Document Type: Analytic of a Report Language: English Journal Announcement: EDB8&808 Availability: NTIS, PC All1/MF AOl; 1. Subfile: ERA (Energy Research Abstracts); INS (US Atomindex inpyt). OMT (DOE contractor) ° Country of Origin: United States Country of Publication: United States ; Abstract: Roof rats and Polynesian rats, introduced to the atoll by 20th Century commerce and the Micronesians, respectively, were present allopatrically on the larger islets. Of necessity, they were largely vegetarians. Reproductive cycles were keyed to rainfall patterns. High density populations had high stress indices, including high parasite loads. The rats, at the top of the terrestrial food pyramid, constituted a bioenvironmental monitor that was rarely utilized during the several test programs. Bioconcentration of radioisotopes, especially /sup 137/Cs and /sup 60/Co, occurred; rats implanted with dosimeters were determined to function as environmental radiation monitors. They hypothesized that roof rats on Enjebi survived the nearby nuclear detonation. Analysis of plasma transferrins indicated greater heterozygosity in the northern atoll rat populations. The incidence of oral palatal ridge deformations also was positively correlated with environmental radiation levels, but other gross indications of radiation effect were not found. . Major Descriptors: *ENIWETOK -- BASELINE ECOLOGY; *RODENTS -- BIOLOGY; *RODENTS -- RADIONUCLIDE KINETICS Descriptors: BIOLOGICAL INDICATORS; BIOLOGICAL RADIATION EFFECTS; CESIUM 137; COBALT 60; FOOD CHAINS; POPULATION DENSITY Broader Terms: ALKALI METAL ISOTOPES; ANIMALS; BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; BIOLOGICAL EFFECTS; CESIUM ISOTOPES; COBALT ISOTOPES; ECOLOGY; INTERMEDIATE MASS NUCLEI; INTERNAL CONVERSION RADIOISOTOPES; ISLANDS; ISOMERIC TRANSITION ISOTOPES; ISOTOPES; MAMMALS 7 MARSHALL ISLANDS; MICRONESIA; MINUTES LIVING RADIOISOTOPES; NUCLEI; OCEANIA; ODD-EVEN NUCLEI; ODD-ODD NUCLEI; RADIATION EFFECTS; RADIOISOTOPES; VERTEBRATES; YEARS LIVING RADIOISOTOPES Subject Categories: 510500* -- Environment, Terrestrial -- Site Resource & Use Studies -- (-1989) 560162 -- Radionuclide Effects, Kinetics, & Toxicology -- Animals, Plants, Microorganisms, & Cells INIS Subject Categories: C5210* -- Environmental aspects of siting of nuclear installations -- Radioisotope effects, kinetics, 10/5/426 02200453 Title: & toxicology in animals, (Item 126 from file: 103) BRA-13-045740; EDB-88-143191 Terrestrial environments and ecology of Enewetak Atoll Author(s): Reese, E.S.; Helfrich, P. (eds.) Devaney, D.M.; Reese, Affiliation: Univ. of Hawaii, Honolulu (USA) Title: The natural history of Enewetak Atoll: Environments, biotas, and processes Corporate Source: Hawaii Univ. at Manoa, Scientific and Technical Information, Publication Date: 1987 p 187-202 E.S.; Burch, Volume 1, Honolulu Oak Ridge, The ecosystem: (USA) TN - B.L.; USDOE Office of Report Number(s): DOE/EV/00703-T1-Vol.1 Order Number: DE87006110 Document Type: Analytic of a Report Language: English Journal Announcement: EDB8808 Availability: NTIS, PC All/MF AOl; 1. Subfile: ERA (Energy Research Abstracts) . JMT (DOE contractor) Country of Origin: United States Country of Publication: United States Abstract: The terrestrial ecosystem of Enewetak Atoll is the result of the aa oe toe kee ee eA ee ee bee wena ame ee et ete Ce LU ~— ae TF 1 manee nha 90031! C2120 plants & microorganisms