6 
>, i 
\ > 
\ 
for ocaan reefs and 0*129 for the lagoon reefs before Able bay. After 
Able and Baker Days the index for 6 stations at Bikini was 0.143 for Ooean 
reefs and for 1 lagoon reef 0.128. *rom these data we conclude that up to 
August 31 no detectable reduetion or change occurred in the relative 
abundance of the reef fishes at Bikini Atoll after the atom bomb tests. 
The fluctuations in the value of the index among the various stations is 
about what should be expeoted in the sampling of sgeh fisty/ populations. 
Since there was no tine available for sampling of the ooean surf 
and shallow water tidal pools after Baker Day no comparisons with these 
can be made* 
Although the index of relative abundance s hows no definite 
1 4 % 1 < • *, « 
ohange in the reef fish populations at Bikinis it must not be assumed that 
the reef- fishes have not been affected by the radioactivity resulting from 
. * • ' J *• ' * * t 4 4 ’ , . \ ’ • , V 
the Baker Day test. headings observed with geiger counters at the time 
post Baker collections were made revealed that a number of fishes were 
^ * t Via ■ . ■ . *• • * ■ \ * ; • .• » /*’ *. * *» 
radioactive in the following collections! 
S-46-307 lagoon side Amen Id* Aug. 4. Above 2 UR. 
S-46-308 lagoon side Airukiiji Id* Aug. 7* Not above 2 MR* 
S-46-390 lagoon side Namu Id* Aug* 9* Not above 2 UR* 
3-46—332 lagoon side Roer Id* Aug* 2* Above 2 MR* 
S-46-349 Ocean reef BV? end Bikini Id* Aug* 14. Not above 2 MR* 
5-46-361 Ooean reef Cherry Id. Aug. 16. Above 2 ®. 
S-46-382 Ocean reef SW end Oruk Id* Aug* 16* Above 2 MR* 
S-46-383 Ocean reef K end Boby Id* Aug* 17. Above 2 MR* 
