10
rurther,
the aversuce jJevel of activity in plankton from
a
Atlin dinar Vagoon tn Ovtober 1975 wis noted (UWPL-44:44) to be
high or thao in Ronzelap Lag¢con on the wet weignt basis.
3ut if
wie railo.sgtivity per unit of asi weight instead of wet weight is
used,
tie ALlinginae devels a:se no higher than in Renerelap Lagoon
reir K oclle Isiand (Table 1).
this,
om
it seems desirable to report radioactivity of plankton
oun ash weight basis, even though otner organisms and substances
Mle.) Mor Gesiratiy Le considered on a wet weight basis.
Fasure 2 shows the trend of radioactivity in the plankton
gampi 2 Trom Rongeiap Lavoon (from 1954 through 195&) related to
tinue,
esl 2 207-005) Dot of Lhe beta agtivity on an ash weight
tants
.
Jetematned wlth a cietnane Plow counter.
Tatdes
|
and 3 .
oa
nye doctec
Data are from
line showing a decline slope of -3.5
wa fitted py Inspection to tne minimal points near 360, 600 and
1oG2 G9 2c,
pein s remeved
w Pir as possible from the effects of
Meonavinsm lever. of tha lageen plankton a day or cwo after
j mcino.,
Tt nay ve cotfectaped Ly; extrapolating baci: one cycle
gnofbrape 4.
yo.
Tl ts eviuentl thet maxima mast have teen at least
tf of ack.
?
«
hw
Tr
times 26
ey
Viney
4
coy
mob
te
,
a7)
OL
mw
tf
ee
tribuctec Log
We
a
Kotlaep refepencea ©) Flaure > shows that Rrivo must have conas men vettivity as Redwing,
much as Hardtacx.
pattern.
and Redwing 20 to
Tne decline picture ts character-
Rises result from the fallouts,
sveen Goeclines until the next fallout.
foilowed by
An exception appears in the
' F038.