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

Nicolas Jeannot; Didier Azam; Yoann Guilloux; Mathieu Buoro; Etienne Prévost

doi:10.15468/yvcw8n

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

Citation

Jeannot N, Azam D, Guilloux Y, Buoro M, Prévost E, Marchand F (2024). Phenology and biological traits of migrating salmon (Salmo salar) sampled by trapping in the Scorff river (France).. Version 1.4. Institut national de recherche pour l’agriculture, l’alimentation et l’environnement (INRAE). Occurrence dataset https://doi.org/10.15468/yvcw8n accessed via GBIF.org on 2024-12-14.

Description

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.

Purpose

Monitoring of salmon migration.

Sampling Description

Study Extent

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

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.

Method steps

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.

Additional info

This data set is intended to be updated annually

Taxonomic Coverages

Salmo salar (Linnaeus, 1758)
common name: Atlantique Salmon rank: species

Geographic Coverages

The Scorff river in Britanny (France). http://services.sandre.eaufrance.fr/Courdo/Fiche/client/fiche_courdo.php?CdSandre=J5--022

Bibliographic Citations

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. -

Contacts

Nicolas Jeannot
originator
position: Engineer
INRAE, Pole OFB-INRAE-Agrocampus Ouest-UPPA pour la gestion des migrateurs amphihalins dans leur environnement, U3E, F-35042, Rennes, France.
Moulin des Princes
Pont-Scorff
56620
FR
Telephone: +33 297325429
email: Nicolas.jeannot@inrae.fr

Didier Azam
originator
position: Engineer
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
Rennes
35042
FR
Telephone: +33 223485786
email: Didier.Azam@inrae.fr

Yoann Guilloux
originator
position: Technician
FDPPMA56
Moulin des Princes
Pont-Scorff
56620
FR
email: yoannguilloux.mdp.fedepeche@orange.fr

Mathieu Buoro
originator
position: Researcher
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
St-Pée-sur-Nivelle
64310
FR
Telephone: +33559515982
email: mathieu.buorot@inrae.fr

Etienne Prévost
originator
position: Researcher
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
St-Pée-sur-Nivelle
64310
FR
Telephone: +33559515983
email: Etienne.Prevost@inrae.fr

Frédéric Marchand
metadata author
position: Engineer
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
Rennes
35042
FR
Telephone: +33 223485786
email: frederic.marchand@inrae.fr

Nadine Herrard
programmer
position: Programmer
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
Rennes
35042
FR
Telephone: +33 223485786
email: Nadine.Herrard@inrae.fr

GBIF France
distributor
position: IT support
GBIF France
MNHN Geologie CP48, 43 rue Buffon
Paris
75005
FR
Telephone: +33143798065
email: connexion@gbif.fr
homepage: http://www.gbif.fr

Frédéric Marchand
administrative point of contact
position: Engineer
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
Rennes
35042
FR
Telephone: +33 223485786
email: frederic.marchand@inrae.fr