A.21.5. RESEARCH ACTIVITIES AND INFORMATION USED 
(None reported.) 
A.21.6. RESEARCH NEEDS 
• Research on nutria pheromonal attractants and weaknesses in reproductive biology is 
needed. 
• Research on zebra mussels and their control techniques in lakes and rivers is needed. 
• Species-specific fish control techniques are needed. 
• Innovative control techniques for snakeheads that would allow officials to apply a lethal 
control need to be developed. 
• Information on chemicals that would either attract fish or exclude them from areas needs 
to be collected. 
• A contained area to study snakeheads in order to develop innovative techniques to sample 
and control them is needed. 
• Information on better Phragmites control methods, other than herbicides (e.g., biocontrol) 
needs to be collected. 
A-60 
