Get access

FISH ASSEMBLAGES AT ENGINEERED AND NATURAL CHANNEL STRUCTURES IN THE LOWER MISSOURI RIVER: IMPLICATIONS FOR MODIFIED DIKE STRUCTURES

Authors

  • J. T. Schloesser,

    1. Kansas Cooperative Fish and Wildlife Research Unit, Division of Biology, Kansas State University, Manhattan, Kansas, USA
    2. U.S. Fish and Wildlife Service, Ashland Fish and Wildlife Conservation Office, Ashland, Wisconsin, USA
    Search for more papers by this author
  • C. P. Paukert,

    Corresponding author
    1. Kansas Cooperative Fish and Wildlife Research Unit, Division of Biology, Kansas State University, Manhattan, Kansas, USA
    • U.S. Geological Survey, Missouri Cooperative Fish and Wildlife Research Unit, 302 Anheuser-Busch Natural Resources Building, Department of Fisheries and Wildlife Sciences, University of Missouri, Columbia, Missouri, USA
    Search for more papers by this author
  • W. J. Doyle,

    1. U.S. Fish and Wildlife Service, Columbia Fish and Wildlife Conservation Office, Columbia, Missouri, USA
    Search for more papers by this author
  • T. D. Hill,

    1. U.S. Fish and Wildlife Service, Columbia Fish and Wildlife Conservation Office, Columbia, Missouri, USA
    Search for more papers by this author
  • K. D. Steffensen,

    1. Nebraska Game and Parks Commission, Lincoln, Nebraska, USA
    Search for more papers by this author
  • V. H. Travnichek

    1. Missouri Department of Conservation, St Joseph, Missouri, USA
    Search for more papers by this author

  • This article is a US Government work and is in the public domain in the USA.

C. P. Paukert, U.S. Geological Survey, Missouri Cooperative Fish and Wildlife Research Unit Research Unit, 302 Anheuser-Busch Natural Resources Building, Department of Fisheries and Wildlife Science, University of Missouri, Columbia, Missouri 65211, USA.

E-mail: paukertc@missouri.edu

ABSTRACT

Large rivers throughout the world have been modified by using dike structures to divert water flows to deepwater habitats to maintain navigation channels. These modifications have been implicated in the decline in habitat diversity and native fishes. However, dike structures have been modified in the Missouri River USA to increase habitat diversity to aid in the recovery of native fishes. We compared species occupancy and fish community composition at natural sandbars and at notched and un-notched rock dikes along the lower Missouri River to determine if notching dikes increases species diversity or occupancy of native fishes. Fish were collected using gill nets, trammel nets, otter trawls, and mini fyke nets throughout the lower 1212 river km of the Missouri River USA from 2003 to 2006. Few differences in species richness and diversity were evident among engineered dike structures and natural sandbars. Notching a dike structure had no effect on proportional abundance of fluvial dependents, fluvial specialists, and macrohabitat generalists. Occupancy at notched dikes increased for two species but did not differ for 17 other species (81%). Our results suggest that dike structures may provide suitable habitats for fluvial species compared with channel sand bars, but dike notching did not increase abundance or occupancy of most Missouri River fishes. Published in 2011 by John Wiley & Sons, Ltd.

Get access to the full text of this article

Ancillary