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4,743 Matching Results
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Species Profiles: Life Histories and Environmental Requirements of Coastal Vertebrates and Invertebrates Pacific Ocean Region, Report 1, Green Turtle, Chelonia mydas
Abstract: Species profiles are literature summaries of the taxonomy, morphology, distribution, life history, and environmental requirements of aquatic species. They are designed to assist in environmental impact assessments. The green turtle, Chelonia mydas, is found throughout the Pacific Ocean region. Its status is listed as endangered by the International Union for Conservation of Nature and Natural Resources and as threatened in the U.S. Endangered Species Act and is included in Appendix 1 of the Convention on International Trade in Endangered Species of Wild Fauna and Flora. Females nest on a 20,3-, or >4-year cycle, laying one to six clutches per season and averaging between 100 and 110 eggs per clutch. Nesting normally takes place in the summer months. Hatching mortality from predation in the marine environment is thought to be high. After an initial >3-year carnivorous pelagic stage, green turtles become primarily herbivores, residing in shallow coastal areas where they feed on sea grass and/or algae. Growth rates appear to vary with diets and are generally slow. Turtles average 25 years to reach sexual maturity in Hawaii. Adult green turtles are long-lived and have few predators other than man. The use of modern equipment in hunting turtles and the disregard …
Date:
July 1989
Creator:
Forsyth, Robert G. & Balazs, George H.
Object Type:
Report
System:
The UNT Digital Library
Developing a Predation Index and Evaluating Ways to Reduce Salmonid Losses to Predation in the Columbia River Basin, Annual Progress Report August 1988-September 1989.
We are reporting progress on the predator-prey study for the period August 28, 1988 to September 1, 1989. The purpose of this research is to evaluate the feasibility of an index for assessment of predation in various reservoirs throughout the Columbia River basin, to describe the relationships among predator-caused mortality of smolts and physical and biological variables; to examine the feasibility of developing bounty, commercial or recreational fisheries on northern squawfish (Ptychocheilus oregonesis); and to develop a plan to evaluate the efficacy of predator control fisheries. Literature searches on predator abundance indexing and factors regulating fish population dynamics have been conducted; selected references have been summarized, and compiled in a key-word bibliography format. The feasibility of various types of predator abundance indices is being assessed; existing data relevant to mark-recapture, catch per unit effort (CPUE), physical and chemical variables, and reservoir morphology have been compiled, reviewed, and summarized. In cases where sufficient data exist, preliminary implementation of predator abundance indices has been demonstrated. Field sampling in John Day Reservoir was conducted during May to August, 1989 -- to continue time series data bases on northern squawfish CPUE and growth, and to evaluate the possibility of year class strength determinations of …
Date:
December 1989
Creator:
Nigro, Anthony A.
Object Type:
Report
System:
The UNT Digital Library
Self-Directed Learning Projects of Older Adults
This study determined the number of self-directed learning projects undertaken by older adults and examined the motivational factors and anticipated benefits related to the learning activities. In addition, obstacles to conducting self-directed learning were identified by the respondents. A list of 20,032 names of adults, aged 50 or more years and residing in Tom Green County, Texas, was obtained from voter registration rolls and the residential rolls of four retirement complexes. Four hundred names were randomly selected to serve as the sample of the study. Of the 400 potential subjects, 120 persons agreed to be interviewed. Indepth interviews were conducted using the questions from Tough's Interview Schedule for Studying Some Basic Characteristics of Learning Projects and a probe sheet to identify obstacles to conducting self-directed learning projects. The interviews focused on the learning activities of older adults during the previous year. The 120 subjects of this study conducted a total of 239 learning projects in the previous year, an average of 1.99 self-directed learning projects per person. Ninety-five (95%) percent of the persons interviewed reported to have conducted at least one learning project in the past year. The majority of the learning projects were self-planned for the purpose of self-enjoyment …
Date:
August 1989
Creator:
Sears, Emma Jo Benson
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Chronicles of Oklahoma, Volume 67, Number 2, Summer 1989
Quarterly publication containing articles, book reviews, photographs, illustrations, and other works documenting Oklahoma history and preservation.
