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Acoustic telemetry to assess post-stocking dispersal and mortality of razorback sucker Xyrauchen texanus

Authors

  • A. P. Karam,

    Corresponding author
    1. Native Fish Laboratory, School of Life Sciences, Arizona State University, P. O. Box 874501, Tempe, AZ 85287-4501, U.S.A.
      *Tel.: +1 480 965 2548; fax: +1 480 965 6899; email: abraham.karam@asu.edu
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  • B. R. Kesner,

    1. 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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  • P. C. Marsh

    1. Native Fish Laboratory, School of Life Sciences, Arizona State University, P. O. Box 874501, Tempe, AZ 85287-4501, U.S.A.
    Search for more papers by this author

*Tel.: +1 480 965 2548; fax: +1 480 965 6899; email: abraham.karam@asu.edu

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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