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Last modified
7/14/2009 5:02:31 PM
Creation date
5/22/2009 7:41:45 PM
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UCREFRP
UCREFRP Catalog Number
7790
Author
Tyus, H. M., W. P. Dwyer and S. Whitmore.
Title
Feasibility of Preventing Further Invasion of the Zebra Mussel into the Western United States.
USFW Year
1993.
USFW - Doc Type
\
Copyright Material
NO
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The U.S. Army Corps of Engineers <br />has studied the transport of zebra <br />mussels in the inland waterways and <br />determined that barges are very likely <br />responsible for the rapid spread of the <br />mussels throughout the inland system. <br />Of note is the case of a single barge <br />that travelled 14,000 miles through <br />the inland waterway system between <br />May 1991 to May 1992. On May 11, <br />1992, zebra mussels were observed on <br />the barge, occurring: "... in clusters <br />every 2 to 3 feet along the bottom edge <br />of the rub rail ... 10 to 50 zebra <br />mussels were found in each cluster." <br />(U.S. Army Corps of Engineers 1993). <br />The size of the mussels suggested that <br />they attached to the barge in 1991. <br />These mussels probably spread during <br />reproductive periods and perhaps <br />anytime when the barge scraped along <br />locks and other facilities, dislodging <br />the adult mussels. <br />The downstream spread of zebra <br />mussels in the Mississippi system and <br /> <br />~. Natural <br />YES - <br />NO .. <br />YES - <br />NO <br />a. currents ^ ^ <br />b. birds ^ ^ <br />c, other animals ^ ^ <br />2. Huffman YES NO YES NO <br />d. canals(may include pumps) ^ ^ <br />e. ballast water ^ ^ <br />f. vessels ^ ^ <br />g. buoys ^ ^ <br />h. marina/fishing equipment ^ ^ <br />i. fish stocking, bait buckets ^ ^ <br />j. trucking water ^ ^ <br />k. intentional movements ^ ^ <br />I. aquaria releases ^ ^ <br />m. amphibious airplanes ^ ^ <br />n. recreational equipment ^ ^ <br />o. litter, garbage ^ ^ <br />p. scientific research ^ ^ <br />TABLE 2. DISPERSAL MECHANISMS FOR ZEBRA MUSSELS AFTER CARLTON, 1993). <br />NOTE: SOME CATEGOR/ES HAVE BEEN COMB/NED~. <br />its lateral transportation due to <br />commercial water traffic will not be a <br />factor in the further western dispersion <br />of zebra mussels in the United States. <br />(Note: There are some streams that <br />enter the United States from contami- <br />Hated areas in Canada, and this <br />problem will be discussed later). Thus, <br />downstream colonization by zebra <br />mussel veligers, a major problem in the <br />Eastern United States, is not viewed as <br />great a problem for direct western <br />
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