||Food habits and radionuclide tissue concentrations of Nevada desert bighorn sheep 1972-1973 /
Brown, K. W. ;
Smith, D. D. ;
Bernhardt, D. E. ;
Giles, K. R. ;
Helvie., J. B.
||Environmental Protection Agency, Las Vegas, Nev.;Energy Research and Development Administration.
|| The Division,
Bighorn sheep--Nutritional aspects. ;
Radioactive tracers in animal nutrition.
Bone tissues ;
Potassium 40 ;
Strontium 90 ;
Radiation doses ;
Radiation monitoring ;
Radioecological concentration ;
Tissue distribution ;
Food habits ;
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||26 unnumbered pages : illustrations, charts, tables ; 28 cm
||The botanical composition of the diet and radionuclide content of selected tissues of desert bighorn sheep (Ovis canadensis nelsoni) collected during the 1972 and 1973 hunting seasons were determined by analyzing rumen contents, and lung, liver, kidney, and bone tissues. Botanical examination of the rumen contents showed that grass exceeded 50 percent of the diet of 10 to 14 animals collected in 1972 and 12 of 18 animals collected in 1973. Desert needlegrass (Stipa speciosa), Indian rice grass (Oryzopsis hymenoides), and squirrel tail (Sitanion hystrix) were the major grasses utilized. The dominant shrub species consumed included the joint firs (Ephedra viridis) and (Ephedra nevadensis), Mohave yucca (Yucca schidigera), and cliff rose (Cowania mexicana). With the exception of potassium-40, gamma-emitting radionuclides were not detected in desert bighorn sheep tissue. The tritium levels reported were within environmental levels. Strontium-90 levels averaged 4.9 and 4.1 pCi/gram of bone ash for 1972 and 1973, respectively, continuing the downward trend observed in recent years. Uranium levels were similar to those reported from cattle grazing the same general geographic areas. The daily consumption for one year of 500 grams of liver containing the highest levels of plutonium and uranium would result in a dose to the human bone, the tissue expected to receive the highest dose, of approximately 1 mrem/year. This is less than 1% of the radiation protection guides for the general population. (ERA citation 01:026649)
||This study performed under a Memorandum of Understanding No. AT(26-1)--539 for the U.S. Energy Research and Development Administration. "Literature cited: " p. 13-15 "EMSL-LV-539-6." "June 1976." Cover title.
||Las Vegas, NV
|Corporate Au Added Ent
||United States. Energy Research and Development Administration.; United States. Environmental Protection Agency.; United States. Environmental Protection Agency. Monitoring Systems Research and Development Division.; Environmental Monitoring and Support Laboratory (Las Vegas, Nev.)
|PUB Date Free Form
||PC A03/MF A01
|OCLC Time Stamp
|OCLC Rec Leader
||01740cam 2200409Ia 45010