Lower Colorado River MSCP Native Fish Database Management Grant

The Lake Mohave [Lower Colorado River (LCR)] Native Fish Database began under the direction of P. C. Marsh and the late W. L. Minckley, Arizona State University (ASU) in 1988. Beginning in 2009 responsibility for these data transferred from ASU to Marsh & Associates (M&A) under continued direction of P. C. Marsh. Tagging of native fishes in the LCR began in the late 1970�s with external tags being fixed to razorbacks in Lake Mohave. Over time, native fish tagging and the native fish data base have evolved to include numerous species, tag types, and geographic locations. Current tagging protocols include the use of both wire and Passive Integrated Transponder (PIT) tags throughout the LCR corridor. As scanned, PIT tags read either 7-, 9-, or 10- character alphanumeric sequences of any possible combinations of the digits 0 through 9 and letters A through F; HDX tags that are now in the database have 7 hexadecimal digits (0-9, A-F).

Field data acquired by the Native Fish Work Group (NFWG) participants from bonytail, flannelmouth sucker, and repatriated (stocked) and wild adult razorback suckers are regularly generated and fish augmentation programs are expected to stock tens of thousands of native fish each year. All this data is incorporated into the native fish database, which is then accessible in a user friendly database.