River Erriff – 2019

Acoustic Study

Study type: Acoustic
Listening stations deployed: 13
Tagged smolts: 20
Succeeded: 16

Survival rates (%) 
Overall survival = Number of survivors / Total number of released fish * 100
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: 43
Succeeded: 20

Survival rates (%) 
Overall survival = Number of survivors / Total number of released fish * 100
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