Contamination status and accumulation characteristics of heavy metals andarsenic in five seabird species from the central Bering Sea

The Journal of Veterinary Medical Science

Masaaki FUKUWAKA¹  Mayumi ISHIZUKA²  Yoshinori IKENAKA³  Yared Beyene YOHANNES³  Chihiro ISHII³  Yutaka WATANUKI³  Hazuki MIZUKAWA³  Shouta M.M. NAKAYAMA⁴ 

[1] Department of Chemistry, College of Natural andComputational Science, University of Gondar, P.O. Box 196, Gondar,Ethiopia;Faculty of Fisheries Sciences, Hokkaido University,3-1-1 Minato-cho, Hakodate 041-8611, Japan;Graduate School of Veterinary Medicine, HokkaidoUniversity, Kita 18, Nishi 9, Kita-ku, Sapporo 060-0818, Japan;Water Research Group, Unit for Environmental Sciencesand Management, North-West University, Potchefstroom, South Africa

关键词: Bering Sea;    cadmium;    mercury;    seabird;   

DOI  :  10.1292/jvms.16-0441

学科分类：兽医学

来源: Japanese Society of Veterinary Science

【 摘 要 】

Seabirds are marine top predators and accumulate high levels of metals and metalloids intheir tissues. Contamination by metals in the highly productive offshore region has becomea matter of public concern. It is home to 80% of the seabird population in the U.S.A., 95%of northern fur seals (Callorhinus ursinus), and major populations ofSteller sea lions (Eumetopias jubatus), walruses (Odobenusrosmarus) and whales. Here, the concentrations of eight heavy metals (Hg, Cd,Cr, Co, Ni, Cu, Zn and Pb) and a metalloid (As) in the liver and kidneys of the northernfulmar (Fulmarus glacialis), thick-billed murre (Urialomvia), short-tailed shearwater (Puffinus tenuirostris),tufted puffin (Fratercula cirrhata) and horned puffin (Fraterculacorniculata) collected in the Bering Sea were measured. As proxies of trophiclevel and habitat, nitrogen (δ15N) and carbon (δ13C) stable isotoperatios of breast muscles were also measured. Hepatic Hg concentration was high in northernfulmar, whereas Cd level was high in tufted puffin and northern fulmar. The Hgconcentration and δ15N value were positively correlated across individualbirds, suggesting that Hg uptake was linked to the trophic status of consumed prey.Furthermore, Hg concentration in our study was higher than those of the same species ofseabirds collected in 1990.

【 授权许可】

Unknown