Abstract
Abstract Information on movement patterns and behaviors of Pacific lampreys Lampetra tridentata at Columbia River hydroelectric projects is needed to determine effects of the dams on survival. Radiotelemetry provides a good method for gaining knowledge about Pacific lamprey behavior at the dams; however, one of the assumptions of a radiotelemetry experiment is that tagged individuals are representative of untagged individuals. Therefore, we undertook an assessment of the swimming performance and physiological effects of surgical implantation of radio transmitters into the peritoneal cavities of Pacific lamprey. We measured concentrations of plasma glucose, ventilation rate, and swimming performance at short-term and long-term intervals following the surgical implantation of radio transmitters in Pacific lamprey. We found no short-term difference in glucose levels between tagged (3.4-g tags) and control lampreys, suggesting tagging is no more stressful than handling. Plasma levels of glucose in Pacific lam...
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