00000nam 2200000zi 4500 9.949717 CaOODSP 20250402125007 m o d f cr |n||||||||| 250402e196111##oncdab ob f|0| 0 eng d CaOODSP eng rda CaOODSP n-cn-on Fs52-2/710E-PDF Thomas, Martin L. H., author. The distribution of sea lamprey ammocoetes in the lake of eight rivers draining into the Canadian waters of Lake Superior / M.L.H. Thomas. London, Ontario : Fisheries Research Board of Canada, Biological Station, November, 1961. 1 online resource (74 pages) : charts, illustrations, maps. text txt rdacontent computer c rdamedia online resource cr rdacarrier Manuscript report series (biological) ; no. 710 Digitized edition from print [produced by Department of Fisheries and Oceans]. Includes bibliographical references. "Eight sea lamprey-producing rivers flow into areas of the lake explored in this survey. Sea lamprey ammocoetes were found off six of them in greatly varying numbers. The discovery of sea lamprey ammocoetes on an island off one of the rivers gave evidence that they traversed deep water; evidence that they live there has been collected using poison and an anchor dredge. Due to difficulties in sampling a large enough area, numbers captured have been too small for a reasonable population estimate. The numbers suggest, however, that ammocoetes may be just as numerous in deep water as they were in the better sampled shore areas"--Summary, page 1. Petromyzon marinus Ontario. Lamproie marine Ontario. Fisheries Research Board of Canada. Biological Station (London, Ont.), issuing body. Manuscript report series (biological) no. 710. (CaOODSP)9.812823 PDF 14.70 MB https://publications.gc.ca/collections/collection_2025/mpo-dfo/fs52-2/Fs52-2-710-eng.pdf