25 resultados para Delaware and Raritan Canal Company (N.J.)
em Aquatic Commons
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This is the Kendal, Lancaster and Preston canal fishery produced by Lancashire River Authority in 1970. The Kendal-Lancaster-Preston canal commenced at Stainton in Westmorland and terminated on the outskirts of Preston. Fishing in the canal with rod and line was controlled by the Northern Anglers’ Association. In the early 60’s anglers, had complained about, the extremely low numbers of fish that had been caught in the canal and various opinions had been expressed concerning the alleged shortages o f fish. Since 1967, in an endeavour to meet the fish re-stocking demands of the Association, 50,000 freshwater fish of different species had been introduced by the Lancashire River Authority, but catches had not increased. In 1969 was agreed by the Northern Anglers’ Association to carry out a study of the fish populations throughout the whole length of the canal and the chemical quality of the water analysed. This report is not produced as a scientific dissertation, but rather as a means of imparting to members of the Northern Anglers’ Association the fish potential available to them in their endeavours to catch fish.
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The Chesapeake and Delaware Canal is a man-made waterway connecting the upper Chesapeake Bay with the Delaware Bay. It started in 1829 as a private barge canal with locks, two at the Delaware end, and one at the Chesapeake end. For the most part, natural tidal and non-tidal waterways were connected by short dredged sections to form the original canal. In 1927, the C and D Canal was converted to a sea-level canal, with a controlling depth of 14 feet, and a width of 150 feet. In 1938 the canal was deepened to 27 feet, with a channel width of 250 feet. Channel side slopes were dredged at 2.5:1, thus making the total width of the waterway at least 385 feet in those segments representing new cuts or having shore spoil area dykes rising above sea level. In 1954 Congress authorized a further enlargement of the Canal to a depth of 35 feet and a channel width of 450 feet. (pdf contains 27 pages)
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Leonard Carpenter Panama Canal Collection. Photographs: Views of Panama and the Canal. [Box 1] from the Special Collections & Area Studies Department, George A. Smathers Libraries, University of Florida.
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Leonard Carpenter Panama Canal Collection. Photographs: Views of Panama and the Canal. [Box 1] from the Special Collections & Area Studies Department, George A. Smathers Libraries, University of Florida.
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Leonard Carpenter Panama Canal Collection. Publication: Panama Canal Review Special Edition. [Box 1] from the Special Collections & Area Studies Department, George A. Smathers Libraries, University of Florida. This special edition features articles on Panama reprinted from THE PANAMA CANAL REVIEW, which began publication May 5, 1950. These articles, for which there have been many requests for reprints, have been selected from issues published between 1965 and 1973. Review articles may be reprinted without further clearance (69 page document)
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Leonard Carpenter Panama Canal Collection. Photographs: Views of Panama and the Canal. [Box 1] from the Special Collections & Area Studies Department, George A. Smathers Libraries, University of Florida.
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Leonard Carpenter Panama Canal Collection. Photographs: Views of Panama and the Canal. [Box 1] from the Special Collections & Area Studies Department, George A. Smathers Libraries, University of Florida.
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Leonard Carpenter Panama Canal Collection. Photographs: Views of Panama and the Canal. [Box 1] from the Special Collections & Area Studies Department, George A. Smathers Libraries, University of Florida.
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Leonard Carpenter Panama Canal Collection. Photographs: Views of Panama and the Canal. [Box 1] from the Special Collections & Area Studies Department, George A. Smathers Libraries, University of Florida.
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Leonard Carpenter Panama Canal Collection. Photographs: Views of Panama and the Canal. [Box 1] from the Special Collections & Area Studies Department, George A. Smathers Libraries, University of Florida.
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Leonard Carpenter Panama Canal Collection. Photographs: Views of Panama and the Canal. [Box 1] from the Special Collections & Area Studies Department, George A. Smathers Libraries, University of Florida.
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Leonard Carpenter Panama Canal Collection. Photographs: Views of Panama and the Canal. [Box 1] from the Special Collections & Area Studies Department, George A. Smathers Libraries, University of Florida.
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Leonard Carpenter Panama Canal Collection. Photographs: Views of Panama and the Canal. [Box 1] from the Special Collections & Area Studies Department, George A. Smathers Libraries, University of Florida. Booklet dedication: Published under the direction of a committee appointed by Brigadier General Clarence S. Ridley, Governor of The Panama Canal, to arrange suitable ceremonies, as authorized in Public Resolution No.5, 76th Congress, approved March 28, 1939, to celebrate the twenty-fifth anniversary of the opening of the Panama Canal to commerce. Prepared by Rufus Hardy, Executive Department, The Panama Canal. (120 page document)
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ENGLISH: Strong coastal upwelling occurs in the Gulf of Panama regularly each year during the season, from about January through April, when strong northerly winds are blowing offshore. Because of the evident importance of upwelling to the ecology of the Gulf of Panama, we commenced in the fall of 1954 a study of various physical, chemical, and biological phenomena associated therewith. Observations were taken at bi-weekly intervals at a fixed location in the Gulf (approximately 10 miles SE of Taboga Island) to supplement the serial observations of sea level, sea temperature, and winds that have been gathered for many years by the Panama Canal Company. SPANISH: Cado año, en la estación de enero a abril, cuando los vientos del norte soplan vigorosamente frente a la costa, ocurre en el Golfo de Panamá un fuerte afloramiento costanero. Se cree que este afloramiento periódico en el Golfo de Panamá es responsable de la alta productividad biológica que sostiene considerables cantidades de organismos de importancia comercial. Esta región, por ejemplo, es una fuente importante de la especie Cetengraulis mysticetus) pez de carnada para el atún, (Alverson y Shimada, 1957) y mantiene una considerable pesca de camarones llamados langostinos (Burkenroad, Obarrio y Mendoza,1955). (PDF contains 54 pages.)
Effects of suspended sediments on the development of eggs and larvae of striped bass and white perch
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The possible ecological effects of suspended sediments are manifold. Briefly, suspended sediments may cause an increased surface for microorganism growth, fewer temperature fluctuations, chemical adsorption or absorption, blanketing, mechanical-abrasive actions, and light penetration reduction (Cairns, 1968). Sherk and Cronin (1970) have pointed out that the above effects have been little studied in the estuarine environment. The ecological effects of suspended sediments on fish eggs and larvae may be of prime importance t o the C and D Canal area, an important spawning and primary nursery area for a variety of estuary: e species (Johnson,1972). This section discusses the effects of suspended sediment on the eggs and larvae of striped bass and white perch.