Abundances and biological traits of fish sampled by electrofishing (except specific abundance indices) on the River Oir since 1988 (France).

Frédéric Marchand1, Didier Azam1, Richard Delanoë2, Jean-Pierre Destouches1, Julien Tremblay3, Jean-Luc Baglinière1, Marie Nevoux4, Etienne Prévost5, GBIF France6, Nadine Herrard1

1 INRAE U3E, Pôle OFB-INRAE-Agrocampus Ouest-UPPA pour la gestion des migrateurs amphihalins dans leur environnement, 65 rue de St Brieuc, CS 84215, 35042, Rennes, France; 2 OFB DRAS, INRAE U3E, Pôle OFB-INRAE-Agrocampus Ouest-UPPA pour la gestion des migrateurs amphihalins dans leur environnement, Le moulin de Cerisel, 50220, Ducey, France; 3 INRA-U3E, 65 rue de St Brieuc, CS 84215, 35042, Rennes, France; 4 INRAE ESE, Pôle OFB-INRAE-Agrocampus Ouest-UPPA pour la gestion des migrateurs amphihalins dans leur environnement, 65 rue de St Brieuc, CS 84215, 35042, Rennes, France; 5 INRAE ECOBIOP, Pôle OFB-INRAE-Agrocampus Ouest-UPPA pour la gestion des migrateurs amphihalins dans leur environnement, Aquapôle - Ibarron, 64310, St-Pée-sur-Nivelle, France; 6 GBIF France, 43 rue Buffon, 75005, Paris, France

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@inra.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.

Resource Citation

Marchand F, Azam D, Delanoë R, Destouches J, Tremblay J, Baglinière J, Nevoux M, Prévost E (2022): Abundances and biological traits of fish sampled by electrofishing (except specific abundance indices) on the River Oir since 1988 (France).. v1.8. Institut national de recherche pour l’agriculture, l’alimentation et l’environnement (INRAE). Dataset/Occurrence. http://ipt.gbif.fr/resource?r=inra_pe_oir&v=1.8

Abstract

Since 1988, an annual campaign is conducted to quantify by electrofishing the abundance of fishes in the Oir basin. Originally, the main target species were salmon and trout. Beginning in 2000, eels were monitored in the same way as salmonids. The survey of the entire fish community has been carried out on a network of seven sites. It is usually done in September and October. Two sites are also monitored in May for all species. The data consists of 1738 electrofishing operations and 153068 fish records. Biological traits measured on the fish sampled are sex, maturity status, length, weight and age. Some of the salmon, trout and eels are identified individually with a pit tag. Scale sampling is carried out on a subsample of individuals to estimate the age of the fish. The survey is carried out under the Research Observatory on Diadromous Fish in Coastal Streams (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 these heritage species

Keywords: Occurrence, Observation, Population density, population distribution, catch effort, salmo salar, salmon, Occurrence

General description

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 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 (DCF - Work Plan for data collection in the fisheries and aquaculture sectors 2017-2019) for the European regulations on fisheries management.
In this context, INRA and AFB contribute to the National Work Program piloted by the DPMA of the Ministry of the Environment. This program is financially supported by FEAMP
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=inra_pe_oir

Taxonomic coverage

General taxonomic coverage description: Freswater fish and crayfish

Spatial coverage

General spatial coverage: Oir river in Normandy (France). Latitude ranges from 48.6840 to 48.5985; longitude ranges from -1.2949 to -1. 0994.
Coordinates: 48°36'0''N and 48°40'48''N Latitude; 1°17'24''W and 1°6'0''W Longitude 

Temporal coverage: October 3, 1988 - September 29, 2021

Natural collections description

Collection name: Colisa - Collection of Ichtylogical Samples
Collection identifier: http://147.99.222.8:8080/BDEI/
Specimen preservation method: Dried
Specimen preservation method: Other
Specimen preservation method: No treatment
Curatorial unit: Between 11731 and 11731 (Fin)
Curatorial unit: Between 17716 and 17716 (Scale)

Methods

Method step description: 
- . 	Electrofishing surveys were part of long-term monitoring programmes on each river and followed consistent protocols with standardised effort. Fish capture was carried out with different electrofishing equipment using similar settings (direct current, 200-300V). When the target is only salmonids and eels, electrofishing is carried out on a set of sites spread over the entire river network of the Oir River. The capture efficiency is evaluated by carrying out 2 passages on several representative sites.
- . 	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 (hereafter length to the nearest millimetre,mm), except for fish whose caudal fin has no fork and for which the total length has been measured. Fish are then weighed (0.2 g precision) and examined for evidence of sexual maturity (mature if it had a soft and distended underbelly from enlarged gonads [Frome] or produced milt when massaged gently. Scales and a piece of fin are taken from a subsample of individuals. Some of the salmon, trout and eels are identified individually with a pit tag. All the fish sampled are then released in their original site.
- . 	Age is verified from scale reading according to standard methods described by (Baglinière and Le Louarn, 1987) and (Richard and Bagliniere, 1990).
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 kmlong section accessible to Atlantic salmon, is the main spawning ground and the most productive tributary of the Sélune hydrographic network.
Sampling description: Since 1988, an annual campaign is conducted to quantify by electrofishing the abundance of fishes in the Oir basin. Over the years, sampling has been conducted at 49 sites spread along the mainstem and 53 situated on six tributaries. Originally, the main target species were salmon and trout. Beginning in 2000, eels were monitored in the same way as salmonids. The inventory of the entire fish community has been carried out on a network of seven sites. It is usually done in autumn. Two sites on two tributaries are also monitored in May for all species.

Datasets

Dataset description
Object name: Darwin Core Archive Abundances and biological traits of fish sampled by electrofishing (except specific abundance indices) on the River Oir since 1988 (France).
Character encoding: UTF-8
Format name: Darwin Core Archive format
Format version: 1.0
Distribution: http://ipt.gbif.fr/archive.do?r=inra_pe_oir
Publication date of data: 2022-03-18
Language: English
Licences of use: Creative Commons Attribution (CC-BY) 4.0 License

Metadata language: English
Date of metadata creation: 2018-08-27
Hierarchy level: Dataset

References
Baglinière, J. L., and Le Louarn, H. 1987. Caractéristiques scalimétriques des principales espèces de poissons d’eau douce de France. Bulletin Français de la Pêche et de la Pisciculture: 1–39.
Richard, A., and Bagliniere, J. L. 1990. Description et interprétation des écailles de truites de mer (Salmo trutta L.) de deux rivières de Basse-Normandie : l’Orne et la Touques. Bulletin Français de la Pêche et de la Pisciculture: 239–257.