00000nam 2200000za 4500 9.856422 CaOODSP 20241203113643 cr ||||||||||| 180510s1989 bccb ob f000 0 eng d 0662173740 0831-6481 CaOODSP eng eng fre s-cl--- CW69-5/83E-PDF CW69-5/83E Vermeer, Kees. Trace metals in the marine bird food chain downstream from the El Salvador copper mine, Chile [electronic resource] / Kees Vermeer and Juan Carlos Castilla. Delta, B.C. : Canadian Wildlife Service, Pacific and Yukon Region, 1989. 16 p. : map. Technical report series ; no. 83 Digitized edition from print [produced by Environment and Climate Change Canada]. Includes bibliographical references. "Trace metals in a marine bird food chain were investigated in the Chañaral area, downstream from the El Salvador copper mine, Chile. Beach deposits, algae and marine invertebrates showed a decreasing residue gradient for arsenic, copper, iron, lead, titanium and vanadium from the tailings discharge site on the edge of the visible tailing deposits. Cadmium was found in high levels in marine organisms at some reference sites. Observed metal levels in birds, except cadmium, were thought to be close to background levels and may reflect the presence of little contaminated prey for birds to feed upon in the tailing deposit area. Cadmium levels of some concern (40-90 ppm) were observed in Whimbrels (Numenius hudsonicus) and in sand crabs (Emerita analoga) (5-6 ppm). It is suggested that the cadmium pathway should be further investigated in the Whimbrel food chain"--Abstract, p. i. Issued also in print format. Includes abstract in French. Water birds Food chains (Ecology) Copper mines and mining Pollutants Chile Castilla, Juan Carlos. Canada. Environment Canada. Canadian Wildlife Service. Pacific and Yukon Region. Technical report series (Canadian Wildlife Service) no. 83. (CaOODSP)9.504438 PDF 769 KB https://publications.gc.ca/collections/collection_2018/eccc/cw69-5/CW69-5-83-eng.pdf