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Standing between Life and ExtinctionEthics and Ecology of Conserving Aquatic Species in North American Deserts$
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David Propst, Jack Williams, Kevin Bestgen, and Christopher Hoagstrom

Print publication date: 2021

Print ISBN-13: 9780226694337

Published to Chicago Scholarship Online: May 2021

DOI: 10.7208/chicago/9780226694504.001.0001

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PRINTED FROM CHICAGO SCHOLARSHIP ONLINE (www.chicago.universitypressscholarship.com). (c) Copyright University of Chicago Press, 2022. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in CHSO for personal use.date: 28 June 2022

The Exotic Dilemma

The Exotic Dilemma

Lessons Learned from Efforts to Recover Native Colorado River Basin Fishes

Chapter:
(p.167) 11 The Exotic Dilemma
Source:
Standing between Life and Extinction
Author(s):

Brandon Albrecht

Ron Kegerries

Ron Rogers

Paul Holden

Publisher:
University of Chicago Press
DOI:10.7208/chicago/9780226694504.003.0011

Native fishes of desert-aquatic ecosystems have been dramatically impacted by nonnative species. Over time, habitat modification and degradation set the stage for the influx of many nonnative taxa. Traditionally, nonnative-fish control has meant attempting to eliminate every individual from habitats of interest. In larger systems, this has proven impossible, and managers have sought ways for nonnatives and natives to coexist by reducing stressors on natives. This chapter describes the nonnative-fish dilemma, lessons learned, and possible pathways for remediation, with a focus on the Colorado River basin. It is argued that greater habitat complexity and more natural flow regimes help natives and nonnatives coexist and concludes that a multiplicity of tools and techniques, along with improved education and public outreach, remain important for conserving native fishes.

Keywords:   desert fishes, Colorado River, nonnative fish control, habitat complexity, nonnative species, public outreach

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