30,000 + & .055 wi85 A - 39 plankton : B- 3 plankton Cc - 38 plankton 222000 20,000 - | 15,000 c/M Arbitrary Units - L = 10,000 5,000 ae Tp 51 " |» M44 Ht 1,000 ! . —~_/ ~— + 2.2 Fig. 2. r 6B MEV _aarear AS Gamma spectrum curves of plankton samples collected at stations 3, 38 and 39 during the Collett survey.