More than a decline: 20 years of Atlantic Salmon Monitoring on the River Tamar
Photo credit: Kate Allen
Returning Stock Estimate (RSE)
• Annual estimate of adult fish entering freshwater environment
• Combination of trap and counter data
• ‘Hands-on’ approach allows for other data to be collected
Fish counter
Fish trap
Returning Stock Estimate (RSE)
Changes in Stock Composition
Changes in Stock Compositon
• Fecundity?
• Strength in migration?
• Long term impacts?
• Why the shift?
Migration Timing
Migration Timing
Movement Timing
Marine Survival Estimates
Micro tagging (CWD)
Fin clips for ID and DNA
Scale samples for aging and DNA
Marine Survival Estimates
Fulton’s Body Condition
Fish Health
• Red skin Disease
• Red Vent Syndrome
• Sea lice loading
• Saprolegnia
• Novel diseases and pathogens
• Predator damage
Juvenile Monitoring
Juvenile Monitoring