Date:
Summer 1989
Creator:
Oklahoma Historical Society
Object Type:
Journal/Magazine/Newsletter
System:
The Gateway to Oklahoma History
Texas Turfgrass Research: 1987
Consolidated progress report providing a summary of research conducted at the experiment station during the prior year related to grass varieties used as turf, including growth and development, turfgrass cultivars, environment, pests, and culture.
Date:
June 1989
Creator:
Texas Agricultural Experiment Station
Object Type:
Report
System:
The Portal to Texas History
News & Views, Volume 11, Number 9, October 1989
Newsletter of the Texas Rehabilitation Commission discussing information about the Commission as well as news, events, and other relevant information.
Date:
October 1989
Creator:
Texas Rehabilitation Commission
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
News & Views, Volume 11, Number 4, April 1989
Newsletter of the Texas Rehabilitation Commission discussing information about the Commission as well as news, events, and other relevant information.
Date:
April 1989
Creator:
Texas Rehabilitation Commission
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Catching Our Breath: Next Steps for Reducing Urban Ozone
This report on urban ozone was requested by the Senate Committee on Environment and Public Works, the House Committee on Energy and Commerce, and its Subcommittee on Health and the Environment in anticipation of the upcoming reauthorization of the Clean Air Act. Of the air pollutants that the Act covers, ozone has been the most difficult to bring under control; it may well be the most expensive.
Date:
July 1989
Creator:
United States. Congress. Office of Technology Assessment.
Object Type:
Report
System:
The UNT Digital Library
Mineral Resources of the Medicine Lodge, Alkali Creek, and Trapper Creek Wilderness Study Areas, Big Horn County, Wyoming
From introduction: This report presents an evaluation of the mineral endowment (identified resources and mineral resource potential) of the study area and is the product of several separate studies by the U.S. Bureau of Mines (USBM) and the U.S. Geological Survey (USGS). Identified resources are classified according to a modification of the system described by McKelvey (1972) and the USBM and USGS (1980), which is shown in the Appendix. Identified resources are studied by the USBM. Mineral resource potential is the likelihood of occurrence of undiscovered metals and nonmetals, industrial rocks and minerals, and of undiscovered energy sources (coal, oil, gas, oil shale, tar, and geothermal sources). It is classified according to the system of Goudarzi (1984) and is shown in the Appendix. Undiscovered resources are studied by the USGS.
Date:
1989
Creator:
Hosterman, John W.; Hill, Randall H.; Kulik, Dolores M. & Gese, Diann D.
Object Type:
Report
System:
The UNT Digital Library
Polk County Enterprise (Livingston, Tex.), Vol. 107, No. 2, Ed. 1 Thursday, January 5, 1989
Semi-weekly newspaper from Livingston, Texas that includes local, state and national news along with advertising.
Date:
January 5, 1989
Creator:
White, Barbara
Object Type:
Newspaper
System:
The Portal to Texas History
University of Texas at Austin Department of Geological Sciences Newsletter, Number 39, September 1989
Newsletter of the University of Texas at Austin Department of Geological Sciences describing the department's research, news, events, and activities, as well as other topics of interest.
Date:
September 1989
Creator:
University of Texas at Austin. Department of Geological Sciences.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Geologic History and Hydrocarbon Potential of Late Cretaceous-Age, Low-Permeability Reservoirs, Piceance Basin, Western Colorado
From abstract: The Piceance basin of western Colorado contains large reserves of natural gas in low-permeability reservoirs of the Late Cretaceous-age Mesaverde Formation or Mesaverde Group. The gas accumulation can be divided into three general zones: a zone of surface-water invasion that extends inward a few miles from present outcrops, a gas-and-waterbearing zone that extends 10-20 miles inward from the water-bearing zone, and a central, predominantly gasbearing zone.
Date:
1989
Creator:
Johnson, Ronald Carl
Object Type:
Report
System:
The UNT Digital Library
Palacios Beacon (Palacios, Tex.), Vol. 82, No. 3, Ed. 1 Wednesday, January 18, 1989
Weekly newspaper from Palacios, Texas that includes local, state, and national news along with advertising.
Date:
January 18, 1989
Creator:
West, Nicholas M.
