00000nam 2200000zi 4500 9.955850 CaOODSP 20250926155246 m o d f cr bn||||||||| 250926e199603##abcdb ob f000 0 eng d 0662247981 (print) CaOODSP eng rda CaOODSP n-cn-ab n-cn-bc R71-49/3-135E-PDF R71-49/3-135E Dobson, Evan Peter, 1966- author. Ecotoxicology of suspended and bottom sediments : Athabasca, Smoky and Peace Rivers, June 1995 / prepared for the Northern River Basins Study under project 2326-E1 by Evan Dobson, Kristin Day and T.B. Reynoldson. Edmonton, Alberta : Northern River Basins Study, March 1996. ©1996 1 online resource (64 pages in various pagings) : charts, map. text txt rdacontent computer c rdamedia online resource cr rdacarrier Northern River Basins Study project report, 1192-3571 ; no. 135 Digitized edition from print [produced by Environment and Climate Change Canada]. Includes bibliographical references (pages 12-13). "In June 1995, samples of whole sediment (five replicates per site) and suspended sediment (one sample per site) were collected from various locations in the Athabasca, Smoky and Peace Rivers, Alberta. Four species of benthic invertebrates, the chironomid Chironomus riparius, the amphipod Hyalella azteca, the mayfly Hexagenia spp. and the oligochaete worm Tubi/ex tubifex were exposed to these samples in 10 to 28 day chronic toxicity tests. The endpoints measured were survival and growth of C. riparius, H. azteca, and Hexagenia spp. and survival and reproduction of T. tubifex. With the exception of the chironomid, some or all of the other species had reduced survival, growth and/or reproductive output when exposed to whole sediments collected from sites AR1, AR5, AR8 and AR 9 in the Athabasca River. These effects were attributed to either the presence of elevated levels of metals (Cu and Ni) at some of the sites and/or the high sand content. Levels of Cu and Ni were slightly above the Lowest Effects Level (LEL) for sediments in Ontario established as a guideline for toxicity to benthic invertebrates"--Report summary. Issued also in print format. River sediments Toxicology Alberta Athabasca River. River sediments Toxicology Alberta Smoky River. River sediments Toxicology Peace River (B.C. and Alta.) Aquatic invertebrates Effect of sediments on Alberta Athabasca River. Aquatic invertebrates Effect of sediments on Alberta Smoky River. Aquatic invertebrates Effect of sediments on Peace River (B.C. and Alta.) Sédiments fluviaux Toxicologie Alberta Athabasca, Rivière. Sédiments fluviaux Toxicologie Alberta Smoky, Rivière. Sédiments fluviaux Toxicologie Paix, Rivière de la (C.-B. et Alb.) Invertébrés aquatiques Effets des sédiments sur Alberta Athabasca, Rivière. Invertébrés aquatiques Effets des sédiments sur Alberta Smoky, Rivière. Invertébrés aquatiques Effets des sédiments sur Paix, Rivière de la (C.-B. et Alb.) Northern River Basins Study (Canada)‏, issuing body. Ecotoxicology of suspended and bottom sediments : (CaOODSP)9.613152 Northern River Basins Study project report ; no. 135. (CaOODSP)9.883506 PDF 3128 KB https://publications.gc.ca/collections/collection_2025/eccc/r71/R71-49-3-135-eng.pdf