Use of main channel and shallow-water habitat by larval fishes in the lower Missouri River

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Use of main channel and shallow-water habitat by larval fishes in the lower Missouri River

Please use this identifier to cite or link to this item: http://hdl.handle.net/10355/4376

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Title: Use of main channel and shallow-water habitat by larval fishes in the lower Missouri River
Author: Reeves, Kerry S. (Kerry Scott)
Date: 2006
Publisher: University of Missouri--Columbia
Abstract: I developed a series of research objectives organized in a spatial hierarchy to characterize larval fish nursery habitat within the lower Missouri River. Native carpsucker spp./buffalo spp. (Carpiodes spp./Ictiobus spp.) and chub spp. (Macrhybopsis spp.) catch-per-unit-effort (CPUE) was higher within sandbar aquatic terrestrial transition zone (ATTZ) than main channel. Local-environmental factors accounted for the greatest proportion of variance in larval fish CPUE within sandbar ATTZ, followed by hydrologic and finally geomorphic factors at macro- and meso-habitat scales. At the microhabitat scale, the larval fish assemblage and carpsucker spp./buffalo spp. selected areas [lesser than or equal to] 10 cm deep with current velocities [lesser than or equal to] 5 cm/s. Silver/bighead carp (Hypophthalmichthys molitrix/nobilus) exhibited no selection based on water depth or current velocity. Chub spp. selected depths between 20-50 cm and areas 2-3 m from the waters edge. The larval fish assemblage and several taxa exhibited a significant nocturnal increase in CPUE within the primary channel and sandbar ATTZ at the macrohabitat scale in contrast to previous research indicating turbid rivers lacked a diel cycle in larval fish drift.
URI: http://hdl.handle.net/10355/4376
Other Identifiers: ReevesK-121506-D5629

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