Field Notes
U.S. Fish & Wildlife Service
Field Notes Entry   
Rio Grande Silvery Minnow Stocking
Southwest Region, November 4, 2004
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Nearly 60,000 endangered Rio Grande silvery minnow were stocked into the Rio Grande near Albuquerque, NM 3-5 November 2004. The R2 Fisheries Program, lead for all captive propagation and augmentation efforts for Rio Grande silvery minnow, provided about 33,000 fish raised at Dexter National Fish Hatchery and Technology Center. An additional 26,000 fish were provided by City of Albuquerque facilities for the stocking efforts. Biologists from New Mexico Fishery Resources Office, with support from Dexter,City and other FWS personnel,used rafts and fish transport containers to strategically place the fish in low velocity habitats along channel margins in the Rio Grande from the town of Bernalillo downstream approximately 15 river miles. Such placement of fish contributes to increased survivability of the stocked fish by allowing time for acclimation in protective habitats. Monitoring data indicate that stocked fish are surviving, accounting for more than one third of all adults sampled during monitoring efforts. The increase in number of young Rio Grande silvery minnow collected during monitoring and salvage/transplant efforts is due in part to the successful stockings, along with increased number of days of high flows in 2004.

Contact Info: Martin Valdez, 505-248-6599, martin_valdez@fws.gov
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