The effects of chronic radiation on reproductive success of the polychaete worm Neanthes arenaceodentata

Technical Report · Thu Dec 01 04:00:00 EST 1988

DOI:https://doi.org/10.2172/6608677· OSTI ID:6608677

Harrison, F L; Anderson, S L

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 P1 female and was terminated upon spawning of the F1 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 F1 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 F1 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 F1 females exposed to 17 mGy/h. There was a significant reduction in the number of live embryos in the broods from the F1 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.

• Research Organization: Lawrence Livermore National Lab., CA (USA)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6608677
• Report Number(s): UCRL-15988; EPA/520/1-88-004; ON: DE89006053
• Country of Publication: United States
• Language: English

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ANNELIDS
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INVERTEBRATES
ISOMERIC TRANSITION ISOTOPES
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JUVENILES
LIFE SPAN
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MANAGEMENT
MARINE DISPOSAL
MATERIALS
MINUTES LIVING RADIOISOTOPES
MODIFICATIONS
MORTALITY
MUTATIONS
NUCLEI
NUMERICAL DATA
ODD-ODD NUCLEI
RADIATION DOSES
RADIOACTIVE MATERIALS
RADIOACTIVE WASTES
RADIOISOTOPES
REPRODUCTION
STATISTICAL DATA
WASTE DISPOSAL
WASTE MANAGEMENT
WASTES
YEARS LIVING RADIOISOTOPES