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Filtering by: Committee Member Mason, Barbara J. Degree Field Fisheries Science

Sex determination in Nile tilapia, Oreochromis niloticus: gene expression, masculinization methods, and environmental effects

Creator:

Sánchez, Wilfrido M. Contreras

Abstract:

Sex differentiation in fish is a labile process that allows sex inversion in several species. The inherent capacity of fish germ cells to differentiate into oocytes or spermatocytes constitutes a key factor allowing for functional sex inversion. This thesis set out to determine the mechanism involved in steroid-induced sex differentiation...

Resource Type:

Dissertation

Full Text:

unconditional support and continuous advice during the course of this research. Bob Mason, Barbara Shields and
Fish movement and assemblage dynamics in a Pacific Northwest riverscape

Creator:

Baxter, Colden V.

Abstract:

This study examined fish movements and assemblage dynamics in the Wenaha, Grande Ronde, Snake river system of northeast Oregon and southeast Washington. I investigated the role of fish movement in the dynamics of stream fish assemblages and evaluated relationships between species movement, assemblage structure, and the heterogeneity of habitat at...

Resource Type:

Dissertation
The Oregon Coastal Subprovince, a new biogeographic subprovince for primary freshwater fishes in Oregon

Creator:

Kettratad, Jes

Abstract:

The Pacific Northwest has a relatively low diversity of primary freshwater fishes with most of the endemism and diversity in the Columbia River and Klamath River. However, the Oregon Coastal Subprovince defined as the coastal rivers from Miami River in the north to Sixes River in the south, has a...

Resource Type:

Dissertation

Full Text:

manuscript and serving on my committee. I thank Dr. Barbara Shields for all the moral support and