Supplemental Data for Chronic Sensitivity of White Sturgeon (Acipenser transmontanus) and Rainbow Trout (Oncorhynchus mykiss) to Cadmium, Copper, Lead, or Zinc in Laboratory Water-Only Exposures Ning Wang *†, Christopher G. Ingersoll†, Rebecca A. Dorman†, William G. Brumbaugh†, Christopher A. Mebane‡ James L. Kunz†, and Doug K. Hardesty† †U.S. Geological Survey, Columbia Environmental Research Center, Columbia, Missouri ‡U.S. Geological Survey, Boise, Idaho Table S1. Summary conditions for conducting chronic water-only toxicity tests with White Sturgeon (Acipenser transmontanus) and Rainbow Trout (Oncorhynchus mykiss) following standard test methods recommended by the American Society for Testing and Materials (2013a,b), the U.S. Environmental Protection Agency (2002), and U.S. Gelogical Survey Columbia Environmental Reserach Center Quality Assurance Project Plan (2010) Parameter Conditions Chemicals Cadmium chloride, copper sulfate, lead nitrate, zinc chloride Test type Flow-through, water-only exposures in intermittent-flow proportional diluters Temperature Sturgeon: 15°C; trout: 12°C Light Ambient laboratory light; 16 h light/8 h dark Test chamber size 9.5 L (20 pieces of smooth stones were placed in the chamber up to swimup life stage during exposure started with newly hatched sturgeon) Test solution 7L volume Water addition 0.25 L/chamber/15 to 30 min (about 2 to 4 volume additions/d) a Organisms/chamber C1 and CC: 20 fish (thinned to 10 on test day 25 in sturgeon CC exposure and on test day 21 in trout CC exposure); C2: 10 fish; C1-R: 30 fish Loading <0.5 g fish wet weight/L of solution passing through the chamber in 24 h and <5 g fish wet weight/L in the chamber at any given time Replicates Duration Age of test organisms Feeding Chamber cleaning Test water Dilution series (nominal concentrations) 4 Sturgeon: C1: 25 d; C2: 28 d; CC: 53 d; C1-R: 24 d Trout: C1: 21 d; C2: 28 d; CC: 52 d Sturgeon: C1: 2 dph; C2: 27 dph; CC: 2 dph; Rep-C1: 1 dph Trout: C1: 1 dph; C2: 26 dph; CC: 1 dph Fed brine shrimp nauplii or live aquatic oligochaetes 2 to 3 times daily in excess (see text for details on timing and amount of food provided throughout the exposures) Fish faeces and remaining food siphoned once daily in the morning Well water diluted with deionized water (see text for details on water quality characteristics) Sturgeon: Cadmium: 0, 0.75, 1.5, 3.0, 6.0, 12 µg/L Copper: 0, 0.50, 1.0, 2.0, 4.0, 8.0 µg/L Lead: 0, 5.0, 10, 20, 40, 80 µg/L Zinc: 0, 25, 50, 100, 200, 400 µg/L Trout: Cadmium: 0, 0.75, 1.5, 3.0, 6.0, 12 µg/L Copper: 0, 10, 20, 40, 80, 160 µg/L Lead: 0, 10, 20, 40, 80, 160 µg/L Zinc: 0, 50, 100, 200, 400, 800 µg/L Aeration None, except the last week of the sturgeon CC and C2 exposures when dissolved oxygen decreased to about 5 mg/L Endpoints Survival, immobilization, and lack of hiding (newly hatched sturgeon), total length, dry weight, and biomass Test acceptability C1 and C2: ≥80% control survival criteria CC: ≥64% control survival a C1=chronic life stage 1 exposure, C2=chronic life stage 2 exposure, CC=chronic continuous exposure, C1-R=repeat C1 exposure. References: American Society for Testing and Materials, 2013a. Standard guide for performing early lifesage toxicity tests with fishes, E1241-05. In Annual Book of ASTM Standards, Vol. 11.06, ASTM International, West Conshohocken, PA, USA. American Society for Testing and Materials, 2013b. Standard guide for measurement of behavior during fish toxicity tests, E1711-95 (2008). In Annual Book of ASTM Standards, Vol. 11.06, ASTM International, West Conshohocken, PA, USA. U.S. Environmental Protection Agency, 2002. Short-term methods for estimating the chronic toxicity of effluents and receiving water to freshwater organisms. EPA/821/R-02/013 (5th ed.), Washington, DC. U.S. Geological Survey, 2010. USGS-Columbia Quality Assurance Project Plan for an evaluation of the acute or chronic toxicity of individual chemicals of interest to White Sturgeon (Acipenser transmontanus) and Rainbow Trout (Oncorhynchus mykiss) in water-only exposures. U.S. Geological Survey, Columbia Environmental Research Center, Columbia, Missouri. Figure S1. Examples of hiding behavior and immobilization of White Sturgeon (Acipenser transmontanus) on test day 8 in the 53-d exposure started with 2-d-post-hatch larvae: fish actively hiding in a control replicate chamber (A), lack of hiding in the high concentration of zinc (369 µg Zn/L, B), and immobilization in the high concentration of copper (6.91 µgCu/L, C).