Object Type:
Newspaper
System:
The Portal to Texas History
Jacksboro Gazette-News (Jacksboro, Tex.), Vol. 108, No. 6, Ed. 1 Monday, June 12, 1989
Weekly newspaper from Jacksboro, Texas that includes local, state, and national news along with extensive advertising.
Date:
June 12, 1989
Creator:
McGee, Leigh
Object Type:
Newspaper
System:
The Portal to Texas History
Polk County Enterprise (Livingston, Tex.), Vol. 107, No. 35, Ed. 1 Sunday, April 30, 1989
Semi-weekly newspaper from Livingston, Texas that includes local, state and national news along with advertising.
Date:
April 30, 1989
Creator:
White, Barbara
Object Type:
Newspaper
System:
The Portal to Texas History
The Odem-Edroy Times (Odem, Tex.), Vol. 40, No. 35, Ed. 1 Thursday, August 31, 1989
Weekly newspaper from Odem, Texas that includes local, state, and national news along with advertising.
Date:
August 31, 1989
Creator:
Harris, Lillian
Object Type:
Newspaper
System:
The Portal to Texas History
Journal-Capital (Pawhuska, Okla.), Vol. 79, No. 80, Ed. 1 Saturday, October 7, 1989
Semiweekly newspaper from Pawhuska, Oklahoma that includes local, state, and national news along with advertising.
Date:
October 7, 1989
Creator:
Strahan, Treva
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Archer County News (Archer City, Tex.), No. 6, Ed. 1 Thursday, February 9, 1989
Weekly newspaper from Archer City, Texas that includes local, state, and national news along with advertising.
Date:
February 9, 1989
Creator:
Lobpries, F. Mike & Lobpries, Fran
Object Type:
Newspaper
System:
The Portal to Texas History
The Mathis News (Mathis, Tex.), Vol. 66, No. 35, Ed. 1 Thursday, August 31, 1989
Weekly newspaper from Mathis, Texas that includes local, state, and national news along with advertising.
Date:
August 31, 1989
Creator:
Sullivan, Charles
Object Type:
Newspaper
System:
The Portal to Texas History
Rains County Leader (Emory, Tex.), Vol. 101, No. 33, Ed. 1 Thursday, February 2, 1989
Weekly newspaper from Emory, Texas that includes local, state, and national news along with advertising.
Date:
February 2, 1989
Creator:
Becknell, Kathleen Hill
Object Type:
Newspaper
System:
The Portal to Texas History
Duval County Picture (San Diego, Tex.), Vol. 4, No. 50, Ed. 1 Wednesday, December 13, 1989
Weekly newspaper from San Diego, Texas that includes local, state, and national news along with advertising.
Date:
December 13, 1989
Creator:
Cardenas, Alfredo E.
Object Type:
Newspaper
System:
The Portal to Texas History
Jacksboro Gazette-News (Jacksboro, Tex.), Vol. 108, No. 29, Ed. 1 Monday, November 20, 1989
Weekly newspaper from Jacksboro, Texas that includes local, state, and national news along with extensive advertising.
Date:
November 20, 1989
Creator:
McGee, Leigh
Object Type:
Newspaper
System:
The Portal to Texas History
Mineral Resources of the Indian Creek, Bridger Jack Mesa, and Butler Wash Wilderness Study Areas, San Juan County, Utah
From abstract: The Indian Creek (UT-060-164), Bridger Jack Mesa (UT-060-167), and Butler Wash (UT-060-169) Wilderness Study Areas are located in San Juan County, southeastern Utah. Inferred subeconomic resources of sandstone and sand and gravel exist within all three wilderness study areas, but because of their abundance throughout the region, their distance from current markets, and their lack of unique properties, these materials have no current likelihood for development.
Date:
1989
Creator:
Patterson, Charles G.; Toth, Margo I. & Case, James E.
Object Type:
Report
System:
The UNT Digital Library
Chickasha Daily Express (Chickasha, Okla.), Vol. [97], No. [268], Ed. 1 Sunday, January 22, 1989
Daily newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.
Date:
January 22, 1989
Creator:
Drew, Charles C.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History