Date (Publication)

2025-09-29T00:00:00

Edition

Mise à jour 2024

Edition date

2025-09-29

Citation identifier

fr-18007003900276-umrsas-selune-sctr_IAS_selune

Purpose

The purpose of this data is to locate where salmons catches were made as part of the Sélune observatory.

Status

Completed

Point of contact

Organisation name	Individual name	Electronic mail address	Role
INRAE UMR DECOD	Jean-Marc Roussel	jean-marc.roussel@inrae.fr	Point of contact
INRAE U3E	Frédéric Marchand	frederic.marchand@inrae.fr	Point of contact

Maintenance and update frequency

As needed

Theme

• Open data

• atlantic salmon

• Dam removal

• fishing area

Place

• Selune river

• France

• Normandy

Thésaurus INRAE

• poisson migrateur amphihalin

• dam

Use limitation

Unrestricted use subject to the following compulsory wording on all distribution documents: "Source: INRAE - U3E".

Use limitation

Open licence : https://www.etalab.gouv.fr/licence-ouverte-open-licence

Access constraints

Other restrictions

Use constraints

License

Other constraints

No public access restriction

Spatial representation type

Vector

Denominator

25000

Language

fre

Topic category

• Environment

Begin date

2012-09-02

End date

2027-12-31

Reference system identifier

RGF93 / Lambert-93 (EPSG:2154)

Geometric object type

Point

Hierarchy level

Dataset

Statement

Monitoring of amphihaline fish populations in the Sélune is carried out on the main river and its tributaries, both upstream and downstream of the old dams. This allows us to understand the dynamics of these populations before, during, and after the dams are demolished. Brown trout, Atlantic salmon, European eel, and lampreys (marine, river, and Planer) are species of high conservation importance. The populations are monitored using various inventory protocols (electrofishing, trapping, DNAe) supplemented by sampling aimed at better characterizing the populations (genetics, scalimetry).

The objectives of this monitoring are:

- to estimate the level of recruitment in 0+ and 1+, the evolution of cohorts, and the abundance and density of trout (Salmo trutta);

- to monitor biometrics (measurements, scale sampling, and scalimetry) at reference stations;

- to study intra- and inter-population genetic structure and the impact of migratory individuals and the movement of sedentary trout downstream and upstream of dams on the entire population (fin sampling).

Sampling has been annual since 2022 and biannual before that.

The protocol implemented is the “Gaétan Pottier, Frédéric Marchand, Sabrina Servant, Etienne Prévost. Indice d’abondance saumon

(IAS). Collection Guides et Protocoles. La pêche scientifique à l’électricité dans les milieux aquatiques

continentaux, INRAE; OFB, 2022. ffhal-03757386".

The stations (also called study areas) were located using a hiking GPS (expected planimetric accuracy <= 20 m).

Metadata

File identifier

8cfe4621-91cf-45c4-b5c1-63903b88c21d XML

Metadata language

fre

Character set

UTF8

Parent identifier

e91b4cb1-252d-4ae9-bdf4-24366af7a87c

Hierarchy level

Dataset

Date stamp

2026-01-22T15:47:47

Metadata standard name

ISO 19115

Metadata standard version

1.0

Metadata author

Organisation name	Individual name	Electronic mail address	Role
UMR 1069 SAS INRA - Agrocampus Ouest	GéoSAS	geosas_adm@framalistes.org	Point of contact

Other language

Language	Character encoding
English
French	UTF8