Monitoring of fish stocks in the river Bresle

IA SAT "Salmon" Abundance Indices

These indices (number of juveniles caught per 5 minutes of fishing) (Prévost et al 1993), compiled by Seinormigr, are generally recorded in late September at nine stations distributed along the main course of the river.

Voir : Salmon juvenils

IAT (VIGITRUITE®) Trout Abundance Indices

IAT surveys are generally carried out in late September using the ‘Vigitruite®’ methodology (Roussel 2004). The sampling points were distributed across the Bresle river system.

Voir : Trout juvenils

IAA eel stock

The IAA surveys are carried out in September–October, in partnership with Seinormigr, using the method developed by Lafaille et al., 2005. The 15 stations spread along the entire length of the river provide a representative picture of eel densities in the Bresle.

Voir : Stock Eel

Eels and salmon

Survey fishing targeting salmon and eels has been carried out in September–October since 2016. This is preceded by a pilot survey, in accordance with the protocol adapted to the target species, and is intended to assess the effectiveness of the pilot surveys in relation to the densities observed at the site.