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influenza in migratory birds and evidence of limited intercontinental virus exchange.migratory waterfowl of the world are the natural reservoirs of influenza viruses of all known subtypes. however, it is unknown whether these waterfowl perpetuate highly pathogenic (hp) h5 and h7 avian influenza viruses. here we report influenza virus surveillance from 2001 to 2006 in wild ducks in alberta, canada, and in shorebirds and gulls at delaware bay (new jersey), united states, and examine the frequency of exchange of influenza viruses between the eurasian and american virus clades, or s ...200717997603
metal and sediment ingestion by dabbling ducks.the chemical analysis of intestinal digesta from hunter-killed carcasses or of wildlife scat is a promising means of estimating the exposure of wildlife to those environmental contaminants that, like lead, are poorly absorbed in the digestive tract. when evaluating contaminants at a site, biologists may find the results of this non-destructive approach more straightforward to interpret in terms of exposure to wildlife than would be analyses of soils, sediments, water, or wildlife tissues. to ill ...199910472136
organochlorine and heavy metal residues in black duck eggs from the atlantic flyway, 1978.black duck (anas rubripes) eggs were collected during 1978 in the atlantic flyway. one egg from each of 49 clutches was analyzed for organochlorine compounds and mercury. dde was detected in 39 eggs, ranging from 0.09 ppm to 3.4 ppm, wet weight. dde residues were highest in eggs from delaware, where the mean dde level was 2.0 ppm. ddt and tde were present at low levels in only five and four eggs, respectively. pcbs resembling aroclor 1260 were detected in 24 eggs and ranged from 0.43 ppm to 2.9 ...19807232104
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