Hi, here is Dr. Parker Stone in China Three Gorges University call for international cooperation.

Specifically, we are aiming to investigate the spawning population under the GeZhou Dam (past data showed there was only severl square miles area available for Chinese sturgeon spawning), which inhibits Chinese sturgeon migrate upstream (Not the Three Gorges Dam, as Gezhou Dam is down stream to Three Gorges Dam). We are looking for the most efficient way to know how many adults are there, how many actually spawns, how many eggs on the substrate. The adult sturgeons are not allowed to be captured by any way in the next few years, so now all researchers can not mark any of the wild ones. The more precise, the better.