Descripción
A survey started in 2016 and is conducted every year in early autumn (September to early october) to quantify the abundance of european eel in the Bresle, Normandy. The electrofishing protocol of eel abundance indices (2022) is used. It targets juveniles of european eels, but older fish are also caught and included in this dataset. Sampling is restricted to areas with shallow running water. The data consist of abundance indices and biological traits measured on the fish sampled: length, weight. The survey is carried out under the Research Observatory on Diadromes Fishes in Coastal Streamss (ERO DiaPFC) program. The data are stored in the database of the ERO. They are used to develop predictive models and tools for providing scientific advice to improve the management of this species.
Registros
Los datos en este recurso de registros biológicos han sido publicados como Archivo Darwin Core(DwC-A), el cual es un formato estándar para compartir datos de biodiversidad como un conjunto de una o más tablas de datos. La tabla de datos del core contiene 339 registros.
también existen 1 tablas de datos de extensiones. Un registro en una extensión provee información adicional sobre un registro en el core. El número de registros en cada tabla de datos de la extensión se ilustra a continuación.
Este IPT archiva los datos y, por lo tanto, sirve como repositorio de datos. Los datos y los metadatos del recurso están disponibles para su descarga en la sección descargas. La tabla versiones enumera otras versiones del recurso que se han puesto a disposición del público y permite seguir los cambios realizados en el recurso a lo largo del tiempo.
Versiones
La siguiente tabla muestra sólo las versiones publicadas del recurso que son de acceso público.
¿Cómo referenciar?
Los usuarios deben citar este trabajo de la siguiente manera:
Josset Q., Flesselle A., Floquet A., Macquet T., Beaulaton and Marchand F. (2024). Abundances and biological traits of eels sampled in the survey of eels abundance Indices in the Bresle river (France)
Derechos
Los usuarios deben respetar los siguientes derechos de uso:
El publicador y propietario de los derechos de este trabajo es Institut national de recherche pour l’agriculture, l’alimentation et l’environnement (INRAE). Esta obra está bajo una licencia Creative Commons de Atribución/Reconocimiento (CC-BY 4.0).
Registro GBIF
Este recurso ha sido registrado en GBIF con el siguiente UUID: faa02037-fddd-4c62-9f28-2d0d0fee2468. Institut national de recherche pour l’agriculture, l’alimentation et l’environnement (INRAE) publica este recurso y está registrado en GBIF como un publicador de datos avalado por GBIF France.
Palabras clave
Population density; catch effort
Contactos
- Originador ●
- Punto De Contacto
- Engineer
- 92 Chaussée de Picardie
- +33 22 76 37 50 78
- Originador
- Technician
- 92 Chaussée de Picardie
- +33 22 76 37 50 78
- Originador
- Technician
- 92 Chaussée de Picardie
- Originador
- Technician
- 92 Chaussée de Picardie
- +33 22 76 37 50 78
- Originador
- Engineer
- 65 rue de Saint Brieuc
- Proveedor De Los Metadatos
- Engineer
- 65 rue de Saint Brieuc
- Programador
- Engineer
- 65 rue de St Brieuc, CS 84215
- +33223485786
Cobertura geográfica
The Bresle river in Normandy (France). http://www.sandre.eaufrance.fr/geo/CoursEau/G01-0400
| Coordenadas límite | Latitud Mínima Longitud Mínima [-90, -180], Latitud Máxima Longitud Máxima [90, 180] |
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Cobertura temporal
| Fecha Inicial / Fecha Final | 2016-10-03 / 2023-10-15 |
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Datos del proyecto
The Research Observatory on Diadromous Fish in Coastal Streams (ORE DiaPFC) is a research infrastructure steered by INRAE in partnership with OFB and part of the OFB-INRAE-L'Institut Agro-UPPA R&D center. It’s focused on the study of the evolution of diadromous fish populations under the influence human induced environmental changes that affect these rivers (mainly climate and effects of agriculture). Diadromous species of primary interest are salmon (Salmo salar), trout (Salmo trutta), eel (Anguilla Anguilla), shads (Alosa sp.), and lampreys (Lampetra sp. and Petromyzon marinus). These species are threatened by the consequences of human activities. They are flagship species for the biodiversity of coastal streams. Nowadays, these streams are the main refuges for diadromous fish that have disappeared or dramatically declined on larger rivers. This ERO DiaPFC is a Research Infrastructure based on four coastal streams of the Atlantic and Channel coast of France: the Bresle and the Oir in Normandy, the Scorff in Brittany and the Nivelle in the Pays Basque. These four rivers are equipped with diadromous fish trapping facilities and are thoroughly and continuously surveyed from the mid 1980s. They are twinned with experimental ecology facilities located in Rennes (Brittany) and Saint-Pée-sur-Nivelle (Pays Basque). This set of facilities is complemented by individual-based eco-genetic simulators for in silico experimentation on virtual populations.
