Effects of acephate (OrtheneR) on development and survival of the salamander, Ambystoma gracile (Baird)
Titel:
Effects of acephate (OrtheneR) on development and survival of the salamander, Ambystoma gracile (Baird)
Auteur:
Geen, G. H. McKeown, B. A. Watson, T. A. Parker, D. B.
Verschenen in:
Journal of environmental science and health. Part B, Pesticides, food contaminants, and agricultural wastes
Paginering:
Jaargang 19 (1984) nr. 2 pagina's 157-170
Jaar:
1984
Inhoud:
The effects of acephate, a water-soluble organophosphorus insecticide, on the early growth and survival of the salamander, Ambystoma gracile, were examined. The 96-h LC50 for 69-day old larvae was 8816 mg/L. Exposure of egg masses to concentrations up to 798 mg/L did not produce significant differences in mortality up to the time of hatching. Larval mortality in the first 7 days after hatching increased at the higher acephate concentrations but declined in the period day 7-29 to low rates independent of acephate concentration. Growth rate decreased and morphological abnormalities increased in larvae exposed to 382 and 798 mg/L acephate. This component of lake fauna would be little affected by insect control programs which use acephate since maximum surface water concentrations would probably be < 1 mg/L.