Mercury levels in seabirds from the Azores, mid-north Atlantic ocean. Monteiro, L., R., Furness, R., W., & del Nevo, A., J. Archives of Environmental Contamination and Toxicology, 28:304-309, 1995.
abstract   bibtex   
Levels of total mercury were detrmined in body feathers of 257 seabirds belonging to 7 species from the Azore archipelago, mid-north Atlantic ocean. Hg levels in adult birds showed highly significant inter-specific variations. Median levels were higher in small petrels (Madeiran storm petrel = 12.5 ppm; Buwler's petrel = 22.1 ppm) than in shearwaters (little shearwater = 2.1 ppm; Cory's shearwater 6 pp) and terns (Roseate tern 2.0 ppm; common tern 2.3 ppm). Such inter specific variability is discussed in relation to biological factors that may influence Hg dynamics in birds. Intra-specific variations in Hg levels were also found. Hg levels were significnatly lower in chicks than in adult of Cory's shearwater, roseate tern and common tern. The levels in chicks feathers were 60-70 % of those in adult feathers. In Cory's shearwater and the terns (roseate and common combined), Hg levels decreased significantly with increasing age of chicks. Hg levels in adults Madeiran storm petrel showed pronounced seasonal variation, being about 50 % lower in spring breeders compared to automn breeders. Hg levels are compared with levels reported for seabirds populations of the same or related species, from a variety of regions. The use of birds feathers to monitor Hg in the marine environment is briefly discussed.
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 title = {Mercury levels in seabirds from the Azores, mid-north Atlantic ocean},
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 abstract = {Levels of total mercury were detrmined in body feathers of 257 seabirds belonging to 7 species from the Azore archipelago, mid-north Atlantic ocean. Hg levels in adult birds showed highly significant inter-specific variations. Median levels were higher in small petrels (Madeiran storm petrel = 12.5 ppm; Buwler's petrel = 22.1 ppm) than in shearwaters (little shearwater = 2.1 ppm; Cory's shearwater 6 pp) and terns (Roseate tern 2.0 ppm; common tern 2.3 ppm). Such inter specific variability is discussed in relation to biological factors that may influence Hg dynamics in birds. Intra-specific variations in Hg levels were also found. Hg levels were significnatly lower in chicks than in adult of Cory's shearwater, roseate tern and common tern. The levels in chicks feathers were 60-70 % of those in adult feathers. In Cory's shearwater and the terns (roseate and common combined), Hg levels decreased significantly with increasing age of chicks. Hg levels in adults Madeiran storm petrel showed pronounced seasonal variation, being about 50 % lower in spring breeders compared to automn breeders. Hg levels are compared with levels reported for seabirds populations of the same or related species, from a variety of regions. The use of birds feathers to monitor Hg in the marine environment is briefly discussed.},
 bibtype = {article},
 author = {Monteiro, L R and Furness, R W and del Nevo, A J},
 journal = {Archives of Environmental Contamination and Toxicology},
 keywords = {E0225,GBMS}
}

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