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Environmental pollutants in endangered vs. increasing subspecies of the lesser black-backed gull on the Norwegian Coast

机译:挪威海岸濒临灭绝的黑背海鸥与不断增加的亚种中的环境污染物

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摘要

Organochlorine (OC) residues were measured in eggs and blood of different subspecies of the lesser black-backed gull, Larus fuscus, on the Norwegian coast: a) increasing L. f. intermedius in the North Sea; b) endangered L. f. fuscus near the Arctic Circle; c) L. f. fuscus and greyish-mantled gulls, with a L. f intermedius appearance, in the Barents Sea region. The dominating OCs in lesser black-backed gulls were polychlorinated biphenyls (PCB) and p,p'-dichlorodiphenyldichloroethylene (DDE). DDE and beta-hexachlorocyclohexane (beta-HCH) residues were higher in L. f. fuscus compared to L. f intermedius and greyish-mantled birds in the Barents Sea region. In the latter area, blood residues of PCB and DDE in lesser black-backed gulls were as high as in great black-backed gulls, Larus marinus, while in the other regions they were lower. The higher DDE residues in endangered L. f. fuscus compared to increasing L. f intermedius and greyish-mantled birds, which are invading northern Norway, suggest that OCs may have played a role in the population decline of L. f.fuscus, possibly in combination with nutrient stress. (c) 2006 Elsevier Ltd. All rights reserved.
机译:在挪威海岸的黑背黑鸥鸥属(Larus fuscus)的不同亚种的鸡蛋和血液中测量了有机氯(OC)残留量:a)L. f。增加。北海中游b)濒临灭绝北极圈附近的c。L. f。在巴伦支海地区的红海鸥和浅灰色海鸥,中间色为L. f。较小的黑背海鸥中主要的OC是多氯联苯(PCB)和p,p'-二氯二苯基二氯乙烯(DDE)。 L. f。中的DDE和β-六氯环己烷(β-HCH)残留较高。相比于巴伦支海地区的中间inter(L。f intermedius)和浅灰色的鸟儿在后一个区域,较小的黑背海鸥中的PCB和DDE的血液残留与大型黑背海鸥Larus marinus中的一样高,而在其他区域中则较低。濒危L. f。中较高的DDE残留量。与入侵挪威北部的中间L. f。intermedius和浅灰色的鸟类相比,Fuscus表明,OCs可能对F. fuscus L. f.cus的种群下降起到了一定作用。 (c)2006 Elsevier Ltd.保留所有权利。

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