971 resultados para Steamboats -- Great Lakes (North America) -- History.


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Some plates printed on both sides of leaves.

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I. General history.--Chronology.--Lake vessels.--II. Biographical.

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"Answer to the strictures of Mr. T. Falconer": and "Mr. Falconer's reply to Mr. Greenhow's answer, with Mr. Greenhow's rejoinder".

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"This treatise is in a large measure a revised republication of certain chapters of the author's large book on Parliamentary practice and procedure in Canada".--Prefatory note.

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Published also as Smithsonian contributions to knowledge: v.III, art. 4; v. V, art t; v. X [art. 2]

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The sea lamprey Petromyzon marinus (Linnaeus) is both an invasive non-native species in the Laurentian Great Lakes of North America and an imperiled species in much of its native range in North America and Europe. To compare and contrast how understanding of population ecology is useful for control programs in the Great Lakes and restoration programs in Europe, we review current understanding of the population ecology of the sea lamprey in its native and introduced range. Some attributes of sea lamprey population ecology are particularly useful for both control programs in the Great Lakes and restoration programs in the native range. First, traps within fish ladders are beneficial for removing sea lampreys in Great Lakes streams and passing sea lampreys in the native range. Second, attractants and repellants are suitable for luring sea lampreys into traps for control in the Great Lakes and guiding sea lamprey passage for conservation in the native range. Third, assessment methods used for targeting sea lamprey control in the Great Lakes are useful for targeting habitat protection in the native range. Last, assessment methods used to quantify numbers of all life stages of sea lampreys would be appropriate for measuring success of control in the Great Lakes and success of conservation in the native range.

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Water chestnut (Trapa natans L.,sensu lato) is an annual, floating-leaved aquatic plant of temperate and tropical freshwater wetlands, rivers, lakes, ponds, and estuaries. Native to Eurasia and Africa, water chestnut has been widely gathered for its large nutritious seed since the Neolithic and is cultivated for food in Asia. Water chestnut is now a species of conservation concern in Europe and Russia. Introduced to the northeastern United States in the mid-1800s, the spread of water chestnut as a nuisance weed was apparently favored by cultural eutrophication. Water chestnut is considered a pest in the U.S. because it forms extensive, dense beds in lakes, rivers, and freshwater-tidal habitats.

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Covers the history of the study of boring sponges, taxonomy and distributions. Also includes identification of species, descriptions, key, references and plates. (PDF contains 30 pages)

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This archive contains materials relating to the Great Lakes Waterways Development Association. The collection contains correspondence, financial information, clippings, biographical materials, media releases, presentations and publications. The bulk of the materials are correspondence.