Non-Native Species Monitoring and Control, San Juan River 1998-1999. ProgressReport for the San Juan River Recovery Implementation Program

摘要

The mechanical removal of non-native fishes in the San Juan River initially beganin October 1995, but was not formally instituted as an ongoing management tool until 1998. This interim report summarizes and presents the results of monitoring and removal efforts for 1998 and 1999. The primary objectives of this portion field activities for the San Juan River Recovery Implementation Program (SJRIP) are to evaluate the efficacy of passive (netting) and active (electrofishing) mechanical methods for removal of large-bodied non-native fishes, to characterize changes in the abundance and distribution patterns of channel catfish as a response to mechanical removal efforts, and to assess the feasibility of a transplantation program to remove channel catfish from the San Juan River and relocate them to isolated impoundments currently used for recreational fisheries.