Stylodrilus heringianus
Freshwater species. (ref. ID; 7006)
[ref. ID; 2164]
Test system
Approximately 42-days gamma scan system
Strains
From offshore Benton Harbor, Michigan and Grand Haven, Michigan.
Toxicants
Lake Michigan sediments collected from offshore Benton Harbor, Michigan and Grand Haven, Michigan (Grand Haven considered less contaminated than Benton Harbor).
Test design
Six glass microcosms (5.5x3.5x30 cm), dark. Temperature 10 degrees C.
- 1. Oligochaete from Grand Haven + Sediment from Benton Harbor + [137]Cs adsorbed on illite clay particles.
- 2. Oligochaete from Grand Haven + Sediment from Grand Haven + [137]Cs adsorbed on illite clay particles.
- 3. Oligochaete from Benton Harbor + Sediment from Benton Harbor + [137]Cs adsorbed on illite clay particles.
Measurements/observations
Sediment reworking rate, mortality, dry weight.
[ref. ID; 7006]
Test system
96-hr acute lethal bioassay
Strains
Worms were sieved (0.5 mm mesh) from sediment (Lake Michigan near Waukegan, III.) collected by means of Ponar grabs or dip nets.
Toxicants
3CdSO4/8H2O, HgCl2, 2,3,4,5,6-Pentacholophenate, and black liquor.
Test design
Petri dishes (3.5 cm diameter and 1 cm depth). Loading densities <0.5 g/L. 24-hr solution replacement. 3 replicates. Dark.
Experimental condition
Temperature (1, 10, 20 degrees C), pH (6, 7, 8), salinity (0, 5 ppt).
Measurements/observations
Mortality.
Evaluations
LC50.