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Filtering by: Creator Spackman, David A. Degree Field Fisheries Science

Evaluating the Ecological Trade-Offs of Riparian Thinning for Stream Ecosystems in Second-Growth Redwood Forests of Northern California

Creator:

Roon, David A.

Abstract:

Riparian forests provide a myriad of ecosystem functions for adjacent streams and rivers, and due to these linkages, changes in riparian forest conditions can have direct implications for stream ecosystems. Resource managers in the coast redwood forests (Sequoia sempervirens) of northern California (USA) are actively thinning second-growth stands to accelerate...

Resource Type:

Dissertation

Full Text:

Forests of Northern California by David Alexander Roon A DISSERTATION submitted to
Effects of acute stress and tagging on the swimming performance and physiology of Pacific lampreys (Lampetra tridentata)

Creator:

Close, David A.

Abstract:

Pacific lampreys (Lampetra tridentata) have declined in abundance in the Columbia River Basin. Although, the reasons for the decline are unclear, we suggest that development of hydroelectric dams and habitat alterations in tributaries as the main causes. The available knowledge of life history of Pacific lampreys and status from dam...

Resource Type:

Masters Thesis

Full Text:

performance and physiology of Pacific lampreys (Lampetra tridentata) AN ABSTRACT OF THE THESIS OF David A
Identification of optimal broodstock for Pacific Northwest oysters

Creator:

Stick, David A.

Abstract:

The United States Pacific Northwest is well known for its shellfish farming. Historically, commercial harvests were dominated by the native Olympia oyster, Ostrea lurida, but over-exploitation, habitat degradation, and competition and predation by non-native species has drastically depleted their densities and extirpated many local populations. As a result, shellfish aquaculture...

Resource Type:

Dissertation

Full Text:

ABSTRACT OF THE DISSERTATION OF David A. Stick for the degree of Doctor of Philosophy in Fisheries