Field Notes
U.S. Fish & Wildlife Service
Field Notes Entry   
San Bernardino National Wildlife Refuge Staff Clear Section of Black Draw for Fish Barrier
Southwest Region, February 1, 2012
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With funding from the Department of Homeland Security Tactical Infrastructure mitigation, San Bernardino NWR is constructing a fish barrier to be placed in Black Draw, one of the headwater tributaries of the Río Yaqui in Mexico. The purpose of the barrier is to prevent nonnative fish species from pioneering upstream from Mexico and into wetlands on the refuge. The main threats are channel catfish, mosquitofish, and green sunfish. The barrier will be placed upstream on the refuge to allow refuge staff to capture any native fish pioneering up from Mexico, such as Mexican stoneroller and Yaqui sucker. To get a jump on some of the construction, refuge staff began clearing a fifty-foot section in Black Draw at the proposed site of the barrier. Clearing the area at this time also serves to protect nesting bird species and allowed for refuge staff to pole plant limbs from removed cottonwoods and willows prior to their budding out. It is hoped that the construction can begin in earnest this coming winter.

Contact Info: Christopher Lohrengel, 520-364-2104 x.106, chris_lohrengel@fws.gov
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