|Title||Coconut crab found on Bikini Island, on the deck of the ship RAN-ANNIM, summer 1964 |
|Photographer||Sneddon, James O. |
|Notes||Images documenting the Radiological Survey of Eniwetok, Bikini and Rongelap Atolls between July and September 1964.|
Caption with image: The coconut crab pulls a piece of burlap with one of its powerful claws on a hatch cover of the Ran-Annim. A coconut is under the other claw.
S-9268-[1A or 2]
Radiological Survey of Bikini, Eniwetok and Rongelap Atolls, Volume 3, p. 20.
|Scrapbook Notes||The Coconut Crab|
One of the big, blue-black coconut crabs (Birgus latro) was picked up on Bikini Island and taken aboard the Ran-Annim. The coconut crab is the one food item in the test atolls which still retained radioactive materials in significant amounts six years after the end of testing. The reason for this was made clear by Edward E. Held of the Laboratory who studied the moulting behavior of the crabs after bringing some home from earlier trips to the Pacific.
The crab absorbs radioactive strontium-90, along with minerals required to build its exoskeleton. The radioactive material is deposited in the shell. It seems as though the crab would get rid of this radioactive material when it moults. But Held, "peeking" at his captive crabs, discovered that the crab eats the old shell completely in the first days after it is shed. So the radioactive material is picked up again and again.
|Source||Radiological Survey of Bikini, Eniwetok and Rongelap Atolls |
|Subjects (LCTGM)||Crabs--Marshall Islands--Bikini Atoll|
|Location Depicted||Marshall Islands - Bikini Atoll |
|Digital Collection||Lauren R. Donaldson Collection|
|Order Number||DON0218 |
|Ordering Information||To order a reproduction, inquire about permissions, or for information about prices see: http://www.lib.washington.edu/specialcollections/services/reproduction-info Please cite the Order Number when ordering. |
|Repository||University of Washington Libraries. Special Collections Division. |
|Repository Collection||Lauren R. Donaldson Papers. Accession No. 2932-007, Box 23 |
|Object Type||Photograph |
|Digital Reproduction Information||Scanned from a photographic print using a Microtek ScanMaker 9800XL at 100-250 dpi in JPEG format, saved at compression rate 3 and resized to 768x600 ppi. 2007. |