The effects of atomic radiation The effects of atomic radiation on oceanography and fisheries, report effectsofatomicr00nati Year: 1957 84 Atomic Radiation and Oceanography and Fisheries to a very fine state. Plutei of the sea urchin, Arbacia piinctnlata were put into sea water con- taining the radioruthenium which was kept in suspension by aerating the culture flask. After 18 hours, the larvae were rinsed and resus- pended in fresh sea water. Aliquots of larvae were then removed at intervals and tested for radioactivity (Table 5). A microscopic ex- TABLE 5 The Decrease of Ru^°* in Sea Urchin
The effects of atomic radiation The effects of atomic radiation on oceanography and fisheries, report effectsofatomicr00nati Year: 1957 84 Atomic Radiation and Oceanography and Fisheries to a very fine state. Plutei of the sea urchin, Arbacia piinctnlata were put into sea water con- taining the radioruthenium which was kept in suspension by aerating the culture flask. After 18 hours, the larvae were rinsed and resus- pended in fresh sea water. Aliquots of larvae were then removed at intervals and tested for radioactivity (Table 5). A microscopic ex- TABLE 5 The Decrease of Ru^°* in Sea Urchin Larvae as a Function of Time in non-radioactive water Radioactivity in 500 Hours larvae (counts/minute) 1 1413 4 179 8 148 amination of the larvae at zero time showed that the intestines were filled with the radioactive particulate material, but at 8 hours, very little material was left in the gut. Apparently little ruthenium was actually absorbed through the digestive tract. The ingestion of the particulate (co-precipi- tated) ruthenium by the bay scallop, Pecten irradians, also indicated that the radioactivity was mostly associated with the digestive tract. The crystalline style was highly radioactive, al- though the radioactivity in it decreased during the five days the scallops were kept in running water. The hepatopancreas, on the other hand, showed an increase in radioactivity during this time. No radioactivity was found associated with the internal organs other than those in the digestive tract. Third trophic level The uptake, accumulation, and loss of radio- nuclides has been studied in many fishes by both the and the These fishes include the skipjack tuna {Eiithynnus yaito), yellowfin tuna {Neothnnntts macrop- terus), dolphin {Coryphaena hip punts'), papio {Carangoides ajax), aholehole (Kuhlia sand- vicensis), Tilapia mozamhique, menhaden {Bre- voortia tyratinus), bluefish {Pomatomus salta- trix), little tuna (Euthynnus allitteratus), croak- ers (Mi
Size: 1849px × 1082px
Photo credit: © Bookworm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: archive, book, drawing, historical, history, illustration, image, page, picture, print, reference, vintage