| Título | ORE-DiaPFC Observatoire de Recherche en Environnement des poissons diadromes sur les Petits Fleuves Côtiers - ERO DiaPFC Ecological Research Observatory on Diadromous Fish in coastal streams |
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| Fuentes de Financiación | - INRAE : French National Institute for Agricultural, Food en Environment Research - OFB : French Office for Biodiversity. - Data collected on troutin the framework of the ORE DiaPFC have been included in the national program for the data collect in support of scientific advice for the Common Fisheries Policy for the European regulations on fisheries management. In this context, INRAE and OFB contribute to the National Work Program piloted by the DPMA of the Ministry of the Environment. This program is financially supported by FEAMP and FEAMPA |
| Descripción del área de estudio | ERO DiaPFC is a Research Infrastructure based on three coastal streams of the Atlantic and Channel coast of France: the Bresle and the Oir in Normandy, the Scorff in Brittany and the Nivelle in the Pays Basque |
| Descripción del diseño | The issue of Research Observatory on Diadromes Fish in Coastal Rivers (ORE DiaPFC) is to study the evolution of diadromous fish populations as a result of environmental changes (climate change and changes related to agriculture ) that affect these rivers. |
Métodos de muestreo
On the Bresle, sampling is conducted at 14 sites spread along the mainstem, in the area of the hydrographic network colonized by the European eel.
| Área de Estudio | The Bresle is a small coastal river that flows into the English Channel, in the commune of Le Tréport. 68.1 km separate in a straight line its source, in the commune of Abancourt in Oise (60) from its mouth. However, the particular hydrology of limestone substratum rivers, as well as the multiplication throughout the history of mills and other structures along its course, more than doubles the length of the actual watercourse. The river drains a watershed of nearly 748 km², composed mainly of a chalky substrate dating back to the upper Cretaceous. The basin has historically been marked by the glass industry, but also by the paper industry, as well as by gravel extraction. Agricultural practices that were once mainly focused on dairy farming and grazing are now shifting towards the production of maize, protein crops for livestock, and potatoes. Migratory salmonids can now reach the municipality of Saint-Germain-sur-Bresle, just over 50 km from the sea. |
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Descripción de la metodología paso a paso:
- Fish capture was carried out with a portable electrofishing equipment. The same gear was used since the beginning of the data collection, namely a Martin Pêcheur from DREAM Electronique, It is tuned to produce a pulsed DC with a 400 Hz frequency, 250-300 volts and a square-waveform between 4 and 10% duty cycle. Fishing is operated according to the following steps : 1. Two large dip-nets with metal frames are placed facing the current, lying on the bottom, and kept at a fixed position. In the case of a watercourse of reduced width, only one is used. 2. The anode scans an area about 2-2.5 m upstream of the dip-nets in the vein of water filtered by them. The electric current is applied for a duration of 30s, with a circuit cut after 15s and for a duration of 2s. 3. Fish attracted by the anode and shocked go down into the nets guided by the electrode and driven by the water flow. If necessary, the fish stuck on the bottom or in aquatic vegetation are recovered by a small hand net. The electric field is variable, adapted to the conductivity of the water. In the areas where there are many roots or stones, the operator may have to fish longer in order to attract the fish out of their hiding place. 4. Individuals are transferred into a bucket previously filled with water. 5. The whole team moves from bank to bank out of the area that has just been disturbed by the electric field, the carrier of the electrofishing gear taking care of not to step on the area he will next explore with the anode. When a bank is reached, the progression is a few meters upstream and the team goes the other way. 6. Biometric measurement of the fish are recorded after their anesthesia with benzocaïne. The fish length is measured from the tip of the mouth to the tip of the caudal fin (1 millimeter precision). Fish are then weighed (0.2 g precision). All the fish sampled are then released in their original site of capture.
Metadatos adicionales
This data set is intended to be updated annually.
| Identificadores alternativos | faa02037-fddd-4c62-9f28-2d0d0fee2468 |
|---|---|
| https://ipt.gbif.fr/resource?r=bresle-iaa |