- 33-
Pigure 26 and Table 17 show
crab decays.
Carapace of Coenobita
ie emphasized, but other tissues
reg
are included, as well as @ curve
for carapace of the ghoat crab,
Qeypode, for comparison.
dist
(Pig
pers
There 13 a pronounced leveling with time, indicating an unusually high content of long-lived
{sotopes.
The two-point slopes
define limits within vhnich intermediate points must have occurred,
following the pattern of corresponding multi-point curves, and
which are included to show the
transition from the slow decay of
pre-Nectar samples to the more
rapid decay of later samples.
An
uptake pertod of 1 to 2 weeks for
the isotopes remaining at the time
of counting the decays itn Pigure
each
26 is suggested by the increase in
slope of successive curves with
time of collection after Nectar.
Held (1957:8) shoved that re-
count in Pebruary 1956 of all
semples of carapace where all of
the activity was due to $r9J-y¥90
geve uniform values of d/m/g regardiess of date of collection.
He concluded that equilibrium in
the uptake-excretion process had
veen reached.
The same phenomenoo wes noted abowe for clam kidney
and for all snail semples.
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No significant differ-
ence can be shown between decline
and decay using the available data.
OIsIs BENZ Z
about equal.
Fiete Organion and tleaue
@ onsen ne
Paucity of decay data in the
first 100 days precludes adequate
comparison with the early portion
of the decline curves.
After 100
days post-Nectar the variability
in the decline curves is too great
to permit of definite conclusions,
but decline and decay sppear to be
_
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paring curves 16 and 26.
Retee of redicesiies éesey referres te nester,
af complies ef svete ot Boilie
whte Por Figure 6
C8 4e SO eee
Carapace of Coenobita and
Ocypode showed similar decay
patterns as may be seen by com-