Document Type

Thesis - Open Access

Award Date

1968

Degree Name

Master of Science (MS)

Department

Wildlife Management

Abstract

Brook trout were introduced into the South Fork Yellow Bank River, an eastern South Dakota stream, on October 11, 1966. A supplemental brook trout plant was made on June 8, 1967. Survival for the initial plant from October, 1966 through October, 1967 was 2.4%. Survival for the supplemental plant from June, 1967 through October, 1967 was 21.0%. Trout from both plants took part in spawning activities during the fall of 1967. Average length of trout from the initial plant increased 9.8 cm during one year. Their average condition factor reached a peak in June, 1967 after being low throughout the winter. Average length and average condition factor of trout from the supplemental plant increased following stocking. Aquatic organisms made up most of the trout diet. Insects, both aquatic and terrestrial, were the most numerous organisms in trout stomachs while forage fish comprised the greatest volume of organisms in the stomachs. Trichoptera, Ephemeroptera, and Diptera were the predominate organisms found in benthos samples collected for forage ratio determinations. Forage ratios for the different orders varied throughout the study. Little relationship was found between the abundance of forage fish and the average number of fish in trout stomachs.

Library of Congress Subject Headings

Brook trout
Fishes -- Food

Description

Includes bibliographical references (pages 59-64)

Format

application/pdf

Number of Pages

76

Publisher

South Dakota State University

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