| mercury trends in herring gull (larus argentatus) eggs from atlantic canada, 1972-2008: temporal change or dietary shift? | mercury (hg) is a pervasive contaminant that can adversely affect predatory wildlife. bird eggs provide insights into breeding females' hg burdens, and are easily collected and archived. we present data on hg trends in herring gull (larus argentatus) eggs from five sites in atlantic canada from 1972 to 2008. we found a significant decrease in hg at manawagonish island, new brunswick and île du corossol, quebec, but after correcting hg for dietary shifts using stable isotopes (δ(15)n), these tren ... | 2013 | 23063997 |