A summary of the use of electronic tagging to provide insights into salmon migration and survival

The status of Pacific salmon populations has been of increasing concern for many decades, with many populations now under legal protection. The causes of their declining status are manifold and untangling
them has been difficult due to the complex life histories, which involve migrations among freshwater, estuarine, and marine habitats. Finding solutions to salmon management problems requires understanding
how salmon respond to threats in these different environments. Telemetry provides an attractive approach
to monitoring salmon as they move among these environments, and advances in miniaturization and mass production have made it feasible to monitor salmon throughout their life cycle.