11885
Here we examined the relationships between cases of ciguatera poisoning , from 1994 to 2011 , and : ( i ) coral cover , used as a proxy of reef state , ( ii ) the densities of herbivorous fishes , and ( iii ) reef disturbances .
 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