Document Type

Thesis - Open Access

Award Date

1982

Degree Name

Master of Science (MS)

Department

Wildlife and Fisheries Science

Abstract

Nine-hundred-fifty-four rainbow trout (Salmo gairdneri) were stocked into 18 eastern South Dakota dugouts in April 1980 to determine the feasibility of dugouts for raising annual fish crops. Trout growth was compared between dugouts by stocking rate (1977/ha, 1483/ha, 988/ha, and 494/ha) and feeding combination [fathead minnows (Pimephales promelas) and supplemental feed, supplmental feed, and trout alone]. Chemical physical properties were also monitored in an old and new unstocked dugouts from July 1980 to July 1981. Growth was greater for 988/ha rainbow trout than the other stocking densities during the April 1980 to July 1980 sampling period. Mean total length increased from 139.7 to 230.3 mm and mean weight increased from 27.8 to 158.5 g. Due to high mortality (97.4%), it is believed that The optimal stocking density or production of trout was not totally determined. There was insufficient evidence to state that fathead minnows and supplemental feeding enhanced growth of trout. The old and new dugouts were comparable in chemical-physical properties by increasing from a summer minimum to winter maximum. Differences were detected in dissolved oxygen, hardness, and sulfate concentrations.

Library of Congress Subject Headings

Ponds -- South Dakota
Water quality -- South Dakota -- Measurement
Rainbow trout

Description

Includes bibliographical references (pages 55-61)

Format

application/pdf

Number of Pages

97

Publisher

South Dakota State University

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