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.