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Date Permissions Signed

9-20-2012

Date of Award

2012

Document Type

Masters Thesis

Degree Name

Master of Science (MS)

Department

Environmental Sciences

First Advisor

Bodensteiner, Leo R.,1957-

Second Advisor

Sofield, Ruth M.

Third Advisor

Berseth, Polly

Abstract

Biological structures that develop incremental growth patterns over time present a unique opportunity to study chronological aspects of the organism's chemical environment. Spiny Dogfish (Squalus suckleyi), an abundant shark species, develop two dorsal spines that exhibit this type of growth pattern. The growth patterns on these spines have been used extensively as indicators of age. However, the chronological patterns of trace metal deposits in these spines have yet to be assessed. The main goals of this study were to develop the methods for analyzing this chronology and to explore techniques to analyze these data. Laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) is a recently developed analytical technique for studying spatially-distributed elemental compositions in solids. LA-ICP-MS was used to quantify the concentrations of zinc and strontium across the life histories of 18 Spiny Dogfish. Metal accumulation and size differed between sharks caught at two sampling locations. This method was able to chronologically relate metal deposition to age in individuals of this species.

Type

Text

Publisher

Western Washington University

OCLC Number

261640364

Digital Format

application/pdf

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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