US EPA

2204883 

Technical Report 

Toxicities of eight organochlorine compounds in sediment and seawater to Crangon septemspinosa 

Mcleese, DW; Metcalfe, CD 

1980 

Yes 

Bulletin of Environmental Contamination and Toxicology
ISSN: 0007-4861
EISSN: 1432-0800 

Springer-Verlag 

PESTAB/81/3473 

Environ 

6 

921-928 

English 

10.1007/BF01985632 

PESTAB. Lethality of organochlorines in water was determined in static tests using 3 Crangon (2.0 g each) in 2 l of seawater. After 48-hr exposure, the animals were transferred to new beakers with freshly prepared solutions; tests were terminated at 96 hr. Chlordane, endrin, Aroclor 1242, and DDT were tested at 10 and 20?C. Endosulfan, dieldrin, Aroclor 1254, and HCB were tested at 20?C. Seven of the 8 compounds were extremely toxic, with 96-hr LC50s ranging from ? 0.2-13 mug/l. In tests with sediment, there were no mortalities with HCB, Aroclor 1242, and Aroclor 1254 at the maximum concentrations tested. There appeared to be close agreement between LT50s for Crangon at the average concentrations measured in the surficial water and the LT50s from tests without sediment but with similar concentrations in the water. These results suggest that the compounds adsorbed to sediment contribute little towards the toxicity.