Month: October 2019

Posted on

River Minho – 2019

Study type: Radio
Listening stations deployed: 2
(complemented with manual tracking)
Tagged smolts: 35 (25 wild & 10 naturalised*)
Succeeded: 17 (12 wild & 5 naturalised*)

* Naturalised fish were born in a hatchery environment but were released to the upper reaches of the river as young juveniles.

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

Posted on

River Bush – 2019

Study type: Radio
Listening stations deployed: 1
(complemented with manual tracking)
Tagged smolts: 35
Succeeded: 24

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

Posted on

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