STUDY NUMBER ; 2.5 



ORGANIZATION ; Montana Department of Fish Wildlife and Parks 

 ( MDFWP ) 



TITLE OF STUDY ; 



Analyses of Metal Residues in Crayfish and Brown Trout 

 from the Clark Fork River 



CONTACT: Glenn Phillips - MDFWP, Helena - 444-2406 



OBJECTIVE ; To determine if heavy metals are accumulating in 

 crayfish exoskeltons and brown trout liver tissues. 



DURATION ; August 1984--completion of study (determined by 

 preliminary results and future need) 



CURRENT STATUS ; Crayfish were collected from eight locations 

 below Milltown Dam in September 1984. The cadmium and copper 

 content of these organisms was analyzed by the Gordon 

 Laboratory at the University of Montana. 



Brown trout were collected from eleven locations above 

 Milltown Dam in August of 1984. Livers were dissected in the 

 field, placed on ice and frozen the same day they were 

 collected. 



FUTURE ACTIVITIES ; A report outlining the results of the 

 crayfish analyses will be prepared in the winter of 1986. 



The analysis of the brown trout liver samples has been 

 delayed due to limited funds. Analysis may take place in 



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