Document Type

Thesis - Open Access

Award Date

1983

Degree Name

Master of Science (MS)

Department

Wildlife and Fisheries Science

First Advisor

Charles G. Scalet

Abstract

Rainbow trout (Salmo gairdneri) reared in 1 m³ cages in a South Dakota dugout pond grew and survived as well or better than most cage-cultured rainbow trout reported in the literature. Significant differences (P≤0.01) in mean length, weight, and food conversion, and similarity in relative weight between trout fed 2 and 4% of body weight daily, indicated that the optimum feeding rate was near 3% for this size range (35=100g). Daily rations based on fish size and water temperature need to be developed for trout reared in a lentic environment. The high cost of fingerlings was the limiting factor in a hypothetical dugout culture operation. Great water transparency seemed to be the major factor contributing to increased primary production, phytoplankton standing crop, and diel dissolved oxygen levels in comparisons between two unstocked dugout ponds. Suspension of sediments by wind actions may have been greater in the older pond because it was 18% larger in surface area but only 66% as deep as the never pond.

Library of Congress Subject Headings

Rainbow trout
Fish-culture -- South Dakota
Ponds -- South Dakota

Description

Includes bibliographical references (pages 46-52)

Format

application/pdf

Number of Pages

60

Publisher

South Dakota State University

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