597
The number of fecal pellets ingested peaked at 5 to 6 weeks old ( 13 pellets / day ) and gradually decreased , thereafter ( 2 . 1 pellets at 78 weeks old , 1 . 5 pellets at 104 weeks old ) .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
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