Technical Report

Progress Report - 2005 Contributions to Delisting Rio Grande Silvery Minnow: Egg Habitat Identification

URL: https://webapps.usgs.gov/mrgescp/documents/PorterandMassong_2005_ProgressReport2005ContributionstoDelistingRGSMEggHabitatIdentification.pdf

Date: 2006/01/01

Author(s): Porter M.D., Massong T.M.

Publication: U.S. Bureau of Reclamation Report, 39 p.

Abstract:

The nursery habitat project was initiated in 2003 with the purpose of substantiating egg retention in constructed nursery habitat inlets. The data from 2003 indicated that inlet features retained eggs, but that retention of the eggs varied greatly between inlets. The second year of the project examined how physical features contributed to the retention of silvery minnow and artificial eggs in constructed inlets and natural habitat features that currently exist in the Rio Grande. For 2005, the project studied retention of eggs and gellan beads (a.k.a. artificial eggs) on naturally formed bars and islands in the Albuquerque Reach (Figure 1). The purpose of this report is to present the 2005 study findings, summarize the finding for the entire 3-year project and offer recommendations for future studies.