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~ex. fe debonation of shotone: at Bikini Atoll’on March.1,-
1954, pradused a: fallout: of. radioactive: ash upon RongelapAtoll,
marshall Islands... The distribution of theradioactiveash on
the islands andin the. plants and animals ofthe erea has bean
studied and evaluated. by. the. Applied FisheriesLaboratory,
tativersity of Washington.°°.
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During the first expedition to Rengelap Atoll on March 26,
1954, biological ganplas were collected and measurements made of
the radiation contemination,
Gn three additional expeditions
extensive collections of material were made for this study, the
last on January 25-30, 1955.
the decline in radicactivity was measwred in 1499 samples
of fish, Invertebrates, land plants, algae, birds, plankton,
gol] and water from the Rongelap area.
During this atudy particular emphasis was placed upon evaluation of the radioactivity in food used by the natives,
Coconut
milk collected on March 26, 1954, contained 1.03 mierocurles per
Kllogram of wet tissue while the eceonut meat had 1.16 uc/k.
By
January 25«30, 1955s the level in coconut milk had declined to
0.041 uc/Ac and the meat to 0,036 uc/k. Fish muscle on March 26,
1954, averaged 2.74 uc/c and fish liver 204. uc/c, The decline
to January 25-30 wes 0.10 ue/c for the muscle and 3.52 ue/k for
. the liver of fish, Somewhat similar declines were found for
glam muscle, crab muscle, bird muscle and liver, and for squash,