Monitoring fish stocks in Scorff River

Monitoring fish stocks in Scorff River

On the Scorff River, in addition to the monitoring carried out at the trapping stations, various fish population monitoring operations are conducted throughout the river system.

The data from these various monitoring programmes are available in the annual report.

Tacon

"Salmon" abundance indices (IA SAT)

These indicators (number of juveniles caught per five minutes of fishing) (Prévost et al 1993) have generally been carried out in late September since 1993

See : Juvenils salmon

 
Truite juvénile

Juvenils trout

Since 2007, IAT have generally been carried out in late September using the "Vigitruite®" method (Roussel 2004)

 
lamproies

Juvenils lampreys

Abondances' lamprey indicators (Lasne 2010) have been compiled in the autumn since 2013

 
Frayére saumon

Counting of spawning grounds

These spawning ground couting (for salmon and/or lamprey) have been carried out since 2007