| Autor: |
Widman JC Jr; NOAA/NMFS, 212 Rogers Ave., Milford, CT 06418, USA. jwidman@mi.nmfs.gov, Meseck SL, Sennefelder G, Veilleux DJ |
| Jazyk: |
angličtina |
| Zdroj: |
Archives of environmental contamination and toxicology [Arch Environ Contam Toxicol] 2008 Apr; Vol. 54 (3), pp. 460-5. Date of Electronic Publication: 2007 Oct 12. |
| DOI: |
10.1007/s00244-007-9051-z |
| Abstrakt: |
Juvenile bay scallops (7.2-26.4 mm) were exposed for 72 h to different concentrations of un-ionized ammonia, nitrite, or nitrate. Using the Trimmed Spearman Karber method, 50% lethal concentrations (LC(50)) and 95% confidence limits were calculated individually for each. Un-ionized ammonia concentrations above 1.0 mg N-NH(3)/L resulted in 100% scallop mortality within 72 h. The 72-h LC(50) for un-ionized ammonia was calculated at 0.43 mg N/L. At nitrite concentrations of 800 mg N/L or higher 100% mortality was observed. The 72-h LC(50) for nitrite was calculated at 345 mg N/L. Nitrate was the least toxic, with 100% mortality observed at a concentration of 5000 mg N/L. The calculated nitrate 72-h LC(50) was 4453 mg N/L. Our results indicate that un-ionized ammonia is the most lethal nitrogenous waste component to bay scallops. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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