EXPOSED-POPULATION FACTORS ^ 



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ENVIRONMENTAL FACTORS ^ 



CONVENTIONAL WATER QUALITY ^ 

 PROXIMITY TO CONTAMINANT SOURCES 

 CONTAMINATION OF WATER/SEDIMENTS 

 SPECIES AVAILABLE FOR HARVEST 

 ORGANISM ACTIVITY MODE ^ 

 SEASONAL BIOLOGICAL CYCLES « 

 ORGANISM SIZE 

 ORGANISM AGE 

 ORGANISM SEX 

 LIPID CONTENT OF TISSUE 



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^ Harvest activities and dietary patterns of exposed population: 

 Mode of harvest refers to fishing technique (e.g., trap.net, or pole) 

 Mode of preparation refers to trimming and cooking technique 



^ Factors that influence contaminant concentrations in aquatic organisms 



'' Hardness, salinity, temperature, suspended solids 



^ Degree of mobility and contact with sediments 



® Reproductive, lipid storage, and growth cycles 



4 Population factor affects environmental factor 

 O Environmental factor affects population factor 

 • Mutual interaction between environmental and population factors 



Figure 3 Interaction between environmental factors and exposed 

 population factors. 



