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Table of Contents List of Tables and Figures ................. .. ....................... . ii I. Cultural Significance, Population Trends, and Life History of the Pacific Lamprey Introduction Cultural Significance - - - - - - - - -i Utilitarian Significance................................... 2 Ecological Significance 2 Historical Distribution ''''''''''''''''''''''''''''...................................'''''-'' 5 Current Distribution........................... 5 Current Status .................................... 5 Lamprey Life History S p aw ning .. ......................................... . . 13 Spawning Habitat ............... .................... 13 Spawning Behavior 14 Larval Stage .............................................................................. 14 Habitat Use 15 Metamorphosis............................................. 15 Young Adult/Downstream Migration 16 Ocean Life .....--..----------1..6 Feeding . 17 Upstream Migration.......................................17 Potential Factors Affecting Lamprey' Decline Poor Habitat Conditions ...................................18 Fish Poisoning Operations .................................18 Water Pollution ... 18 Dam Passage ...........................................18 Ocean Conditions ........................................19 II. Recommendations for Immediate Management and Enhancement Actions . . . . 20 III. Recommendations for Research and Data Gathering ....................21 A. Abundance Studies .......................21 B. Distribution Studies . .. ...... .. ....................... 23 C. Passage Studies 24 D . H abitat Studies ................................................................................ 26 E. Transplantation .............. , ........ ........ 27 F. Artificial Production .....................----.. ........ 28 IV. Conflicts With Restoration and Recovery of Columbia River Salmonids ..... ., ,29
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R eferences ......................................................
Close, David A.; Parker, Blaine & James, Gary.Status Report of the Pacific Lamprey (Lampetra Trzdentata) in the Columbia River Basin.,
report,
July 1, 1995;
United States.
(https://digital.library.unt.edu/ark:/67531/metadc710661/m1/4/:
accessed April 19, 2024),
University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu;
crediting UNT Libraries Government Documents Department.
