Document Type

Thesis - Open Access

Award Date

1987

Degree Name

Master of Science (MS)

Department

Wildlife and Fisheries Science

Abstract

Rainbow trout (Salmo gairdneri) cage culture techniques were investigated in dugouts as part of a continuing program to evaluate the potential of small-scale, landowner-based aquaculture operations. Trout raised in the study did not reach a marketable size (200 g) due to the short growing season and small size at stocking. No significant (P >0.05) differences in growth were detected between stocking densities of 60, 80, 100, and 120 fish/m³. Demand feeding resulted in significantly greater length (P≤0.01), weight (P≤0.01), and relative weight (P≤0.05) than hand feeding in both years tested. Rainbow trout of the Hildebrand strain reached a significantly greater (P≤0.01) length, weight, and relative weight than those of the Growth or Kamloops strains. Hildebrand strain rainbow trout also had significantly (P≤0.01) better food conversion ratios than the other two strains. Due to the short growing season it is not economically feasible to raise rainbow trout in eastern South Dakota dugouts at this time. It is recommended that further trout culture work be centered on more heat tolerant strains.

Library of Congress Subject Headings

Rainbow trout
Fish stocking -- South Dakota

Description

Includes bibliographical references (pages 83-93)

Format

application/pdf

Number of Pages

114

Publisher

South Dakota State University

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