Brad Griffith, former leader of the Cooperative Fish and Wildlife Research Unit at UAF, will discuss his extensive studies of changes in Interior lakes and wetlands at the Tuesday meeting of the Tanana Valley Sportsmen’s Association. The meeting will start at 7 p.m. and the public is invited to attend. TVSA is located next to the Best Western hotel across from Fred Meyer West. For more information, call 907-488-2884.