Habitat selection by Smallmouth bass in response to physical characteristics of a simulated stream

  • Sechnick C
  • Carline R
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Abstract

Juvenile (14-16 cm total length) and adult (24-26 cm) smallmouth bass Micropterus dolomieui were studied in a laboratory stream tank to determine the influence of light, current velocity, substrate, and cover on habitat selection. These factors were varied singly and in com- bination for ranges of 30-4,000 lx light intensity; 1-47 and 0-20 cm?s current; substrates of sand (1 mm), gravel (15-40 mm), boulders with cobble filler (250 mm with 50-100 mm), and boulders with cobble removed; and three types of clear and opaque covers. Fish exhibited strong preferences for slow current (< 10 cm?s), low light (

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Authors

  • Carolyn W Sechnick

  • Robert F Carline

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