10 research outputs found
Possible lin between elevated accumulation of trace elements and canine distemper virus infection in the Caspian seals (Phoca caspica) stranded in 2000 and 2001
In the Caspian Sea, a die-off of thousands of Caspian seals (Phoca caspica) occurred in 1997 and 2000. While a direct cause for these deaths seems to be canine distemper virus (CDV) infection, immunosuppression due to
environmental pollutants is considered as one of the possible explanations for the development of the disease. The
purpose of this work is to examine whether exposure to trace metals could be one of the factors involved in the mass
mortality of Caspian seals. Concentrations of 13 trace elements weredetermined in liver, kidney and muscle of Caspian
seals found stranded along the coasts of the Caspian Sea in 2000 and 2001. Concentrations of toxic elemen ts (Ag, Cd, Hg, Tl and Pb) in the Caspian seals collected in 2000 and 2001 were comparable to or lower than those in healthy
Caspian seals collected in 1993 and 1998 and in seals from other regions, suggesting that these elements would not be the
causative agent for the death of Caspian seals. In contrast, Zn and Fe concentrations in the stranded Caspian seals were
apparently higher than those in seals from other locations. These results suggest the disturbance in homeostatic control
and nutritional statu s of essential elements in the stranded Caspian seals
Trace element accumulation in short-tailed albatrosses (Diomedea albatrus) and black-footed albatrosses (Diomedea nigripes) from Torishima Island, Japan
Concentrations of 19 trace elements (V, Cr, Mn, Co, Cu, Zn, Ga, Se, Rb, Sr, Mo, Ag, Cd, Sb, Cs, Ba, Hg, Tl,
and Pb) were determined in liver, kidney, muscle, feather and stomach content of
short-tailed albatross
and feather of
black-footed albatross from Torishima Island, Japan. For most of the elements, concentrations in liver and kidney were
higher than those in muscle and feather, whereas concentrations of Ga, Sr and Ba were highest in feather of short-taled
albatross. Metal concentrations in tissues of short-tailed albatross were within the range of those reported for albatrosses
from other locations. Concentrations of Cr, Mn, Hg and Pb were relatively low in the tissues of short-tailed albatross,
indicating less contamination by those metals in this species of Torishima Island. No significant differences were observed
in metal concentrations in feather between short-tailed albatross and black-footed albatross. To our knowledge, this is the
first report on the trace element accumulation in tissues of short-tailed albatross