dammed, preventing use of upstream areas for spawning. The Gulf sturgeon is apparently unable 

 to pass through dam s\ stems. 



In addition to the structures preventing Gulf sturgeon from reaching spawning areas, dredging, 

 desnagging. and spoil deposition carried out in connection with channel improvement and 

 maintenance represent a threat to the Gulf sturgeon. Although precise spawning areas are not 

 known, indications are that deep holes and rock surfaces are important for spawning. 

 Modification of such features, especially in rivers in which upstream migration is limited by 

 dams, could further jeopardize the reduced stocks of the Gulf sturgeon. 



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