Catalogue GéoSAS
Eel abundance (IAA) - Sélune Observatory
The re-establishment of the river continuum on the Sélune after the dams have been levelled will enable colonization of the upper reaches of the basin, which were previously inaccessible to eels. Before the dams were levelled, two main tributaries were used by amphihaline fish for reproduction, in addition to the main river: the Beuvron and the Oir. The eel population of the Sélune was monitored in the pre-flushing phase by abundance index campaigns carried out in 2013, 2015, 2019 on a network of stations covering the entire Sélune hydrographic network. Since 2021, this network of stations has evolved to monitor changes in the part of the watershed accessible following the dismantling of the 2 dams. These data enable us to estimate changes in eel abundance along the Sélune and its tributaries, as well as their size structure before and after the removal of the dams.
The inventory is carried out in early September, every other year between 2013 and 2019, then every year since, using an electric fishing device and dip nets. Thirty thirty-second fishing stations are set up. A fishing station comprises approximately 100 meters of river. All eels caught are anaesthetized and biometric measurements are taken (weight, length, horizontal and vertical eye diameter, determination of yellow or silver stage). All eels are released directly at the fishing site.
This layer provides station abundances by fishing session.
Simple
- Date ( Publication )
- 2021-04-29T00:00:00
- Edition
- 2024
- Identifier
- fr-18007003900276-umrsas-selune-v_bioc_iaa_ab_iaa
- Purpose
- The purpose of this data is to estimate changes in eel abundance as part of the Sélune Observatory.
- Status
- Completed
- Maintenance and update frequency
- As needed
- Keywords ( Theme )
-
- Données ouvertes
- Keywords ( Theme )
-
- Limite
- INSPIRE themes INSPIRE themes ( Theme )
-
- Installations de suivi environnemental
- Use limitation
- Usage libre sous réserve des mentions obligatoires sur tout document de diffusion : "Source : INRAE - U3E"
- Use limitation
- Licence ouverte : https://www.etalab.gouv.fr/licence-ouverte-open-licence
- Access constraints
- Other restrictions
- Use constraints
- License
- Other constraints
- Pas de restriction d’accès public
- Spatial representation type
- Vector
- Denominator
- 25000
- Metadata language
- fre
- Topic category
-
- Environment
))
- Begin date
- 2013-09-02
- 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_iaa_ab_iaa
(
OGC:WMS
)
Visualiser "Abondances en anguilles (IAA) - Observatoire Sélune"
- OnLine resource
-
Télécharger "Abondances en anguilles (IAA) - Observatoire Sélune" au format Shapefile
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WWW:DOWNLOAD-1.0-http--download
)
Télécharger "Abondances en anguilles (IAA) - Observatoire Sélune" au format Shapefile
- OnLine resource
- Observatoire Sélune ( WWW:LINK-1.0-http--link )
- OnLine resource
-
Télécharger "Abondances en anguilles (IAA) - Observatoire Sélune" au format CSV
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WWW:DOWNLOAD-1.0-http--download
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Télécharger "Abondances en anguilles (IAA) - Observatoire Sélune" au format CSV
- Hierarchy level
- Dataset
Conformance result
- Date ( Publication )
- 2013-12-10
- Explanation
- Non Evalué
- Pass
- No
- Statement
- Les données d'abondances sont obtenues par agrégation des données de prélèvements d'individus.
- Feature catalogue citation
- Feature catalogue citation
gmd:MD_Metadata
- File identifier
- 905316e3-3fda-4446-b797-5f180dc67398 XML
- Metadata language
- fre
- Character set
- UTF8
- Parent identifier
- Sélune scientific program 32b2d23e-0f67-46fb-ad72-110514f1c8ee
- Hierarchy level
- Dataset
- Date stamp
- 2025-04-22T11:47:39
- Metadata standard name
- ISO 19115
- Metadata standard version
- 1.0
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