||Effects of Low Dissolved Oxygen on Survival, Growth and Reproduction of 'Daphnia, Hyalella and Gammarus'.
Nebeker, A. V. ;
Onjukka, S. T. ;
Stevens, D. G. ;
Chapman, G. A. ;
Dominguez, S. E. ;
||Corvallis Environmental Research Lab., OR. ;Oregon Dept. of Fish and Wildlife, LaGrande.;Oregon State Univ., Corvallis.
Water quality ;
Daphnia magna ;
Daphnia pulex ;
Hyalella azteca ;
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||Daphnia magna, Daphnia pulex, Hyalella azteca, and Gammarus lacustris were exposed to low dissolved oxygen concentrations in the laboratory. Acute and chronic exposures were conducted to develop data for use in the U.S. Environmental Protection Agency's (EPA's) water quality criteria document for dissolved oxygen. Daphnia magna had two 48-h LC50s (50% mortality) of 0.6 and 0.7 mg/L, a highest-adverse-effect concentration of 0.6, and a lowest-no-adverse-effect concentration of 0.9 mg/L O2 (based on reproduction). Daphnia pulex had a 48-h LC50 of 0.5, two 96-h LC50s of 0.4 and 0.7, a highest-adverse-effect concentration of 1.6, and a lowest-no-adverse-effect concentration of 2.1 mg/L O2 (based on reproduction). Hyallela azteca had 96-h and 30-d LC50s of < 0.3 mg/L, a highest-adverse-effect concentration of 1.2, and a lowest-no-adverse-effect concentration of > 1.2 (based on reproduction). Gammarus lacustris had two 7-d LC50s of < 0.2 mg/L, a highest-adverse-effect concentration of < 0.2, and a lowest-no-adverse-effect concentration of 0.1 mg/L O2 (based on survival). Lack of access to the water surface increased mortality. Nitrogen-stripped and vacuum-degassed test water produced the same mortality. Results of the study indicate that dissolved oxygen concentrations adequate to avoid impairment of fish production, as outlined in the EPA's water quality criteria document, should provide reasonable protection for these four species.
||Pub. in Environmental Toxicology and Chemistry, v11 p373-379 1992. See also PB92-188846. Prepared in cooperation with Oregon Dept. of Fish and Wildlife, LaGrande. Sponsored by Oregon State Univ., Corvallis.
|NTIS Title Notes
||Reprint: Effects of Low Dissolved Oxygen on Survival, Growth and Reproduction of 'Daphnia, Hyalella and Gammarus'.
||PC A02/MF A01