8584
There was a large spatial variation in individual contaminant intensity and profile , while tissue pollution levels were strongly and negatively associated with condition indices , suggesting an important impact of pollution on the health of sub - adult resident eels .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None