Phenology and biological traits of migrating brown trouts and sea trouts sampled by trapping in the Oir river (France).

Frédéric Marchand1, Didier Azam1, Richard Delanoë2, Jean-Pierre Destouches1, Julien Tremblay1, Jean-Luc Baglinière3, Marie Nevoux3, Etienne Prévost4, Nadine Herrard5, GBIF France6

1 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; 2 OFB, Pole OFB-INRAE-Agrocampus Ouest-UPPA pour la gestion des migrateurs amphihalins dans leur environnement, F-35042, Rennes, France, Le moulin de Cerisel, 50220, Ducey, France; 3 INRAE, Pole OFB-INRAE-Agrocampus Ouest-UPPA pour la gestion des migrateurs amphihalins dans leur environnement, DECOD, F-35042, Rennes, France., 65 rue de St Brieuc, CS 84215, 35042, Rennes, 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 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; 6 GBIF France, MNHN Geologie CP48, 43 rue Buffon, 75005, Paris

Corresponding author(s): Frédéric Marchand (frederic.marchand@inrae.fr)Didier Azam (Didier.Azam@inrae.fr)Richard Delanoë (richard.delanoe@ofb.gouv.fr)Jean-Pierre Destouches (Jean-Pierre.Destouches@inrae.fr)Julien Tremblay (Julien.Tremblay@inrae.fr)Jean-Luc Baglinière (Jean-Luc.Bagliniere@inrae.fr)Marie Nevoux (Marie.Nevoux@inrae.fr)Etienne Prévost (Etienne.Prevost@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 1984, monitoring has been carried out to observe migration phenology and quantify the abundance of migratory brown trout and sea trout in the Oir basin. In the downstream part of the Oir River, a trapping system controls trouts 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, population composition, trapping, salmon, smot, migration, phenology, brown trout, sea trout, Occurrence

General description

Purpose: Monitoring of brown trout and sea trout 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. 
- Since 202, 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
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_oir_pieges_trf_trm

Taxonomic coverage

Taxonomic ranks
Species: Salmo trutta (Linnaeus, 1758), Salmo trutta (Linnaeus, 1758)
Common names: Brown Trout, sea Trout

Spatial coverage

General spatial coverage: Coastal river in Normandy (France) http://services.sandre.eaufrance.fr/Courdo/Fiche/client/fiche_courdo.php?CdSandre=I9280600
Coordinates: 48°37'37.2''N and 48°37'44.4''N Latitude; 1°16'33.6''W and 1°16'22.8''W Longitude 

Temporal coverage: November 29, 1983 - February 5, 2024

Methods

Method step description: The migratory fish monitoring station has been in operation since 1983. Adults and juvéniles brown trout and sea trout are monitored by means of 2 traps, one for the descending fish and the other for the ascending fish. Trouts are monitored by trapping at the Cerisel Mill, both 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: Oir river : Latitude ranges from 48.6840 to 48.5985; longitude ranges from -1.2949 to -1. 0994. The Oir River is located on the southern edge of Normandy. It is a tributary of the Sélune, a coastal river that flows into the Bay of Mont Saint-Michel. The Oir is 21 km long and has a mean gradient of 1.1%. Annual mean discharge is 1.1 m3/s and the drainage basin area is 85.4 km2, which is dominated by sedimentary schist and metamorphic hornfels with granite inclusions. Agriculture is the main human activity and land use. Migratory fish cannot access the upper Sélune because a dam located 15 km from the sea blocks them. The Oir, with a 16 km long section accessible to migratory fish, is the main spawning ground and the most productive tributary of the Sélune hydrographic network. The migratory fish monitoring station has been in operation since 1983 (GPS coordinates Lambert II extended: E 333834 - N 2409347). It is located on the entrance canal of the Cerisel mill and has two up and down trapping systems. It is located downstream of the Oir about 1.5 km from its confluence with the Sélune. Functional all year round, they allow to follow the migration of brown trout and sea trout.
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 brown trouts and sea trouts sampled by trapping in the Oir 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_oir_pieges_trf_trm
Publication date of data: 2024-03-13
Language: English
Licences of use: Creative Commons Attribution (CC-BY) 4.0 License

Metadata language: English
Date of metadata creation: 2020-11-27
Hierarchy level: Dataset