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  • All fields: Biological control
(172 results)



Display: 20

    • Aily Zirkle oral history transcript

    • Biography; Birds; Employees (USFWS); Biological control; Education; Environmental quality; Environmental education; Winter sports; Wildlife viewing; Wildlife refuges; Villages; Migratory birds; Surveying; Migration;
    • Aily Zirkle oral history interview as conducted via radio interview.
    • Phragmites again!

    • Aquaculture; Aquatic environments; Aquatic plants; Biological control; Ecosystem recovery; Employees (USFWS); Environmental quality; Foliage; Habitat conservation; Habitat fragmentation; Habitat restoration; Invasive species; Resource management;...
    • Alligator River National Wildlife Refuge employee inspects a patch of phragmites, an invasive species on the refuge.
    • Regrowth area

    • Adults; Agricultural ecosystems; Agriculture; Aquatic environments; Aquatic plants; Banks; Biological control; Boating; Boats; Coastal environments; Ecosystem recovery; Emblems; Equipment; Fire management; Foliage; Habitat conservation; Habitat...
    • Area of regrowth.
    • Toxicity of 22 therapeutic compounds to six fishes

    • Document; Freshwater fishes; Mollusks; Biologists (USFWS); Biological control; Fires; Fisheries management;
    • First work: Of 22 therapeutic chemicals (18 parasiticides and 4 oral bacteriostats) tested by bioassays, 16 were toxic to fish and 6 were not. Second work: Bayer 73, a molluscicide sold commercially as Bayluscide, is highly toxic to 18 species of...
    • National Wildlife Refuge maintenance

    • Biological control; Employees (USFWS); Environmental quality; Equipment; Habitat conservation; Habitat restoration; Invasive species; Maintenance; Plants; Refuges; Wildlife refuges;
    • Fish and Wildlife Service employee chain sawing to control exotic invasive melaleuca.
    • National Wildlife Refuge maintenance

    • Biological control; Employees (USFWS); Environmental quality; Equipment; Habitat conservation; Habitat restoration; Invasive species; Maintenance; Plants; Wildlife refuges;
    • Fish and Wildlife Service employee chain sawing to control exotic invasive melaleuca. Vertical.
    • National Wildlife Refuge maintenance

    • Biological control; Employees (USFWS); Habitat conservation; Invasive species; Maintenance; Plants; Wildlife refuges;
    • Fish and Wildlife Service employee pulling out Brazilian pepper plants to try to control the exotic invasive.
    • Fish and Wildlife Employee Sprays Melaleuca

    • Biological control; Employees (USFWS); Equipment; Habitat conservation; Habitat restoration; Invasive species; Maintenance; Plants; Refuges; Wildlife refuges;
    • Fish and Wildlife Service employee spraying exotic invasive melaleuca to try to control the exotic invasive. Vertical.
    • Fish and Wildlife Service employee showing invasive plant

    • Biological control; Employees (USFWS); Environmental quality; Habitat conservation; Habitat restoration; Invasive species; Maintenance; Plants; Refuges; Wildlife refuges;
    • Fish and Wildlife Service employee standing at edge of wetland area being taken over by invasive species water hyacinth and holding two plant specimens to show leaves and root systems. Vertical.
    • Fish and Wildlife Service employee eradicating Invasive

    • Biological control; Employees (USFWS); Environmental quality; Equipment; Habitat conservation; Habitat restoration; Invasive species; Maintenance; Plants; Refuges; Wildlife refuges;
    • Fish and Wildlife Service employee with axe, chopping at melaleuca tree trunk in refuge invasive species eradication program.
    • Regrowth

    • Adults; Agricultural ecosystems; Agriculture; Amphibious vehicles; Aquatic environments; Aquatic plants; Banks; Biological control; Boating; Boats; Coastal environments; Ecosystem recovery; Emblems; Equipment; Fire management; Foliage; Habitat...
    • FWS employee examines an area of regrowth from an airboat.
    • A talk with Nancy Langston

    • Biological control; Biologists (USFWS); Diseases; Environmental education; Farms and farming; Podcast; Public Lecture;
    • In 1941 the Food and Drug Administration approved the use of diethylstilbestrol (DES), the first synthetic chemical to be marketed as an estrogen and one of the first to be identified as a hormone disruptor—a chemical that mimics hormones. Its...
    • Jerry L. Wilson oral history transcript

    • Biography; Biological control; Conservation; Employees (USFWS); History; Lakes; Maintenance; Management; Military; Fishing; Public attitudes; Public access; Realty; Wetlands; Birds; Prescribed burning; Wildlife refuges;
    • Jerry L. Wilson oral history interview as conducted by Denny Holland.
    • Laboratory studies on antimycin A as a fish toxicant

    • Document; Freshwater fishes; Mollusks; Biologists (USFWS); Biological control; Fires; Fisheries management;
    • Laboratory studies on antimycin A as a fish toxicant. Liquid and sand formulations of antimycin A were tested in laboratory waters of various temperature, hardness, pH, and turbidity agains 31 species of fresh-water fish of various izes and life...
    • Tom Butler

    • Biodiversity; Biological control; Wilderness; Podcast; Public Lecture;
    • Mark Madisoin speaks with Tom Butler at the Sc3 Conference held at the NCTC in Shepherdstown, WV. Tom is the editorial projects director for the Foundation for Deep Ecology, and a long-time conservation activist focused on wilderness and...

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