f10407e8-e66a-4c11-aa3c-44607b4e7c49 https://ipt.gbif.fr/resource?r=inrae_scorff_ial Nicolas Jeannot INRAE U3E, Pôle MIAME OFB-INRAE-L'institut Agro-UPPA pour la gestion des migrateurs amphihalins dans leur environnement Engineer

Moulin des Princes Pont-Scorff 56620 FR

+33 297325429 Nicolas.jeannot@inrae.fr Didier Azam INRAE, Pole OFB-INRAE-Agrocampus Ouest-UPPA pour la gestion des migrateurs amphihalins dans leur environnement, U3E, F-35042, Rennes, France. Engineer

65 rue de St Brieuc, CS 84215 Rennes 35042 FR

+33 223485786 Didier.Azam@inrae.fr Yoann Guilloux FDPPMA56 Technician

Moulin des Princes Pont-Scorff FR

+33 297325429 yoannguilloux.mdp.fedepeche@orange.fr Etienne Prévost INRAE ECOBIOP, Pôle MIAME OFB-INRAE-Agrocampus Ouest-UPPA pour la gestion des migrateurs amphihalins dans leur environnement Researcher

Aquapôle - Ibarron St-Pée-sur-Nivelle 64310

+33559515984 Etienne.Prevost@inrae.fr Nicolas Jeannot INRAE U3E, Pôle MIAME OFB-INRAE-L'institut Agro-UPPA pour la gestion des migrateurs amphihalins dans leur environnement Technician

Moulin des Princes Pont-Scorff 35042 FR

+33 297325429 nicolas.jeannot@inrae.fr Nadine Herrard INRAE, Pole OFB-INRAE-Agrocampus Ouest-UPPA pour la gestion des migrateurs amphihalins dans leur environnement, U3E, F-35042, Rennes, France. Researcher

65 rue de St Brieuc, CS 84215 Rennes 35042 FR

+33 223485786 Nadine.Herrard@inrae.fr programmer GBIF France GBIF France IT support

MNHN Geologie CP48, 43 rue Buffon Paris 75005 FR

+33143798065 connexion@gbif.fr http://www.gbif.fr distributor 2026-03-17 eng A survey started in 2012 is conducted every year in autumn to quantify the abundance of juvenile lamprey in the Scorff river in Britanny. This method uses a rectangular dredge to sample a constant and small surface of sediments in soft substrate areas. It targets all lamprey species. The data consist of abundance indices and biological traits measured on the fish sampled:length and 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 heritage species. Occurrence GBIF Dataset Type Vocabulary: http://rs.gbif.org/vocabulary/gbif/dataset_type.xml Observation GBIF Dataset Subtype Vocabulary: http://rs.gbif.org/vocabulary/gbif/dataset_subtype.xml Population density population distribution catch effort lamprey AGROVOC Occurrence GBIF Dataset Type Vocabulary: http://rs.gbif.org/vocabulary/gbif/dataset_type_2015-07-10.xml This data set is intended to be updated annually This work is licensed under a Creative Commons Attribution (CC-BY) 4.0 License. https://www6.inra.fr/diapfc https://ipt.gbif.fr/archive.do?r=inrae_scorff_ial The Scorff river in Britanny (France). http://services.sandre.eaufrance.fr/Courdo/Fiche/client/fiche_courdo.php?CdSandre=J5--0220 -3.34 -3.25 48.17 47.77 2012-06-01 2025-10-02 species Lampetra planeri Lamproie de planer species Petromyzon marinus Lamproie marine Monitoring of juvenile recruitment in lamprey on the Scorff river annually Frédéric Marchand INRAE, Pole OFB-INRAE-Agrocampus Ouest-UPPA pour la gestion des migrateurs amphihalins dans leur environnement, U3E, F-35042, Rennes, France. Engineer

65 rue de St Brieuc, CS 84215 Rennes 35042 FR

+33 223485786 frederic.marchand@inrae.fr From Lasne 2019 : The method is derived from Surber stream bottom sampler for. The frame is pushed into the substrate (maximum 15 cm deep, depending on soft substrate layer thickness) and the operator uses hands, protected by gloves, to gently dredge the substrate into the net until the substratum is removed. Thereafter, remaining sediments and larvae are dipnetted and transferred into a large sieve (1 mm mesh, about 0.4–0.5 m2). For better efficiency, the dipnet should be almost as wide as the bottom sampler. The net of the bottom sampler is removed and the dredged sediment is transferred into the sieve to be cleaned out and to sort out the larvae. 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 fork of the caudal fin (1 millimeter precision). Fish are then weighed (0.2 g precision) and maturity status is assessed by a gentle pressure on the belly that allows to get sperm in mature males. All the fish sampled are then released in their original site. Scorff river, CdSandre=J5--0220 Latitude between 47.7718 and 48.1682; longitude between -3.2497 and -3.3404 Source latitude and longitude : 48.14 -3.283 Last confluence point latitude and longitude : 47.7371 -3.3474 The Scorff river is a small coastal stream of Southern Brittany (France). The main river is 78,6 Km long including 15 km of estuary. The mean gradient is 3,6%, the annual mean discharge is 5 m3 s- and the drainage basin area is 480 km2. Human activities and land use are mainly from agriculture, with some areas made moors and forests. Atlantic salmon colonization is essentially restricted to the main river over a 50 km stretch starting at the head of tide. Reproduction of Atlantic salmon takes place mostly in the main river (Bagliniere et al., 1979).The Scorff has only three larger tributaries. Up to recent years, their colonization by Atlantic salmon was restricted their down-stream end due to mill-dams. In the Scorff, sampling is conducted at 2 sites spread along the mainstream. The sites are visited once a year in autumn (end of August to early September). Etienne Prévost principalInvestigator 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 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. - INRAE : French National Institute for Agricultural, Food en Environment Research - OFB : French Office for Biodiversity 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 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. 2021-03-24T16:38:41.242+00:00 dataset Lasne, E., M.-R. Sabatié, J. Tremblay, L. Beaulaton, et J.-M. Roussel. « A new sampling technique for larval lamprey population assessment in small river catchments ». Fisheries Research 106, nᵒ 1 (octobre 2010): 22‑26. https://doi.org/10.1016/j.fishres.2010.06.011. https://colisa.fr/ Colisa - Collection of Ichtyological Samples dried noTreatment f10407e8-e66a-4c11-aa3c-44607b4e7c49/v1.5.xml