Table 5. Station and water depth (feet) Rex Is. 45 Rex Is. 60 Radioactivity in algae and sand from the deep waters of Eniwetok lagoon. Date of collection 6/6/54 6/16/54 Algae 155. Lyngbya majuscula 434, Lyngbya sp., Dictyota Sp. mixture 8/8/54 Halimeda sp. 9/4/54 Halimeda gigas Elmer is. 9/9/54 ElmerIs. 140 Janet Is. 20 9/11/54 140 3/2/55 ElmerIs. 90 3/4/55 EdnaIs. 3/8/55 VeraIs. 3/9/55 60 20 Alga* Lyngbya majuscula Elmer Is. 50 Elmer Is. 135 , uc/kg dry weight Halimeda orientalis Caulerpa racemosa 5.4 464. 2.25 Lyngbya majuscula Caulerpa racemosa 11.4 0.99 4.8 6.6 Polysiphonia sp. Asparagopsis taxiformis 3.10 3.51 9.8 Halimeda gigas Halimeda opuntia 0.20 0.78 0.43 Polysiphonia sp. Lyngbya sp. Halimeda lacunulis Halimeda gigas Halimeda opuntia Polysiphonia sp. Halimeda opuntia 1.98 3.96 2.98 66. 96. 150. 430. 0.72 550. 0.53 * Multiplication factors used to convert wet weight to dry weight Asparagopsis 6.5 Dictyota 4.7 Caulerpa alimeda ** Radioactivity in algae Radioactivity in sand Lyngbya 3.1 Polysiphonia 4.3 Udotea 3.1 9.7 Padina 3.0 80. 13.5 2.39 12.9 Halimeda opuntia Ratio** 86. 48. Halimeda opuntia Halimeda monile Halimeda gigas Sand 6.1 .32 0.36 0.20 0.47 1.8 9.2 6.9 0.12 0.18 0.27 0.73 1.20

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