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Discussion of Results » 
In order to determine the lethal effects of the atom bombs on 
the relative abundance of reef fis b/f{ populations in Bikini and adjacent 
atolls it vas planned to ocoupy numerous rotenone poisoning stations on 
Bikini Atoll reefs and in adjacent atolls as controlls. 
In the use of the rotenone poison it was not intended to do so 
much poisoning that measurable damage would result to the fish fauna and 
might be detectable after the bomb blasts* Poisoning stations were thus 
well separated but their location depended largely on accessability of the 
reef and suitable habitats for working* this made it necessary to looate 
the stations close to the islands on which landing was feasable. .The 
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broad flat expanses of the reefs, where the water flows over in large 
quantities at high tide ha£ little or no cover for fishes and is unsuitable MR 
measuring fish abundance by the poisoning method developed by Dr• Schultz 
i ffr^ 
during 1939 and applied to this problem during 1946. The stations selected 
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represent the best habitats that were available in the area visited and 
were selooted after careful reconnaissance. 
The habitats worked have been tentatively classified as follows* 
(1) Outer edge of ocean reef in surf among corals, channels* and with algae# 
This zone is about 50 to 75 feet wide in most localities* (2) Ocean reef 
with corals 1 to 4 feet high, some algae, with narrow to wide channels or 
spaoes between* or soattefted coral heads, and with the water 2 to 5 feet 
deep at low tide. Bottom usually sandy. (S) Imgoon reef with corals, 1 
to 5 feet high, some algae, narrow channels or crevices, or with scattered 
coral heads* with water 1 to 6 feet deep^ oooasionaly deeper* Bottom usually 
s andy* (4) Shallow tidal pools, high up on the reef, usually not over 
1 l/2 feet deep* isolated at low tide, with scanty growth of corals or none* 
(5) Pondlike tidal pool connected with lagoon at high tide* 
