River Erriff – 2018

Accoustic Study

Study type: Acoustic
Listening stations deployed: 13
Tagged smolts: 70 (35 wild & 35 hatchery)
Succeeded: 43 (17 wild & 26 hatchery)

Survival rates (%)
Overall survival = Number of survivors / Total number of released fish * 100 <br> Section survival = Fish that reached the end of the section / Fish that entered the section * 100

Study area
Red dots represent listening stations
Red flags represent release sites

Radio study

Study type: Radio
Listening stations deployed: 4
(complemented with manual tracking)
Tagged smolts: 30
Succeeded: 7

Survival rates (%)
Overall survival = Number of survivors / Total number of released fish * 100 <br> Section survival = Fish that reached the end of the section / Fish that entered the section * 100

Study area
Red dots represent listening stations
Red flags represent release sites