Catalogue GéoSAS
Atlantic salmons study Areas (Ponctual Abundance Sampling PAS) by session - Sélune Observatory
The opening of the dams should impact the functioning of Atlantic salmon populations migrating up the Sélune and its tributaries. Restoring the river's ecological continuity will alter population flows by allowing Atlantic salmon to migrate further upstream and downstream of the dams. The Atlantic salmon population is monitored at a network of stations covering the entire Sélune basin using an abundance index, which was carried out every two years before 2021 and annually since then.
Field campaigns comply with the fishing protocol developed by INRAE and OFB. The aim of this method is to estimate the abundance of juvenile Atlantic salmon (Salmo salar) at a station (or sector). This protocol targets juveniles of the year (aged 0+) whose abundance reflects the renewal of generations within the population (or recruitment) and survival after the embryonic development phases under gravel and the first months of life in the open environment. Field campaigns are carried out by INRAE and the Manche d'Ille-et-Vilaine Federation for Fishing and the Protection of the Aquatic Environment (FDAPPMA50 and FDAPPMA35).
This dataset provides the locations of these study sectors for IAS fishing sessions in the Sélune watershed by fishing session.
Simple
- Date ( Publication )
- 2025-09-29T00:00:00
- Edition
- Mise à jour 2024
- Edition date
- 2025-09-29
- Identifier
- fr-18007003900276-umrsas-selune-sctr_IAS_selune
- Purpose
- The purpose of this data is to locate where atlantic salmons catches were made as part of the salmaon PAS (Ponctual Abundance Sampling) protocol dans the Sélune observatory.
- Status
- Completed
- Maintenance and update frequency
- As needed
- Keywords ( Place )
-
- Open data
- atlantic salmon
- Dam removal
- fishing area
- Keywords
-
- Selune river
- France
- Normandy
- Thésaurus INRAE Thésaurus INRAE ( Theme )
-
- salmon
- dam
- abundance index
- poisson migrateur amphihalin
- 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_ias_sctr_ias_sessions
(
OGC:WMS
)
Secteurs d'étude des saumons atlantiques (IAS) par session - Observatoire Sélune
- OnLine resource
-
Download "Brown trout Study Areas (IAT) by session - Sélune Observatory" in shapefile
(
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
- 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 saumons atlantiques (IAS) par session - Observatoire Sélune" au format CSV
(
WWW:DOWNLOAD-1.0-http--download
)
Télécharger "Secteurs d'étude des saumons atlantiques (IAS) par session - Observatoire Sélune" au format CSV
- OnLine resource
- Salmon abundance index (SAI) ( 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 )
- 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 course 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 were demolished. Brown trout, Atlantic salmon, European eel and lamprey (marine, river and brook) are species of high conservation importance. Populations are monitored using various inventory protocols (electrofishing, trapping, DNAe) supplemented by sampling to better characterise the populations (genetics, scalimetry).
The objectives of this monitoring programme are:
- to estimate recruitment levels in 0+ and 1+, cohort development, abundance and density of Atlantic salmon (Salmo salar);
- to monitor biometrics (measurements, scale sampling and scalimetric readings) 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 protocol "Gaétan Pottier, Frédéric Marchand, Sabrina Servant, Etienne Prévost. Salmon abundance index (IAS). Guides and Protocols Collection. Scientific electrofishing in continental aquatic environments,
INRAE; OFB, 2022. ffhal-03757386".
The stations (also known as study sectors) were located using a hiking GPS (expected planimetric accuracy <= 20 m).
- Feature catalogue citation
gmd:MD_Metadata
- File identifier
- 8cfe4621-91cf-45c4-b5c1-63903b88c21d XML
- Metadata language
- fre
- Character set
- UTF8
- Parent identifier
- Sélune biotic and abiotic observatory e91b4cb1-252d-4ae9-bdf4-24366af7a87c
- Hierarchy level
- Dataset
- Date stamp
- 2026-02-18T14:42:33
- Metadata standard name
- ISO 19115
- Metadata standard version
- 1.0
Overviews
Provided by
