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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.

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Showing 201 to 210 of 627 (0.045 seconds)

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201

FACTORS INFLUENCING DECREASED GROWTH OF TROUT IN ASHURST LAKE (ARIZONA)

Simms, Jeffrey Randall, 1962- January 1987 (has links)
Before 1980, Ashurst Lake had an exceptionally productive rainbow trout fishery. More recently, Ashurst has become turbid and trout growth rates have declined substantially. The growth, condition, and food habits of a single cohort of rainbow trout was followed from May 1985 until October of 1986. The first year, trout in Ashurst grew from 66 mm to 164 mm in 5 months. Growth reached an average of 24 mm/month from June to September, a time when trout fed primarily on Daphnia. By July of the second year, growth had stopped and condition declined substantially in conjunction with a change in their diet from Daphnia to crayfish and minnows. The decrease in growth rate was attributed to a decrease in the food base coupled with hampered foraging abilities of rainbow trout in water with high turbidity. High tubidity may have resulted from erosion of the surrounding watersheds.
Rainbow trout.
Trout fisheries -- Arizona.
Ashurst Lake (Ariz.)
202

Dendroclimatology in the San Francisco Peaks region of northern Arizona, USA /

Salzer, Matthew W. January 2000 (has links) (PDF)
Thesis (Ph. D.)--University of Arizona, 2000. / Includes bibliographical references. Also available online.
203

A geology training manual for Grand Canyon National Park /

Wagner, Stacy S. January 1900 (has links)
Thesis (M.S.)--Oregon State University, 2003. / Typescript (photocopy). Includes bibliographical references (leaves 171-174). Also available via the World Wide Web.
204

An economic development plan for the Model Cities program

MacDonald, Peter David, 1946- January 1973 (has links)
No description available.
City planning -- Arizona -- Tucson.
Tucson (Ariz.) -- Economic policy.
205

A STATISTICAL ANALYSIS OF ACTIVITY ORGANIZATION: GRASSHOPPER PUEBLO, ARIZONA

Ciolek-Torrello, Richard Sigmund, 1949- January 1978 (has links)
No description available.
Social institutions.
Social structure.
Grasshopper Pueblo site (Ariz.)
206

ENZYME VARIATION IN ASHMUNELLA LEVETTEI (BLAND) (GASTROPODA: POLYGYRIDAE)

Fairbanks, Harold Lee January 1979 (has links)
No description available.
Ashmunella.
Huachuca Mountains (Ariz. and Mexico)
207

Group organization and activity patterns of desert bighorn sheep

Chilelli, MaryEllen January 1981 (has links)
No description available.
Bighorn sheep -- Behavior.
Social behavior in animals.
Harquahala Mountains (Ariz.)
208

Tucson lighting, 1882-1912, with information on lighting the historic interior

Orlando, Catherine Maier January 1981 (has links)
No description available.
Lighting -- History.
Tucson (Ariz.) -- Lighting.
209

Tactite alteration and its late stage replacement in the southern half of the Rosemont mining district, Arizona

McNew, Gregory E. January 1981 (has links)
No description available.
Tactite.
Metasomatism (Mineralogy)
210

Sensitivity of frequency and canopy cover to changes in vegetation

Mirreh, Mohamed Mohamud January 1981 (has links)
No description available.
Rangelands -- Research -- Arizona.
Rangelands -- Arizona.
Santa Rita Experimental Range (Ariz.)

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