Phenology and biological traits of migrating salmon (Salmo salar) sampled by trapping in the Scorff river (France).

Nicolas Jeannot1, Didier Azam2, Yoann Guilloux3, Mathieu Buoro4, Etienne Prévost4, Frédéric Marchand2, Nadine Herrard2, GBIF France5

1 INRAE, Pole OFB-INRAE-Agrocampus Ouest-UPPA pour la gestion des migrateurs amphihalins dans leur environnement, U3E, F-35042, Rennes, France., 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, 56620, Pont-Scorff, France; 4 Université de Pau et des Pays de l’Adour, e2s-UPPA, INRAE, OFB, Agrocampus-Ouest, ECOBIOP, Pôle pour la gestion des migrateurs amphihalins dans leur environnement, Saint-Pée-sur-Nivelle, France, Aquapôle - Ibarron, 64310, St-Pée-sur-Nivelle, France; 5 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)Mathieu Buoro (mathieu.buorot@inrae.fr)Etienne Prévost (Etienne.Prevost@inrae.fr), Frédéric Marchand (frederic.marchand@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

Since 1995, monitoring has been carried out to observe migration phenology and quantify the abundance of migratory salmon in the Scorff basin. In the downstream part of the Scorff River, a trapping system controls salmon migration  by means of 2 traps, one for the descending fish and the other for the ascending fish. On this occasion, biometric characteristics are developed to characterize the population in order to feed this data set.

Keywords: Occurrence, Observation, population composition, trapping, salmon, smot, migration, phenology, Occurrence

General description

Purpose: Monitoring of salmon migration.
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 - FEAMP : (European Fund for Maritime Affairs and Fisheries).
- Since 2017, data collected on salmon in 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.
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: https://ipt.gbif.fr/resource?r=inrae_scorff_ps

Taxonomic coverage

Taxonomic ranks
Species: Salmo salar (Linnaeus, 1758)
Common names: Atlantique Salmon

Spatial coverage

General spatial coverage: The Scorff river in Britanny (France). http://services.sandre.eaufrance.fr/Courdo/Fiche/client/fiche_courdo.php?CdSandre=J5--022
Coordinates: 47°46'12''N and 48°10'12''N Latitude; 3°20'24''W and 3°15'0''W Longitude 

Temporal coverage: June 24, 1994 - March 4, 2024

Methods

Method step description: The migratory fish monitoring station has been in operation since 1993. Adults and smolts salmon are monitored by means of 3 traps, two for the descending fish and the other for the ascending fish. Salmon are monitored by trapping at the Tan Mill and traps operating the whole year. Trap configuration allows only partial capture depending on the flow which requires to estimate the effectiveness of the traps.
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: The traps are surveyed in the morning every day and several times a day during periods of high migration throughout the year. 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 for smolts and 0.5 g for adults). Sex is determined on the basis of phenological criteria 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.

Datasets

Dataset description
Object name: Darwin Core Archive Phenology and biological traits of migrating salmon (Salmo salar) sampled by trapping in the Scorff river (France).
Character encoding: UTF-8
Format name: Darwin Core Archive format
Format version: 1.0
Distribution: https://ipt.gbif.fr/archive.do?r=inrae_scorff_ps
Publication date of data: 2024-03-12
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
Buoro, M., E. Prévost, et O. Gimenez. « Digging through model complexity: using hierarchical models to uncover evolutionary processes in the wild ». Journal of Evolutionary Biology 25, nᵒ 10 (octobre 2012): 2077‑90. https://doi.org/10.1111/j.1420-9101.2012.02590.x.
Buoro, Mathieu, Olivier Gimenez, et Etienne Prévost. « Assessing adaptive phenotypic plasticity by means of conditional strategies from empirical data: the latent environmental threshold model. » Evolution 66, nᵒ 4 (avril 2012): 996‑1009. https://doi.org/10.1111/j.1558-5646.2011.01484.x.
Buoro, Mathieu, Etienne Prévost, et Olivier Gimenez. « Investigating evolutionary trade-offs in wild populations of atlantic salmon (salmo salar): incorporating detection probabilities and individual heterogeneity: estimating trade-offs with mark-recapture data ». Evolution 64, nᵒ 9 (septembre 2010): 2629‑42. https://doi.org/10.1111/j.1558-5646.2010.01029.x.
Otero, Jaime, Jan Henning L’Abée-Lund, Ted Castro-Santos, Kjell Leonardsson, Geir O. Storvik, Bror Jonsson, Brian Dempson, et al. « Basin-Scale Phenology and Effects of Climate Variability on Global Timing of Initial Seaward Migration of Atlantic Salmon ( Salmo Salar ) ». Global Change Biology 20, no 1 (janvier 2014): 61‑75. https://doi.org/10.1111/gcb.12363.
Legrand Marion, Cédric Briand, Laëtitia Buisson, Gwenaël Artur, Didier Azam, Aurore Baisez, David Barracou, et al. « Contrasting trends between species and catchments in diadromous fish counts over the last 30 years in France ». Knowledge & Management of Aquatic Ecosystems, no 421 (2020): 7. https://doi.org/10.1051/kmae/2019046.