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

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

Included in

Biology Commons

Share

COinS
 
 

To view the content in your browser, please download Adobe Reader or, alternately,
you may Download the file to your hard drive.

NOTE: The latest versions of Adobe Reader do not support viewing PDF files within Firefox on Mac OS and if you are using a modern (Intel) Mac, there is no official plugin for viewing PDF files within the browser window.