutonium-239 — .186 pCi/kg Goose Egg no shell
* Plutonium-239 — .104 pCi/kg Gull egg
* Plutonium-239 — .298 pCi/kg Chiton
* Plutonium-239 — .093 pCi/kg Dragon Kelp
* Plutonium-239 — .084 pCi/kg Rockweed
* Plutonium-239 — .379 pCi/kg Greeling
* Plutonium-239 — .038 pCi/kg Halibut
* Plutonium-239 — 4.194 pCi/kg Horse Mussel tissue
* Plutonium-239 — .378 pCi/kg Irish Lord
* Plutonium-239 — .036 pCi/kg Octopus
* Plutonium-239 — .05 pCi/kg Pacific Cod
* Plutonium-239 — .279 pCi/kg Rockfish
* Plutonium-239 — .152 pCi/kg Reindeer Lichen
* Plutonium-239 — .195 pCi/kg Sea Urchin
* Plutonium-240 — .039 pCi/kg Dolly Varden
* Plutonium-240 — .106 pCi/kg Goose Egg no shell
Source: Nuke Pro
* Plutonium-240 — .069 pCi/kg Gull egg
* Plutonium-240 — .149 pCi/kg Chiton
* Plutonium-240 — .037 pCi/kg Dragon Kelp
* Plutonium-240 — .02 pCi/kg Rockweed
* Plutonium-240 — .189 pCi/kg Greeling
* Plutonium-240 — .012 pCi/kg Halibut
* Plutonium-240 — 2.097 pCi/kg Horse Mussel tissue
* Plutonium-240 — .189 pCi/kg Irish Lord
* Plutonium-240 — .021 pCi/kg Octopus
* Plutonium-240 — .015 pCi/kg Pacific Cod
* Plutonium-240 — .139 pCi/kg Rockfish
* Plutonium-240 — .091 pCi/kg Reindeer Lichen
* Plutonium-240 — .117 pCi/kg Sea Urchin