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Ecotoxicological information

Sediment toxicity

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Administrative data

Endpoint:
sediment toxicity: short-term
Type of information:
experimental study
Adequacy of study:
weight of evidence
Reliability:
4 (not assignable)
Rationale for reliability incl. deficiencies:
other: documentation insufficient for assessment

Data source

Reference
Reference Type:
publication
Title:
Toxicity and metabolism studies with EPA priority pollutants and related chemicals in freshwater organisms
Author:
Call DJ, Brooke LT, Ahmad N, RIchter JE
Year:
1983
Bibliographic source:
EPA 600/3-83-095, US EPA, Duluth, MN: 120 p

Materials and methods

Principles of method if other than guideline:
Ten to 20 midge larvae in their 3rd or 4th instar stage of developement were exposed in 8.5 cm glass dishes filled to a depth of 2.6 cm (ca. 200 ml volume) with test solution. Each chamber with a 3 mm glass overflow tube contained lake water plus a small amount of food (ratio of 1 l : 0.0025 l), with a fine layer of sand on the bottom.
GLP compliance:
no

Test material

Reference
Name:
Unnamed
Type:
Constituent
Details on test material:
purity 97%

Sampling and analysis

Analytical monitoring:
yes
Details on sampling:
concentrations were analysed daily

Test organisms

Test organisms (species):
other: Tanytarsus dissimilis
Details on test organisms:
Tanytarsus dissimilis Johanson 1937

Study design

Study type:
laboratory study
Test type:
other: static or flow-through
Water media type:
freshwater
Type of sediment:
not specified

Results and discussion

Effect concentrations
Duration:
48 h
Dose descriptor:
LC50
Effect conc.:
13 mg/L
Conc. based on:
test mat.
Basis for effect:
mortality
Remarks on result:
other: 10.9-15.6

Any other information on results incl. tables

The author recommends organisms such as Tanytarsus dissimilis with consistently high tolerances to a broad range of chemical classes should receive minimal effort.

Applicant's summary and conclusion