shell variable in position
b.
Snails:
(1)
<
3
4)
c.
“liver"
gill
mantle
muscle
Octopus (one specimen):
2
2
3
d.
Hermit crabs:
1
2)
3)
4)
e.
True crabs:
Species Differences.
2)
2)
4)
"liver"
gill
muscle
digestive tract with contents
"liver"
gill
muscle
carapace variable in position
digestive tract with contents
and (3)
wusele
liver or gill
carapace variable in position
There were not enough samples at
any one island to reliably determine species differences.
It is probable, however, that both species and individual differences are considerable as is indicated by the data from the
two similar species of sea cucumbers presented in Table 8.
At Rigili and Igurin where several specimens of crabs
were taken (not more than two of one: species), differences
within a species are as great as between species.
Tissue for
tissue the land hermit crabs, Cenobita, may have a higher
specific activity than the shore crabs.
Conclusions.
The most obvious and striking conclusion
is that there was great variability in the amount of radioactivity found in invertebrates at every station sampled.
The distribution of radioactive materials was evidently still
in a state of considerable flux eight days after the shot.
Surface contamination or the presence of radioactive material
~ 42 -
a:
;
TM
AN