Abundances and biological traits of the juveniles trout sampled in the survey of trout abundance Indices (VIGITRUITE®) in the Nivelle river (France)
Citation
Lange F, Guéraud F, Huchet E, Rives J, Prévost E, Marchand F (2024). Abundances and biological traits of the juveniles trout sampled in the survey of trout abundance Indices (VIGITRUITE®) in the Nivelle river (France). Version 1.4. Institut national de recherche pour l’agriculture, l’alimentation et l’environnement (INRAE). Occurrence dataset https://doi.org/10.15468/92nvxf accessed via GBIF.org on 2024-08-31.Description
A survey started in 2006 is conducted every year in early autumn (late September to early October) to quantify the abundance of juvenile trout in the Nivelle in Pays Basque. The electric fishing protocol VIGITUITE® is used. It targets trout young of the year (0+ parr), but older fish (juvenile ≥1+) are also caught and included in this dataset. The data consist of abundance indices and biological traits measured on the fish sampled: sex, length, weight and age. The latter is ascertained from scale samples taken from the fish which size does not allow to determine their age unambiguously. 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.Purpose
Monitoring of juvenile recruitment in trout on the Nivelle riverSampling Description
Study Extent
Nivelle river, CdSandre=S52-0400 Latitude between 43.2426 and 43.3912; longitude between -1.4799 and -1.6694 Source latitude and longitude : 43.2173 -1.5231 Last confluence point latitude and longitude : 43.3854 -1.6639 The Nivelle is a 39 km long coastal stream of Pays Basque. It has its source in Spain and flows into the Bay of Biscay at Saint-Jean-de-Luz. Its drainage basin has a surface area of 238 km2, and is dominated by marly-calcareous formations. It is essentially agro-pastoral with more than 50% of the land area made of moors (Dumas, 2003). The oceanic climate, mild and wet (1700 mm year-1 in St-Pe´e-sur-Nivelle), provides a mean annual discharge of 5.4m3 s-1 downstream from the confluence of the main tributary, the Lurgorrieta, and 7 m3 s-1 at the mouth. The water, neutral to slightly alkaline, is of good quality upstream from Saint-Pée-sur-Nivelle, but deteriorates downstream.Sampling
In the Nivelle, sampling is conducted at 11 sites spread along the mainstem, along the main tributary (i.e. the Lurgorrieta) and smaller tributaries. The sites are visited once a year at the beginning of autumn (end of September to early October).Method steps
- At the selected station, the VIGITRUITE® protocol was designed to ensure that sampling is representative of the range of available habitat conditions, without any a priori bias towards the habitat preferences of the species. This condition is central to meet the objective of standardization, to allow comparison of results from different operators and different watercourses, and to authorize the use of density conversion abacuses per 100 m2. 1. After resetting the counter of the fishing tackle and the hand meter, the operator progresses from downstream to upstream in the watercourse. He is followed by the main operator equipped with the 2 landing nets, who must respect the travel instructions given to him by the operator, as well as by the second operator. 2. The operator follows a predefined zigzag path that takes him from one bank to the other along successive diagonals, at an angle of about 45° to the banks. Along its path, it makes electrode lines about 2 meters long, parallel to the current, and from upstream to downstream. After making the first line along the bank, the operator must visualise the next line before moving: it will be placed on the diagonal, its downstream limit always upstream of the previous line. At the end of the diagonal, if the space is too short for a line along the bank, the line will be placed on the next diagonal, always upstream of the previous line to avoid overlapping. 3. Once the location of the haul has been visualised, the operator indicates to the main fisher where to immerse his semi-circular net, i.e. upstream of the previous haul and offset on the diagonal. The fisher makes sure that the net is well placed on the bottom. If there is any difficulty in placing the net, the operator may decide to shift the position of the haul significantly. The haul is made, then the position of the next haul is displayed, and so on. The result is a sampling by regularly spaced tows from one bank to the other, covering a line of comparable watercourses regardless of the water width of the river. The two stakes marking the downstream and upstream boundaries of the fishing station are also set. 4. For each haul, the operator immerses the electrode about 2 metres upstream of the flat-bottomed landing net. The contact is made when the anode penetrates the water. The fisherman catches the visible fish with his small net, but does not move the large one. The second operator is ready to intervene in case of high abundance. During this operation, it is important that the fishermen catch only the juveniles of the year (0+) and of one year (1+). The presence of larger and older individuals (sub-adults or adults) must not cause a decrease in the team's concentration of juveniles. The hand-held competitor is incremented by one unit at the end of each haul. 5. At the end of the haul, the operator shall leave the anode at the entrance of the large landing net for 1 to 2 seconds before switching off the ignition and instructing the angler to simultaneously raise the flat-bottomed net. The haul made is counted by the hand-counter operated by the bucket holder. Once the collected fish are put in the bucket, the angler follows the operator's instructions to put the large net back in place for the next haul. 6. As the five minutes of fishing approaches, the time counter should be checked before each new haul. Station sampling shall be completed when the effective fishing time (cumulative time of electrical pulses in the water) reaches at least 5 minutes on the counter; no new electrode tows shall be started if the counter already displays 5 minutes. 7. Using the decameter, the width at the downstream stake is measured and its value noted. Then a new width measurement is made by progressing 10 meters upstream, and so on until the end of the station is approached. If necessary, the remaining distance to the upstream post (less than 10 m) is measured to complete the length measurement of the station. This work 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.
- Age is verified from scale reading according to standard methods described by (Baglinière and Le Louarn, 1987) and (Richard and Bagliniere, 1990).
Additional info
This data set is intended to be updated annually.Taxonomic Coverages
-
Salmo truttacommon name: Truite, trout rank: species
Geographic Coverages
The Nivelle river in Basque Country (France). http://services.sandre.eaufrance.fr/Courdo/Fiche/client/fiche_courdo.php?CdSandre=S52-0400
Bibliographic Citations
- Roussel, Jean-Marc, et Dominique Huteau. « Mise au point et validation d’une méthode simple pour estimer l’abondance des juvéniles de truite en cours d’eau ». Rapport de recherche, 2004. -
Contacts
Frédéric Langeoriginator
position: Technician
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: +33559515975
email: Frederic.Lange@inrae.fr
François Guéraud
originator
position: Technician
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: +33559515942
email: Francois.Gueraud@inrae.fr
Emmanuel Huchet
originator
position: Technician
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: +33559515979
email: Emmanuel.Huchet@inrae.fr
Jacques Rives
originator
position: Technician
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
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