** FILE **Fish wholesalers check some 500 frozen tunas before the day's auction at a Misaki fish market, near Tokyo, in this Sunday, June 15, 1997 file photo. International fisheries officials are expected to push for a global tracking system that would certify the origin of every tuna headed to market at an unprecedented conference that convenes Monday to reverse a sharp decline in tuna catches. (AP Photo/Shizuo Kambayashi, File)