Author: Sophie Pamerlon
Keywords: Occurrence, Observation, Population density, population distribution, catch effort, lamprey

Abundances and biological traits of the juveniles lamprey sampled in the survey of lamprey abundance Indice on the Scorff river (France)

Nicolas Jeannot^1, Didier Azam^2, Yoann Guilloux^3, Etienne Prévost^4, Nicolas Jeannot^5, Nadine Herrard^6, GBIF France^7

1 INRAE U3E, Pôle MIAME OFB-INRAE-L'institut Agro-UPPA pour la gestion des migrateurs amphihalins dans leur environnement, Moulin des Princes, 56620, Pont-Scorff, France; 2 INRAE, Pole OFB-INRAE-Agrocampus Ouest-UPPA pour la gestion des migrateurs amphihalins dans leur environnement, U3E, F-35042, Rennes, France., 65 rue de St Brieuc, CS 84215, 35042, Rennes, France; 3 FDPPMA56, Moulin des Princes, Pont-Scorff, France; 4 INRAE ECOBIOP, Pôle MIAME OFB-INRAE-Agrocampus Ouest-UPPA pour la gestion des migrateurs amphihalins dans leur environnement, Aquapôle - Ibarron, 64310, St-Pée-sur-Nivelle; 5 INRAE U3E, Pôle MIAME OFB-INRAE-L'institut Agro-UPPA pour la gestion des migrateurs amphihalins dans leur environnement, Moulin des Princes, 35042, Pont-Scorff, France; 6 INRAE, Pole OFB-INRAE-Agrocampus Ouest-UPPA pour la gestion des migrateurs amphihalins dans leur environnement, U3E, F-35042, Rennes, France., 65 rue de St Brieuc, CS 84215, 35042, Rennes, France; 7 GBIF France, MNHN Geologie CP48, 43 rue Buffon, 75005, Paris, France

Corresponding author(s): Nicolas Jeannot (Nicolas.jeannot@inrae.fr)Didier Azam (Didier.Azam@inrae.fr)Yoann Guilloux (yoannguilloux.mdp.fedepeche@orange.fr)Etienne Prévost (Etienne.Prevost@inrae.fr), Nicolas Jeannot (nicolas.jeannot@inrae.fr)

Received {date}; Revised {date}; Accepted {date}; Published {date}

Citation: Combination of authors, year of data paper publication (in parentheses), Title, Journal Name, Volume, Issue number (in parentheses), and doi of the data paper.

Abstract

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.

Keywords: Occurrence, Observation, Population density, population distribution, catch effort, lamprey

General description

Purpose: Monitoring of juvenile recruitment in lamprey on the Scorff river
Additional information: This data set is intended to be updated annually

Project details

Project title: Observatoire de Recherche en Environnement des poissons diadromes sur les Fleuves Côtiers - Ecological Research Observatory on Diadromous Fish in coastal streams
Personnel: Etienne Prévost
Funding: - INRAE : French National Institute for Agricultural, Food en Environment Research 
- OFB : French Office for Biodiversity
Study area descriptions/descriptor: 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
Design description: 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.

Data published through GBIF: http://ipt.gbif.fr/resource?r=inrae_scorff_ial

Taxonomic coverage

Taxonomic ranks
Species: Lampetra planeri, Petromyzon marinus
Common names: Lamproie de planer, Lamproie marine

Spatial coverage

General spatial coverage: The Scorff river in Britanny (France). http://services.sandre.eaufrance.fr/Courdo/Fiche/client/fiche_courdo.php?CdSandre=J5--0220
Coordinates: 47°46'12''N and 48°10'12''N Latitude; 3°20'24''W and 3°15'0''W Longitude 

Temporal coverage: June 1, 2012 - August 31, 2020

Natural collections description

Collection name: Colisa - Collection of Ichtyological Samples
Collection identifier: https://colisa.fr/
Specimen preservation method: Dried
Specimen preservation method: No treatment

Methods

Method step description: 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.
Study extent description: 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.
Sampling description: 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).

Datasets

Dataset description
Object name: Darwin Core Archive Abundances and biological traits of the juveniles lamprey sampled in the survey of lamprey abundance Indice on the Scorff river (France)
Character encoding: UTF-8
Format name: Darwin Core Archive format
Format version: 1.0
Distribution: http://ipt.gbif.fr/archive.do?r=inrae_scorff_ial
Publication date of data: 2021-05-12
Language: English
Licences of use: Creative Commons Attribution (CC-BY) 4.0 License

Metadata language: English
Date of metadata creation: 2021-03-24
Hierarchy level: Dataset

References
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.