Barium bis(dihydrogenorthophosphate)

Bioaccumulation: aquatic / sediment

Administrative data

Endpoint:

bioaccumulation in aquatic species: fish

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: Acceptable well documented publication

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 R.J., Hassler T.J.

Year:

1992

Bibliographic source:

Archives of Environmental Contamination and Toxicology 22, 88-98

Materials and methods

Principles of method if other than guideline:

Trace elements in bluegill tissue (carcass and gonad) and river water (Merced river and Salt Slough, California, USA) were determined.

GLP compliance:

not specified

Test material

Test material information

Constituent 1

Reference substance name:

Barium

EC Number:

231-149-1

EC Name:

Barium

Cas Number:

7440-39-3

Molecular formula:

Ba

IUPAC Name:

barium

Details on test material:

- Name of test material (as cited in study report): Barium (the publication does not state which salt of barium was used)

Test organisms

Test organisms (species):

Lepomis macrochirus

Details on test organisms:

TEST ORGANISM
- Common name: Blugill
- Source: Merced river at George J. Hatfield State Recreation Area and from the Salt Slough at the San Luis National Wildlife Refuge, California, USA
- Length at study initiation (lenght definition, mean, range and SD): 50-186 mm (150 specimen; Merced River); 36-179 mm (90 specimen, Salt Slough)

Study design

Route of exposure:

aqueous

Test type:

not specified

Water / sediment media type:

natural water: freshwater

Test conditions

Hardness:

Merced river: 45.6-79.6 mg CaCO3/L
Salt Slough: 347.0-535.3 mg CaCO3/L

Test temperature:

Merced river: 17.3 - 24.1 °C
Salt Slough: 15.2 - 24.0°C

pH:

Merced River: 7.25-7.57
Salt Slough: 7.58-7.92

Dissolved oxygen:

Merced River: 7.9 - 8.5 mg/L
Salt Slough: 6.5 - 8.0 mg/L

Nominal and measured concentrations:

Merced river: flitered: 0.034 µg/mL
Merced river: unfiltered: 0.043 µg/mL
Salt Slough: filtered: 0.065 µg/mL
Salt Slough: unfiltered: 0.101 µg/mL

Reference substance (positive control):

no

Results and discussion

Bioaccumulation factor

Bioaccumulation factor 1

Type:

BCF

Value:

74.4

Basis:

other: tissue wet weight (carcass)

Remarks on result:

other: Male, Merced River

Remarks:

Conc.in environment / dose:0.043 µg/mL

Bioaccumulation factor 2

Type:

BCF

Value:

68.4

Basis:

other: tissue wet weight (carcass)

Remarks on result:

other: Female, Merced River

Remarks:

Conc.in environment / dose:0.043 µg/mL

Bioaccumulation factor 3

Type:

BCF

Value:

6.4

Basis:

other: tissue wet weight (gonad)

Remarks on result:

other: Female, Merced River

Remarks:

Conc.in environment / dose:0.043 µg/mL

Bioaccumulation factor 4

Type:

BCF

Value:

22.8

Basis:

other: tissue wet weight (carcass)

Remarks on result:

other: Female, Salt Slough

Remarks:

Conc.in environment / dose:0.101 µg/mL

Bioaccumulation factor 5

Type:

BCF

Value:

20.2

Basis:

other: tissue wet weight (carcass)

Remarks on result:

other: Male, Salt Slough

Remarks:

Conc.in environment / dose:0.101 µg/mL

Bioaccumulation factor 6

Type:

BCF

Value:

1.2

Basis:

other: tissue wet weight (gonad)

Remarks on result:

other: Female, Salt Slough

Remarks:

Conc.in environment / dose:0.101

Reported statistics:

Concentrations of trace elements in tissues were log transformed. Analysis of variance, t-tests, and Spearman's Rank Correlation tests were used to determine significant differences at P ≤ 0.05 unless otherwise noted. When F values indicated significant differences, Bonferroni's Multiple Pairwise comparison tests (Netter and Waserman 1974) were used to compare the geometric means for significant differences. Untransformed data were used for Spearman's Rank Correlation tests.

Any other information on results incl. tables

Barium concentration in composite bluegill tissue samples (µg/g dw). Number of composite samples in parentheses.

Sample site	Barium concentration [µg/g dw]
	Male		Female
	Carcass (4)	Gonad (4)	Carcass (6)	Gonad (6)
Merced River	12.9 (9.4 – 16.1)	n.d.	11.9 (6.5 – 17.2)	0.8 (0.6 – 1.5)
Salt Slough	8.2 (6.3 – 13.6)	n.d.	7.0 (5.7 – 9.4)	0.4 (0.2 – 0.7)