Catalogue GéoSAS
Atlantic salmons catches - Selune Observatory
The opening of the dams should impact the functioning of Atlantic salmon populations migrating up the Sélune River and its tributaries. Restoring the river's ecological continuity will alter population flows by allowing amphihaline sea trout to migrate further upstream and native trout to move downstream and upstream of the dams. The trout population is monitored at a network of stations covering the entire Sélune basin using an abundance index, which is carried out every two years before 2021 and every year 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 FDAAPPMA35).
This dataset provides individual biometric data on Atlantic salmon caught during PAS fishing sessions in the Sélune watershed, by station and by fishing session.
Simple
- Date ( Publication )
- 2026-01-21T00:00:00
- Edition
- Mise à jour 2025
- Identifier
- fr-18007003900276-umrsas-selune-v_bioc_iat_ind_ias
- Purpose
- The purpose of this data is to provide an understanding of the variability among Atlantic salmon caught as part of the Sélune observatory.
- Status
- Completed
- Maintenance and update frequency
- As needed
- Keywords ( Place )
-
- Open data
- atlantic salmon
- capture data
- Dam removal
- Keywords ( Place )
-
- France
- Normandy
- Selune river
- Thésaurus INRAE Thésaurus INRAE ( Theme )
-
- poisson migrateur amphihalin
- salmon
- dam
- capture par unité d'effort
- Use limitation
- Unrestricted use subject to the following compulsory wording on all distribution documents: "Source: INRAE - DECOD - U3E".
- Use limitation
- Open license: https://www.etalab.gouv.fr/licence-ouverte-open-licence
- Access constraints
- Other restrictions
- Use constraints
- License
- Other constraints
- No public access restrictions
- 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_ind_ias
(
OGC:WMS
)
Captures de saumons atlantiques (IAS) - Observatoire Sélune
- OnLine resource
- Observatoire Sélune ( WWW:LINK-1.0-http--link )
- OnLine resource
- Sélune aquatic biocenoses observatory - 2023 activity report ( WWW:LINK-1.0-http--link )
- OnLine resource
- Observatoire des biocénoses aquatiques de la Sélune - 2022 activity report ( WWW:LINK-1.0-http--link )
- OnLine resource
- Activity report on the Sélune aquatic biocenoses observatory 2019-2021 ( WWW:LINK-1.0-http--link )
- OnLine resource
- Dispersion and (re)colonization of the Sélune and its tributaries ( WWW:LINK-1.0-http--link )
- OnLine resource
- 2024 activity report for the Sélune aquatic biocenoses observatory ( WWW:LINK-1.0-http--link )
- OnLine resource
-
atlantic salmons catches (SAI) - Observatoire Sélune
(
WWW:DOWNLOAD-1.0-http--download
)
Download "Atlantic salmon catches (SAI) - Observatoire Sélune" in CSV format
- OnLine resource
- Salmon abundance index (SAI) ( WWW:LINK-1.0-http--link )
- OnLine resource
-
Atlantic salmon catches (IAS) - Sélune Observatory
(
WWW:DOWNLOAD-1.0-http--download
)
Download "Atlantic salmon catches (IAS) - Sélune Observatory" in Shapefile format
- 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 objective of this monitoring is:
- to estimate the recruitment level in 0+ and 1+, the evolution of cohorts, abundances and densities of Atlantic salmon (Salmo salar);
- monitor biometrics (measurements, scale sampling and scalimetric readings) at reference stations;
- study intra- and inter-population genetic structure and the impact of individuals migrating downstream and upstream of dams on the entire population (fin sampling).
Sampling has been carried out annually since 2022 and biannually prior to 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
- 39a90983-5415-4e6b-8430-d1629bab235c XML
- Metadata language
- fre
- Character set
- UTF8
- Parent identifier
- Sélune biotic and abiotic observatory e91b4cb1-252d-4ae9-bdf4-24366af7a87c
- Hierarchy level
- Dataset
- Date stamp
- 2026-02-18T15:02:10
- Metadata standard name
- ISO 19115
- Metadata standard version
- 1.0
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