30,000 - ,055 wi85 L_ A - 39 plankton B3 plankton 25,000 | c - 38 plankton [—- 20,000 + = 15,000 c/M Arbitrary Units - — = 1 t 10,000 ( ! 1 ! ! } 5,000 a) L 2 ¥ 1,000 Ria 1 Fig. 2. At 51 2 a) MEV (a =~ sare 4 5 Gamma spectrum curves of plankton samples collected at stations 3, 38 and 39 during the Collett survey.