Application of Acoustic and Archival Tags to Assess Estuarine, Nearshore, andOffshore Habitat Utilization and Movement by Salmonids

摘要

Salmonid stocks on the west coast are in trouble and concerns have been expressedby scientific, environmental, and fishing communities. Causes of population declines are complex; variations in freshwater flow, dams, habitat degradation, hatchery practices, climate variability, and ocean conditions may all play a role. The contribution of the estuary and ocean to variations in salmonid survival remains poorly known. Understanding this role and how it varies with changing environmental conditions will require improved knowledge of movements and habitat utilization during different life history stages. This volume is the report of a workshop organized in Seattle in September, 1996 to examine the means by which new tagging technologies, principally acoustic and archival tags, can contribute to our understanding of these questions.