Archives of Environmental Contamination and Toxicology

, Volume 42, Issue 3, pp 354-362

First online:

Elevated Concentrations of Trace Elements in Caspian Seals (Phoca caspica) Found Stranded During the Mass Mortality Events in 2000

  • Y. AnanAffiliated withCenter for Marine Environmental Studies (CMES), Ehime University, Tarumi 3-5-7, Matsuyama 790-8566, Japan
  • , T. KunitoAffiliated withCenter for Marine Environmental Studies (CMES), Ehime University, Tarumi 3-5-7, Matsuyama 790-8566, Japan
  • , T. IkemotoAffiliated withCenter for Marine Environmental Studies (CMES), Ehime University, Tarumi 3-5-7, Matsuyama 790-8566, Japan
  • , R. KubotaAffiliated withCenter for Marine Environmental Studies (CMES), Ehime University, Tarumi 3-5-7, Matsuyama 790-8566, Japan
  • , I. WatanabeAffiliated withDepartment of Environmental Conservation, Tokyo University of Agriculture and Technology, Saiwai-cho 3-5-8, Fuchu 183-8509, Japan
  • , S. TanabeAffiliated withCenter for Marine Environmental Studies (CMES), Ehime University, Tarumi 3-5-7, Matsuyama 790-8566, Japan
  • , N. MiyazakiAffiliated withOtsuchi Marine Research Center, Ocean Research Institute, University of Tokyo, Akahama, Otsuchi-cho, Iwate 028-1102, Japan
  • , E. A. PetrovAffiliated withLimnological Institute of the Siberian Division of the Academy of Science of Russia, Ulan Batorskaya 3, Irkutsk 664033, Russia

Rent the article at a discount

Rent now

* Final gross prices may vary according to local VAT.

Get Access

Abstract

Concentrations of V, Mn, Fe, Cr, Co, Cu, Zn, As, Se, Mo, Ag, Cd, Tl, Hg, Pb, and organic mercury (Org-Hg) were determined in liver, kidney, and muscle of healthy Caspian seals (Phoca caspica) collected in 1998. These concentrations were compared with those of seals infected with canine distemper virus (CDV) found stranded along the coastal areas in 2000. Concentrations of toxic elements (As, Ag, Cd, Tl, Hg, Pb, and Org-Hg) in Caspian seals stranded in 2000 were comparable or lower than those of samples collected in 1998 and in other pinnipeds. Thus it may be inferred that these elements were not the causative agents in the deaths of the seals. In contrast, concentrations of Zn and Fe were much higher in diseased Caspian seals than those in other pinnipeds. Zinc concentrations in all tissues of Caspian seals also increased during 1993–2000. Furthermore, negative correlations were found between blubber thickness and hepatic and renal Zn concentrations. These results imply the disturbance in homeostatic control and nutritional status of essential elements in Caspian seals stranded in 2000.