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EC number: 233-131-9 | CAS number: 10042-76-9
Bioaccumulation: aquatic / sediment
Administrative data
- Endpoint:
- bioaccumulation in aquatic species: fish
- Type of information:
- experimental study
- Adequacy of study:
- weight of evidence
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: No guidance study. Sr-levels were measured in field-collected fish at different locations. Relevant study for natural field conditions
Data source
Reference
- Reference Type:
- publication
- Title:
- Selenium and other trace elements in bluegills from agricultural return flows in the San Joaquin Valley, California
- Author:
- Nakamoto RJ, Hassler TJ
- Year:
- 1 992
- Bibliographic source:
- Arch.Environ.Contam.Toxicol. 22, 88-98
Materials and methods
Test guideline
- Qualifier:
- no guideline followed
- Principles of method if other than guideline:
- Trace elements, including Sr, were determined in water samples and bluegills (whole body ) taken from tributaries of the San Joaquin River
- GLP compliance:
- not specified
Test material
- Reference substance name:
- Strontium
- EC Number:
- 231-133-4
- EC Name:
- Strontium
- Cas Number:
- 7440-24-6
- Molecular formula:
- Sr
- IUPAC Name:
- strontium
- Test material form:
- not specified
Constituent 1
Sampling and analysis
- Details on sampling:
- Composite samples of filtered and unfiltered water from the Channel were collected, acidified in the field and frozen/refrigerated. .
Bluegills were collected from the Merced River and from the Salt Slough with a gas-powered electrofisher. Ten composite carcass and 10 composite gonad samples each from the Merced River and the Salt Slough were analysed. Each composite sample consisted of carcass or gonad samples either from 2 female bluegills or 3 male bluegills.
Test organisms
- Test organisms (species):
- Lepomis macrochirus
Study design
- Route of exposure:
- aqueous
- Test type:
- field study
- Water / sediment media type:
- natural water: freshwater
Test conditions
- Hardness:
- Merced river: 45.6-79.6 mg/L as CaCO3 (mean: 60.1 mag/L as CaCO3)
Salt Slough: 347.0-535.3 mg/L as CaCO3 (mean: 422.7 mg/L as CaCO3) - Test temperature:
- field temperature at time of collection: 15.2-24.1 degrees Celcius.
- pH:
- Merced River: 7.25-7.57 (mean: 7.40)
Salt Slough: 7.58-7.92 (mean: 7.72) - Nominal and measured concentrations:
- Merced river: flitered: 0.138 µg/mL
Merced river: unfiltered: 0.138 µg/mL
Salt Slough: filtered: 1.106 µg/mL
Salt Slough: unfiltered: 1.143 µg/mL
Results and discussion
Bioaccumulation factoropen allclose all
- Type:
- BCF
- Value:
- 342.7 L/kg
- Basis:
- organ w.w.
- Remarks:
- carcass
- Remarks on result:
- other: female bluegill in River Merced (range: 265.9-466.3)
- Remarks:
- Conc.in environment / dose:0.138 mg/L
- Type:
- BCF
- Value:
- 11.9 L/kg
- Basis:
- organ w.w.
- Remarks:
- gonad
- Remarks on result:
- other: female bluegill in River Merced (range: 7.0-26.5)
- Remarks:
- Conc.in environment / dose:0.138 mg/L
- Type:
- BCF
- Value:
- 92 L/kg
- Basis:
- organ w.w.
- Remarks:
- carcass
- Remarks on result:
- other: male bluegill in River Merced
- Remarks:
- Conc.in environment / dose:0.138 mg/L
- Type:
- BCF
- Value:
- 7.5 L/kg
- Basis:
- organ w.w.
- Remarks:
- gonad
- Remarks on result:
- other: male bluegill in River Merced (range: 1.9-12.6)
- Remarks:
- Conc.in environment / dose:0.138 mg/L
- Type:
- BCF
- Value:
- 60.6 L/kg
- Basis:
- organ w.w.
- Remarks:
- carcass
- Remarks on result:
- other: female bluegill in Salt Slough (range: 39.2-78.1)
- Remarks:
- Conc.in environment / dose:1.106 mg/L
- Type:
- BCF
- Value:
- 1.5 L/kg
- Basis:
- organ w.w.
- Remarks:
- gonad
- Remarks on result:
- other: female bluegill in Salt Slough (range: 0.9-2.5)
- Remarks:
- Conc.in environment / dose:1.106 mg/L
- Type:
- BCF
- Value:
- 40.3 L/kg
- Basis:
- organ w.w.
- Remarks:
- carcass
- Remarks on result:
- other: male bluegill in Salt Slough (range: 35.6-42.9)
- Remarks:
- Conc.in environment / dose:1.106 mg/L
- Type:
- BCF
- Value:
- 1.4 L/kg
- Basis:
- organ w.w.
- Remarks:
- gonad
- Remarks on result:
- other: male bluegill in Salt Slough (range: 1.0-2.1)
- Remarks:
- Conc.in environment / dose:1.106 mg/L
- Reported statistics:
- Analysis of variance, t-tests, and Spearman's rank correlation tests wee used to determine significant differences at p<= 0.05.
Applicant's summary and conclusion
- Conclusions:
- Reported bioconcentration values can be used in a weight of evidence approach for the evaluation of Sr bioaccumulation in the aquatic environment
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