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Biology and Production of Net-Spinning Caddisflies (Hydropsychidae And Philopotamidae) in a Regulated Portion Of The Brazos River, Texas

Four species of net-spinning caddisflies, Hydropsyche simulans Ross, Cheumatopsyche lasia Ross, Cheumatopsyche campyla Ross and Chimarra obscura (Walker) are common in the regulated portions of the Brazos River. Hydropsyche simulans spun capture nets with the largest meshdimensions; the two Cheumatopsyche species' nets had the next largest meshes, and Chimarra obscura spun nets with the smallest dimensions. Cheumatopsyche lasia and C. campyla constructed nets with similar sized meshes. The number of individuals m~2 and standing crop biomass were not significantly different among low, medium, and high velocities. Early hydropsychid instars fed on detritus while later instar H. simulans and C. campyla had larger proportions of animal material. Guts of later instar C. lasia individuals had a greater percentage of algae and diatoms.

Identiferoai:union.ndltd.org:unt.edu/info:ark/67531/metadc331549
Date05 1900
CreatorsMalas, Diane M. (Diane Mary)
ContributorsStewart, Kenneth W., Dickson, Kenneth L., Zimmerman, Earl G., Beitinger, Thomas L., Stark, Bill P.
PublisherNorth Texas State University
Source SetsUniversity of North Texas
LanguageEnglish
Detected LanguageEnglish
TypeThesis or Dissertation
Formatv, 84 leaves : ill., Text
CoverageUnited States - Texas
RightsPublic, Malas, Diane M. (Diane Mary), Copyright, Copyright is held by the author, unless otherwise noted. All rights reserved.

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