17582
Experimental populations were then transferred into semi - natural tidal ponds and correlates of individuals ' fitness ( growth and survival ) were monitored over a period of 6 months .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities:  
Answer:
 None