Acoustic telemetry to assess post-stocking dispersal and mortality of razorback sucker Xyrauchen texanus |
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Authors: | A P Karam † B R Kesner † P C Marsh † |
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Institution: | Native Fish Laboratory, School of Life Sciences, Arizona State University, P. O. Box 874501, Tempe, AZ 85287-4501, U.S.A. |
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Abstract: | Acoustic telemetry and scuba revealed immediate and high post-stocking mortality of razorback sucker Xyrauchen texanus in Lake Mohave, U.S.A., a Colorado River impoundment. At the conclusion of this 6 month study, only three of 19 (16%) study fish remained active. Concurrently, 20 X. texanus implanted with acoustic transmitters and held in a hatchery raceway remained healthy throughout the experiment and no transmitters were shed. Post-stocking mortality was probably due to predation by striped bass Morone saxatilis , a piscivorous non-native fish. |
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Keywords: | Colorado River endangered species predation repatriation surgical mortality transmitter retention |
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