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Environmental fate & pathways

Bioaccumulation: aquatic / sediment

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Administrative data

Endpoint:
bioaccumulation: aquatic / sediment
Type of information:
migrated information: read-across based on grouping of substances (category approach)
Adequacy of study:
weight of evidence
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Study not according to standard protocol but good quality and considered useful for assessing food chain transfer of zinc. Culture medium, test water conditions well described and relevant.

Data source

Reference
Reference Type:
publication
Title:
Food chain analysis of exposures and risks to wildlife at a metal contaminated wetland
Author:
Pascoe GA, Blanchet RJ and Linder G
Year:
1996
Bibliographic source:
Arch. Environ. Contam. and Toxicol. 30,306-318

Materials and methods

Test guideline
Qualifier:
no guideline followed
Principles of method if other than guideline:
food chain analysis in a contaminated natural environment
GLP compliance:
not specified

Test material

Reference
Name:
Unnamed
Type:
Constituent
Details on test material:
data referred to as "zinc" in general, no speciation given.

Sampling and analysis

Details on sampling:
Sample collection for the food chain analysis was performed over different field seasons at a 450 acre portion of wetland, located in the Milltown reservoir sediment superfund site , Montana, (Rocky Mountains), USA. sampling was done according to USEPA and ASTM guidelines.

Test solutions

Vehicle:
no

Test organisms

Test organisms (species):
other: various wildlife species
Details on test organisms:
Various species of aquatic and terrestrial invertebrates, minnows, fish, small mammals and vegetation were included in the analysis.

Study design

Route of exposure:
other: feed and aqueous
Test type:
field study
Water / sediment media type:
natural sediment: freshwater

Test conditions

Test temperature:
ambient
Details on test conditions:
ambient conditions (field study)
Nominal and measured concentrations:
concentrations in control environment were (in mg Zn/kg): sediment: 52, soil: 49
concentrations in contaminated environment were (in mg Zn/kg): sediment: 1426, soil:1950
concentration in water was (µg Zn/l) 5 (control) and 149 (contaminated)
Reference substance (positive control):
no

Results and discussion

Bioaccumulation factoropen allclose all
Type:
BAF
Value:
4 060
Basis:
whole body d.w.
Calculation basis:
steady state
Remarks on result:
other: aquatic invertebrates: control water
Remarks:
Conc.in environment / dose:5
Type:
BAF
Value:
3 483
Basis:
whole body w.w.
Calculation basis:
steady state
Remarks on result:
other: aquatic invertebrates, contaminated water
Remarks:
Conc.in environment / dose:149
Type:
BAF
Value:
2 600
Basis:
whole body d.w.
Calculation basis:
steady state
Remarks on result:
other: snails, control water
Remarks:
Conc.in environment / dose:5
Type:
BAF
Value:
779
Basis:
whole body d.w.
Calculation basis:
steady state
Remarks on result:
other: snails, contaminated water
Remarks:
Conc.in environment / dose:149
Type:
BAF
Value:
177
Basis:
whole body w.w.
Calculation basis:
steady state
Remarks on result:
other: fish, contaminated water
Remarks:
Conc.in environment / dose:149
Details on results:
concentrations in biota were considered steady state (field study). BAF are compared between control conditions and contaminated conditions.
Reported statistics:
all values were reported with standard deviations

Applicant's summary and conclusion

Validity criteria fulfilled:
yes
Conclusions:
Field study of good quality and considered useful for assessing the effect on the endpoint
Executive summary:

Food chain transfer was studies in several species of wildlife, and results observed between a control area and a contaminated area were compared. In all biota studies, being aquatic or terrestrial, BAFs were lower in biota exposed to elevated zinc, as compared to the controls.