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Seasonal resource selection by blue suckers Cycleptus elongatus

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Telemetry data were used to quantify seasonal resource selection and rank-preferred habitat types for blue suckers Cycleptus elongatus in the middle Missouri River and its tributaries, Iowa, Nebraska, South Dakota, U.S.A. Habitat diversity required by C. elongatus to complete its annual life-history cycle was evident by interseasonal variation in habitat selection. Tributaries and unchannelized portions of the middle Missouri River system were selected during the inferred spawning season (spring), habitats along shorelines in the channelized middle Missouri River were selected for postspawning (summer) and areas of reduced current were generally selected for the period preceding spawning (autumn). This study provides insight into mature C. elongatus behaviour throughout its annual life cycle. Furthermore, these results document the interseasonal variability in habitat selection of C. elongatus and highlight the need for development of habitat selection models for other imperilled fish species in aquatic systems affected by anthropogenic developments.
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Keywords: compositional analysis; large rivers; tributaries

Document Type: Regular Paper

Affiliations: 1: University of Nebraska-Lincoln, School of Natural Resources, 402 Hardin Hall, Lincoln, NE 68583, U.S.A. 2: Nebraska Game and Parks Commission, 2200 North 33rd Street, Lincoln, NE 68503, U.S.A.

Publication date: 01 March 2010

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