Now showing items 4719-4738 of 9682

  • Laboratory evaluation of red-tide control agents 

    Marvin KT; Proctor R Jr (, 1967)
    Red-tide toxicants were evaluated based on the following requirements: 100% lethality to Gymnodinium breve within 24 hours at concentrations of 0.01 p.p.m. or less and a selectivity threshold concentration at 0.1 p.p.m. ...
  • Laboratory evaluation of red-tide control agents. 

    Marvin, K.T.; Proctor, R.R., Jr. (, 1966)
    No abstract available
  • A laboratory method for the culture of Acartia tonsa (crustacea: copepoda) using rice bran 

    Turk, P.E.; Krejci, M.E.; Yang, W.T. (, 1982)
    The calanoid copepod Acartia tonsa was cultured in rectangular tanks filled with 170L of natural sea water. Rice bran added to the culture water provided all the nutrient enrichment necessary to raise A. tonsa throughout ...
  • Laboratory studies relating to development of feeds and feeding systems for penaeid shrimp 

    Chen, Houng-Yung (Texas A&M University, 1983)
    This report describes laboratory studies which were focused on developing feeds and feeding strategies for efficient postlarval and juvenile penaeid shrimp rearing through experimental manipulation of environmental factors ...
  • Laboratory Study of a Dynamic Berm Revetment 

    Ward, Donald L.and John P. Ahrens (, 1992)
    No abstract available
  • Laboratory Study of Aeration as a Feasible Technique for Dewatering Fine-Grained Dredged Material 

    Environmental Engineering Consultants, Inc. (U.S. Army Engineer Waterways Experiment Station, 1976)
    The purpose of this study was to examine analytically and experimentally the potential feasibility for employment of aeration as a means of hastening the drying of fine-grained dredged material. Laboratory experiments were ...
  • Laboratory Study of the Release of Pesticide and PCB Materials to the Water Column During Dredging and Disposal Operations 

    Fulk R; Gruber D; Wullschleger R (, 1975)
    Sediments, water column water, and interfacial water samples were obtained from dredged areas located in Calumet Harbor, Chicago; Green Bay near the mouth of the Fox River, Wisconsin; Mt. Hope Bay near Fall River, ...
  • Lady Bird Johnson. Our Environmentalist First Lady 

    Gould, Lewis L. (, 1999)
    No abstract available
  • Laguna Madre estuary: a study of the influence of freshwater inflows. 

    Texas Department of Water Resources (Texas Department of Water Resources, 1983)
    The Texas Water Plan of 1968 tentatively allocated specific annual amounts of water to supplement freshwater inflow to Texas' bays ad estuaries. These amounts were recognized at the time as no more than preliminary estimates ...
  • Laguna Madre Estuary: economic impact of recreational activity and commercial fishing 

    Daniel R. Resenmaier, et. Al. (Texas Agricultural Experiment Station, Texas A&M University System, 1987)
    This report conducts the first study reviewing the economic impact from recreational activity and commercial fishing. Indicators are identified and data collected to determine the economic impact. This report is one in a ...
  • Laguna Madre Project Quarterly Report - September 9, 1951 to December 31, 1951 

    Miles, Dewey W. (Texas Game and Fish Commission, 1952)
    This report is the first of the present investigation known as Laguna Madre Project. The investigation covers the entire Laguna Madre from Corpus Christi to Port Isabel on the Texas Gulf Coast. The project is divided into ...
  • Lake Bastrop 

    Texas Parks and Wildlife (, 1992)
    This article covers the newest nominee for intensive large-mouth bass management by the Texas Parks and Wildlife Department -- Lake Bastrop. Lake Bastrop is a small, 900-acre, power plant cooling reservoir in the Lost Pines ...
  • Lake Como Quadrangle. Texas - Galveston Co. 

    U.S. Army Corps of Engineers, Army Map Service. (U.S. Geological Survey., 1977)
    A topographic map accurately represents the natural and manmade features of the land. USGS topographic maps are compiled to National Map Accuracy Standards using modern mapping techniques. The shape and elevation of the ...
  • Lake Houston watershed: waste treatment management agencies population study. Draft. 

    Houston - Galveston Area Council, Community and Environmental Planning. (Houston - Galveston Area Council, Community and Environmental Planning., 1983)
    This report presents updated estimates and revised projections of population for census tracts and sewer service areas within the Lake Houston watershed. During the initial phase of water quality management planning ...
  • Lake Houston, Harris County, Texas. 

    National Eutrophication Survey. (, 1977)
    Annual total phosphorus and total nitrogen loading to the lake were estimated and subdivided according to either point or non -point source origin. An assessment of the lake's trophic condition and limiting nutrients is ...
  • Lake Stephenson Quadrangle. Texas. 

    U.S. Geological Survey (U.S. Geological Survey., 1977)
    A topographic map accurately represents the natural and manmade features of the land. USGS topographic maps are compiled to National Map Accuracy Standard using modern mapping techniques. The shape and elevation of the ...
  • Lakes and Ponds 

    Woodward, Susan L. (Greenwood Press, 2003)
    A lake is any water-filled depression on land that is cut off from an inflow of ocean water. Any such body of water -from a puddle to one of the Great Lakes - can be considered a lake, although many people call smaller, ...
  • A laminar-flow choice chamber for testing the responses of postlarval penaeids to olfactants 

    Benfield, M.C.; Aldrich, D.V. (, 1991)
    A laminar-flow dichotomous choice chamber has been developed for testing the responses of postlarval brown shrimp. Penaeus aztecus, and white shrimp, Penaeus setiferus, to olfactants. Test animals were provided with equal ...
  • Land - State Alternatives for Planning and Management 

    Council of State Governments Task Force on Natural Resources and Land Use Information and Technology (Council of State Governments, 1975)
    In June 1973, the Council of State Governments created a Task Force on Natural Resources and Land Use Information and Technology, whose major purpose was to foster discussion and review of related problems and programs in ...
  • Land and water resources-Houston-Galveston Area Council. 

    St. Clair, A.E.; Proctor, C.V., Jr.; Fisher, W.L.; Kreitler, C.W.; McGowen, J.H. (University of Texas at Austin, Bureau of Economic Geology, 1975)
    No abstract available