GeoDataINRAE
Brown trouts abundance (IAT) - Observatoire Sélune
The re-establishment of the river continuum of the Sélune after the levelling of the dams will enable the colonization of the upstream part of the basin which was previously inaccessible to trout.
As a result, monitoring of amphihaline fish populations on the Sélune is carried out on the main river and its tributaries, both upstream and downstream of the former dams. These enable us to understand the dynamics of these common trout populations before, during and after dam removal.
Regarding the trouts, the inventory is carried out using the VIGITRUITE® protocol.
This is a standardized protocol for estimating the abundance of juvenile trout (Salmo trutta) in rivers. It is based on sampling per unit effort, a unit fixed at 5 minutes of effective fishing, and thus delivers abundances in numbers of juveniles per 5 minutes. Abacuses for converting abundances into densities are available, and a guide to interpreting densities, from low to excellent, is proposed. Compared with traditional inventories, this protocol enables a smaller number of people to be mobilized in the field. The protocol applies to watercourses up to 8 m wide and never more than 60 cm deep.
It has been validated on granite and limestone rivers in Brittany and Normandy.
VIGITRUITE® specifically targets juveniles of the year (0+) and yearlings (1+). The 0+ abundance
provides information on generation replacement (or recruitment), useful for population demographic monitoring.
The abundance of 0+ and 1+ is also a reflection of the quality of the trutticole habitat, and of specific attacks on its
integrity (pollution, sedimentation, fragmentation in particular). It is a diagnostic tool for trout populations
and their river habitats.
This protocol is applied in September of the years in question: every 2 years between 2012 and 2020, then every year from 2021 to 2027.
The year 2020 is special because of the COVID.
For more information on acquisition conditions, please refer to the Sélune biocenosis observatory reports, the links to which are provided in this document.
This dataset provides juvenile trout abundance data (0+, 1+ and cumulative), by station and fishing session.
Simple
- Date (Publication)
- 2025-08-05T00:00:00
- Edition
-
2024
- Citation identifier
- fr-18007003900276-umrsas-selune-v_bioc_iat_ab_iat
- Purpose
-
The purpose of this data is to estimate changes in juveile trout abundance 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
Point of contact INRAE U3E
Frédéric Marchand
Point of contact AESN
funder
- Maintenance and update frequency
- Annually
- Theme
-
-
Open data
-
- Theme
-
-
Limite
-
-
INSPIRE themes
-
-
Installations de suivi environnemental
-
- Use limitation
-
Unrestricted use subject to the following compulsory wording on all distribution documents: "Source: INRAE - 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
- Language
-
fre
- Topic category
-
- Environment
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- Begin date
- 2012-09-02
- End date
- 2027-12-31
- Reference system identifier
- RGF93 / Lambert-93 (EPSG:2154)
- Geometric object type
- Point
Distributor
- Distributor contact
-
Organisation name Individual name Electronic mail address Role UMR 1069 SAS INRA - Agrocampus Ouest
Pole GéoSAS
Distributor
- Distributor format
-
Name Version ESRI Shapefile
1.0
Digital transfer options
- OnLine resource
-
Protocol Linkage Name OGC:WMS
https://geosas.fr/geoserver/selune/wms?SERVICE=WMS&REQUEST=GetCapabilities v_bioc_iat_ab_iat
WWW:DOWNLOAD-1.0-http--download
https://geosas.fr/geoserver/wfs?service=WFS&version=2.0.0&request=GetFeature&typeName=selune:v_bioc_iat_ab_iat&outputFormat=SHAPE-ZIP Trout abundance (IAT) - Observatoire Sélune
WWW:LINK-1.0-http--link
https://programme-selune.com/observatoire-selune Observatoire Sélune
WWW:DOWNLOAD-1.0-http--download
https://geosas.fr/geoserver/wfs?service=WFS&version=2.0.0&request=GetFeature&typeName=selune:v_bioc_iat_ab_iat&outputFormat=CSV Trout abundance (IAT) - Observatoire Sélune
WWW:LINK-1.0-http--link
https://hal.inrae.fr/hal-05167013 2024 activity report for the Sélune aquatic biocenoses observatory
WWW:LINK-1.0-http--link
https://hal.inrae.fr/SELUNE/hal-03357109v1 Dispersion and (re)colonization of the Sélune and its tributaries
WWW:LINK-1.0-http--link
https://hal.inrae.fr/hal-04839910v1 Activity report on the Sélune aquatic biocenoses observatory 2019-2021
WWW:LINK-1.0-http--link
https://hal.inrae.fr/hal-04839973v1 Observatoire des biocénoses aquatiques de la Sélune - 2022 activity report
WWW:LINK-1.0-http--link
https://hal.inrae.fr/hal-04840030v1 Sélune aquatic biocenoses observatory - 2023 activity report
WWW:LINK-1.0-http--link
https://hal.inrae.fr/hal-03757525v1 Partie D – Livrets de protocoles de pêche à l’électricité : VIGITRUITE ® , indice d'abondance truite (IAT)
- Hierarchy level
- Dataset
Conformance result
- Title
-
INSPIRE Data Specification for the spatial data theme Elevation
- Date (Publication)
- 2013-12-10
- Explanation
-
Non évalué
- Pass
- No
- Statement
-
Abundance data are obtained by aggregating data from individual samples.
Metadata
- File identifier
- a30cd50b-68a8-4d72-94db-95ae91c88a08 XML
- Metadata language
-
fre
- Character set
- UTF8
- Hierarchy level
- Dataset
- Date stamp
- 2025-11-06T16:19:34
- 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
Point of contact
- Other language
-
Language Character encoding English French UTF8
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