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Date Permissions Signed

2-10-2013

Date of Award

2013

Document Type

Masters Thesis

Degree Name

Master of Science (MS)

Department

Environmental Sciences

First Advisor

Helfield, James M.

Second Advisor

Bodensteiner, Leo R., 1957-

Third Advisor

Matthews, Robin A., 1952-

Abstract

The Salish sucker (Catostomus sp.) is a recently described endemic fish species with a patchy distribution and a narrow geographic range in western Washington and southwestern British Columbia. In this study I examined populations within the Nooksack River watershed, attempting to elucidate the environmental factors contributing to observed patterns of distribution and abundance. I hypothesized that hypoxic and hyperthermic conditions during the summer months would restrict Salish sucker distribution. I tested this hypothesis by measuring dissolved oxygen concentrations, temperature, and Salish sucker abundance and movement at eight sites in the Bertrand Creek and Fishtrap Creek sub-basins. The results of this study did not support my original hypothesis; instead it seems more likely that physical habitat characteristics rather than water quality exert greater influence in patterns of abundance and distribution. My findings emphasize the importance of maintaining the quality and connectivity of habitat for Salish sucker conservation.

Type

Text

Publisher

Western Washington University

OCLC Number

828190786

Digital Format

application/pdf

Geographic Coverage

Nooksack River Watershed (Wash.); Bertrand Creek Watershed (B.C. and Wash.); Fishtrap Creek Watershed (B.C. and Wash.)

Genre/Form

Academic theses

Language

English

Rights

Copying of this thesis in whole or in part is allowable only for scholarly purposes. It is understood, however, that any copying or publication of this thesis for commercial purposes, or for financial gain, shall not be allowed without the author's written permission.

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