Identification of larval pacific lampreys (Lampetra tridentata), river lampreys (L. ayresi) and western brook lampreys (L. richardsoni) and thermal requirements of early life history stages of lampreys : annual report 2000

摘要

Pacific lampreys (Lampetra tridentata) in the Columbia River Basin (CRB) are believed to have declined to only a remnant of their population prior to human development, and actions are currently being considered for their recovery (Close et al. 1995). Identifying biological factors that may limit lamprey production in the CRB is critical for their recovery, and while some biological information for this and sympatric species the western brook lamprey (L. richardsoni) and the river lamprey (L. ayresi) is available from studies in Canada (Pletcher 1963, Beamish 1980, Richards 1980, Beamish and Levings 1991), little is known about the biology of lampreys in the CRB.