01491naa a2200241 a 450000100080000000500110000800800410001910000190006024500960007926000090017552008550018465000120103965000120105165000130106365000120107665000140108865000140110265300080111665300150112465300110113970000160115077300830116617927352017-03-28       1983    bl ---       0--  u    #d1 aHELWING, D. D.  aPolychlorinated biphenyl, mercury and cadmium concentrations in Minnesota snapping turtles.  c1983  aThe snapping turtle Chelydra serpentina may become an alternative choice to fish for monitoring pollutants in aquatic systems. They are common in many lakes and rivers throughout the eastern United States (CARR 1952; ERNST & BARBOUR 1972). They appear to remain abundant despite cadmium pollution (ROBISON & WELLS 1975; STONE 1980) and PCB pollution (STONE 1980). Since they are log-alived and remain relatively sedentary (HAMMER 1969), they make good indicators of local environments. Trends in local pollution may be obtained by comparing concentrations of the pollutant to the age of the turtle. Snapping turtles acumulate toxic compounds through their diet or by direct absorption by pharyngeal and cloacal respiration (HAMMER 1969). Fat bodies on the ventral side of the turtles (POND 1978) are good sites for lipophilic compounds to accumulate.  acadmium  amercury  atoxicity  aCádmio  aMercúrio  aTartaruga  aPCB  aToxicidade  aTurtle1 aHORA, M. E.  tBulletin of Environmental Contamination and Toxicologygv.30, p.186-190, 1983.