Date of Award
11-1983
Culminating Project Type
Thesis
Degree Name
Biological Sciences - Ecology and Natural Resources: M.S.
Department
Biology
College
College of Science and Engineering
First Advisor
Alfred J. Hopwood
Second Advisor
Ralph W. Gunderson
Third Advisor
Chester W. Buckley
Creative Commons License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.
Abstract
Two different laboratory streams were.used to examine the life cycles of Hydropsyche bifida and H. morosa (Trichoptera:Hydropsychidae). Effectiveness of the artificial streams was determined. Hydropsyche bifida and H. morosa were shown to be useful bioassay organisms. Variations of the species-specific larval head patterns were drawn for both H. oifida and H. morosa.
Field studies were used to determine niche·separations for H. bifida and H. morosa in riffle areas of the Sauk River, St. Cloud, Minnesota. Physical-spatial factors such as retreat material, substrate preference, area of riffle and location on substrate were used to evaluate thi's separation. Eggs found in the river were indistin-· guishable from laboratory eggs obtained. The river eggs developed and photographs were made of the first instar, tentatively identified as Hydropsyche sp.
OCLC Number
10381668
Recommended Citation
Voelz, Neal J., "Observations on the Life Cycles of Hydropsyche bifida Banks and Hydropsyche morosa Hagen (Trichoptera: Hydropsychidae)" (1983). Culminating Projects in Biology. 3.
https://repository.stcloudstate.edu/biol_etds/3
