| Main Title |
Effects of Chronic Radiation on Reproductive Success of the Polychaete Worm Neanthes Arenaceodentata. |
| Author |
Harrison, F. L. ;
Anderson, S. L. ;
|
| CORP Author |
Lawrence Livermore National Lab., CA.;Department of Energy, Washington, DC. |
| Publisher |
Dec 88 |
| Year Published |
1988 |
| Report Number |
UCRL-15988 ;EPA/520/1-88-004; W-7405-ENG-48; |
| Stock Number |
DE89006053 |
| Additional Subjects |
Life Span ;
Low-Level Radioactive Wastes ;
Mortality ;
Annelids ;
Biological Effects ;
Cobalt 60 ;
Embryos ;
Evaluation ;
Juveniles ;
Marine Disposal ;
Modifications ;
Mutations ;
Radiation Doses ;
Reproduction ;
Statistical Data ;
ERDA/560152 ;
ERDA/052002 ;
Biological radiation effects ;
Neanthes arenaceodentata ;
Invertebrates ;
Teratogenesis
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| NTIS |
DE89006053 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
57p |
| Abstract |
The effects of lifetime exposure to chronic irradiation on reproductive success were assessed for laboratory populations of the polychaete worm Neanthes arenaceodentata. Lifetime exposure was initiated upon the spawning of the P sub 1 female and was terminated upon spawning of the F sub 1 female. Groups of experimental worms received either no radiation (controls) or 0.19, 2.1, or 17 mGy/h. The total dose received by the worms was either background or approximately 0.55, 6.5, or 54 Gy, respectively. The broods from the F sub 1 mated pairs were sacrificed before hatching occurred, and information was obtained on brood size, on the number of normal and abnormal embryos, and on the number of embryos that were living, dying, and dead. The mean number of embryos in the broods from the F sub 1 females exposed to lifetime radiation of 0.19 and 2.1 mGy/h was not significantly different from the mean number of embryos from control females; however, the mean number of embryos was different from those F sub 1 females exposed to 17 mGy/h. There was a significant reduction in the number of live embryos in the broods from the F sub 1 mated pairs that were exposed to the lowest dose rate given, 0.19 mGy/h, as well as those exposed to 2.1 and 17 mGy/h. Also, increased percentages of abnormal embryos were determined in the broods of all the radiation-exposed groups. 39 refs., 10 figs., 15 tabs. (ERA citation 14:013652) |
| Availability Notes |
Portions of this document are illegible in microfiche products. |
| Category Codes |
57V; 97R; 97Q; 68F; 77G |
| NTIS Prices |
PC A04/MF A01 |
| Document Type |
NT |
| Cataloging Source |
NTIS/MT |
| Control Number |
913113259 |
| Origin |
NTIS |
| Type |
CAT |
