page_title: Lake lamprey
section_title: Diet
hierarchical_section_title: Lake lamprey / Diet
caption_attribution_description: English: Title: The Canadian field-naturalist Identifier: canadianfieldnat1987otta (find matches) Year: 1987 (1980s) Authors: Ottawa Field-Naturalists' Club Subjects: Publisher: Ottawa, Ottawa Field-Naturalists' Club Contributing Library: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library Digitizing Sponsor: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library View Book Page: Book Viewer About This Book: Catalog Entry View All Images: All Images From Book Click here to view book online to see this illustration in context in a browseable online version of this book. Text Appearing Before Image: 188 The Canadian Field-Naturalist Vol. 101 Text Appearing After Image: Figure 2. Distribution of the Lake Lamprey, Lampetra macrostoma. Trout, other salmonids such as Dolly Varden, Salvelinus malma, are attacked. No Pacific Lamprey adults or ammocoetes have been found in the same areas as the Lake Lamprey. Pacific Lamprey do exist in the river flowing out of Lake Cowichan, but it is unknown if they occur in the lake. The timing and length of spawning period of the Lake Lamprey is different from that of the Pacific Lamprey that occur in the same area of British Columbia (Beamish 1980). The lake spawning habit and the late spawning period could offer effective isolation from the Pacific Lamprey. It is important to note that this lamprey readily survives and feeds as a young adult in freshwater whereas its. close relative, the Pacific Lamprey, can not be kept as a young adult in freshwater (Beamish 1980, unpublished data). Limiting Factors Unknown. Special SigniHcance of the Species The Lake Lamprey is endemic to Canada and is only known to exist on Vancouver Island. It is of considerable scientific interest, but it is unlikely that the general public in Canada would understand or Note About Images Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.
context_page_description: The lake lamprey, Entosphenus macrostomus, also known as the Vancouver lamprey or Cowichan lamprey, a recent derivative of the pacific lamprey, is a species of freshwater lamprey endemic to two North American lakes: Lake Cowichan and Mesachie Lake in Vancouver Island, Canada. The lamprey was originally called the Vancouver Island lamprey, until an error in filing shortened it to the Vancouver lamprey. The alternate common name of "Cowichan lamprey" was coined and promoted by the species' describer, Dr. Dick Beamish, who originally identified the species in the 1980s.
context_section_description: The adults of several lamprey species, including those of the lake lamprey, are hematophagous predators that latch onto other fish species to feed on their bodily fluids. Young salmonids such as cutthroat trout and the coho salmon are common prey. Wounds have been known to penetrate into the body cavity of hosts, though the majority of prey are only scarred and are not fatally wounded. Only 15% of prey are mortally injured from lamprey feedings. Lampreys are one of the leading predators of salmonids, as shown by the high frequency of salmonids with scars (50-80%) found in the lakes.
caption: Distribution, highlighting the lakes
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