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Effects Of Turbidity On Foraging Efficiency And Growth Of Salmonids In Natural Settings

EFFECTS OF TURBIDITY ON FORAGING EFFICIENCY AND GROWTH OF SALMONIDS IN NATURAL SETTINGS

by

Chad J. DeYoung

A Thesis

Presented to

The Faculty of Humboldt State University

In Partial Fulfillment

Of the Requirements for the Degree

Masters of Science

In Natural Resources: Fisheries Biology

August 2007

EFFECTS OF TURBIDITY ON FORAGING EFFICIENCY AND GROWTH OF SALMONIDS IN NATURAL SETTINGS

By

Chad J. DeYoung

Approved by the Master’s Thesis Committee:

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Margaret A. Wilzbach, Committee Chair Date

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Lowell V. Diller, Committee Member Date

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Bret C. Harvey, Committee Member Date

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Terry D. Roelofs, Committee Member Date

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Stephen A. Smith, Associate Dean Date

ABSTRACT

Effects of Turbidity on Foraging Efficiency and Growth of Salmonids in Natural Settings

Chad J. DeYoung

Elevated turbidity and suspended sediment loads have been documented to negatively effect salmonids and their habitats. Laboratory studies have demonstrated the effect of elevated turbidity levels on the physiology and behavior of salmonids. However, the effects of turbidity on fish in a natural setting are largely uncertain. The goal of...