Catalogue GéoSAS
Brown trout Study Areas (Ponctual Abundance Sampling PAS) by session - Sélune Observatory
The opening of the dams will have a considerable impact on the functioning of trout populations in the Sélune. Restoring the river's ecological continuity will modify population flows, allowing amphihaline sea trout to migrate further upstream, and native trout to move upstream and downstream of the dams. The trout population is monitored at a network of stations covering the entire Sélune basin, using an abundance index carried out every 2 years.
Field campaigns follow the Vigitruite® fishing protocol, developed at INRAE for use throughout France. This index of abundance, related to the surface area of favorable habitats on the watercourse, makes it possible to evaluate the quantity of trout present in the river, resulting from natural reproduction in previous years. Field campaigns are carried out by INRAE and the Fédération d'Ille-et-Vilaine pour la Pêche et la Protection du Milieu Aquatique (FDAAPPMA35).
This layer shows the locations of these study sectors by year of study : 2012, 2014, 2018, 2020, 2022, 2023, 2024 et 2025.
Simple
- Date ( Publication )
- 2023-01-23T00:00:00
- Date ( Revision )
- 2025-07-31
- Edition
- Mise à jour 2025
- Edition date
- 2025-07-31
- Identifier
- fr-18007003900276-umrsas-selune-sctr_IAT_selune
- Purpose
- The purpose of this data is to locate where trout catches were made as part of the Sélune observatory.
- Status
- Completed
- Maintenance and update frequency
- As needed
- Keywords ( Theme )
-
- Données ouvertes
- Keywords ( Theme )
-
- Limite
- Thésaurus INRAE Thésaurus INRAE ( Theme )
-
- poisson migrateur amphihalin
- trout
- abundance index
- dam
- Use limitation
- Unrestricted use subject to the following compulsory wording on all distribution documents: "Source: INRAE - DECOD - 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
- Metadata 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
Distributor
- Name
- ESRI Shapefile
- Version
- 1.0
- OnLine resource
-
v_bioc_iat_sctr_iat_sessions
(
OGC:WMS
)
Secteurs d'étude des truites fario (IAT) par session - Observatoire Sélune
- OnLine resource
-
(
WWW:DOWNLOAD-1.0-http--download
)
Download "Brown trout Study Areas (IAT) by session - Sélune Observatory" in shapefile
- OnLine resource
- Observatoire Sélune ( WWW:LINK-1.0-http--link )
- OnLine resource
- Partie D – Livrets de protocoles de pêche à l’électricité : VIGITRUITE ® , indice d'abondance truite (IAT) ( WWW:LINK-1.0-http--link )
- OnLine resource
- Rapport d'activités 2024 de l'Observatoire des biocénoses aquatiques de la Sélune ( WWW:LINK-1.0-http--link )
- OnLine resource
- Dispersion et (re)colonisation du cours de la Sélune et de ses affluents ( WWW:LINK-1.0-http--link )
- OnLine resource
- Rapport d'activité Observatoire des biocénoses aquatiques de la Sélune 2019-2021 ( WWW:LINK-1.0-http--link )
- OnLine resource
- Observatoire des biocénoses aquatiques de la Sélune - rapport d'activités 2022 ( WWW:LINK-1.0-http--link )
- OnLine resource
- Observatoire des biocénoses aquatiques de la Sélune - rapport d’activités 2023 ( WWW:LINK-1.0-http--link )
- OnLine resource
-
Télécharger "Secteurs d'étude des truites (IAT) par session - Observatoire Sélune" au format CSV
(
WWW:DOWNLOAD-1.0-http--download
)
Télécharger "Secteurs d'étude des truites (IAT) par session - Observatoire Sélune" au format CSV
- OnLine resource
- Partie D – Livrets de protocoles de pêche à l’électricité : VIGITRUITE ® , indice d'abondance truite (IAT) ( WWW:LINK-1.0-http--link )
- Hierarchy level
- Dataset
Conformance result
- Date ( Publication )
- 2013-12-10
- Explanation
- Non Evalué
- Pass
- No
- 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+, 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 “Trout Abundance Index by Electrofishing” protocol according to the Vigitruite® protocol (Roussel et al. 2023).
The stations (also called study areas) were located using a hiking GPS (expected planimetric accuracy <= 20 m).
- Feature catalogue citation
gmd:MD_Metadata
- File identifier
- 76add27e-1848-4a70-927b-ed098e39de21 XML
- Metadata language
- fre
- Character set
- UTF8
- Parent identifier
- Sélune biotic and abiotic observatory e91b4cb1-252d-4ae9-bdf4-24366af7a87c
- Hierarchy level
- Dataset
- Date stamp
- 2026-02-06T15:39:33
- Metadata standard name
- ISO 19115
- Metadata standard version
- 1.0
Overviews
Provided by
