Date (Publication)

2006-04-07

Citation identifier

FR-DCSMM-PDS-LANGOLF

Presentation form

Digital profile

Purpose

The aims of the cruise are:

(i) To estimate an abundance index for the langoustine stock size-structure by sex.

(ii) Spatial distribution by sedimentary unit of the population

(iii) Macroscopic observation of stages of sexual maturity in females.

(iv) To estimate abundance indicators for species associated with experimental catches.

(v) (particularly hake, galathea, monkfish, pouting, blue hake, sole).

(vi) To collect and sample calcified parts to determine the age of fishes (species of commercial interest whose dynamics are monitored).

(vii) Sampling by sedimentary strata of associated benthic microfauna and megafauna.

Credit

IFREMER

Status

On going

Point of contact

Organisation name	Individual name	Electronic mail address	Role
IFREMER	IFREMER SIH	harmonie@ifremer.fr	Author
IFREMER	IFREMER SIH	harmonie@ifremer.fr	Publisher

Maintenance and update frequency

historical

Theme

• Species

• Assembly

• Benthos

• Sedimentary strata

• Langoustine, hake

• Size, sex

• Stratified sampling

GEMET - INSPIRE themes, version 1.0

• Environmental monitoring facilities

Sous-regions marines

• /Metropolitan France/Bay of Biscay

DCSMM : Type d'espace concerné

• Pas d'espace particulier concerné

DCSMM : Descripteurs

• D3: Commercially Exploited Species

DCSMM : Méthodes de recueil des données

• Observation directe

Thèmes Sextant

• /Human Activities/Oceanographical Cruises

SIH - Types de jeu de données

• /Observed Data/Campaigns

SIH - Façade maritime

• Atlantique

Cadre Réglementaire - SIMM

• Marine Strategy Framework Directive (MSFD)

Thématiques - SIMM

• /Uses and Human Activities/Fisheries and aquaculture

Access constraints

Restricted

Code

https://doi.org/10.18142/20

Association Type

Cross reference

Initiative Type

Platform

Language

Français

Character set

UTF8

Topic category

• Oceans

Begin date

2006-04-07

End date

2013-05-21

Supplemental Information

Financers :

IFREMER

Europe

Direction Générale des Affaires Maritimes, de la Pêche et de l'Aquaculture (DGAMPA)

Distribution format

Name	Version

OnLine resource

Protocol	Linkage	Name
OGC:WMS	https://sextant.ifremer.fr/services/wms/sismer	campagnes_LANGOLF
WWW:LINK	https://sih.ifremer.fr/prive/Acces-aux-donnees/Extractions/Campagnes/Donnees-Campagnes-halieutiques	Access to SIH fisheries cruises data

Hierarchy level

Dataset

Statement

On the entire sector, with a total surface area of around 11680 km², five sedimentary strata are defined according to mud content and origin. Sampling method: random stratified, proportionally allocated a ratio which takes into account: (1) the surface of each layer and (2) an index relating to the concentration of fishing vessels.

The locations are trawled randomly

Fishing gear consists of twin trawls (two trawlers connected by their wing points at the centre) much like those used in commercial fishing, except that the mesh in the codend is only 20mm fully-stretched, in order to retain immature individuals.

Each trawl is equipped with a SCANMAR “headline” and “wing point” equipment in order to check the geometry of the trawl gear during trawls (vertical and horizontal openings),and to define the moment when trawling on the sea floor begins. The panels are equipped with a GEONET device which provides data on the geometry of the gear and temperature at the sea floor.

Thanks to these devices, it is possible to calculate the surface area of the sea floor which has been effectively cleared for each sampling unit. A sensor is connected to the trawler’s headline in order to obtain hydrological information (pressure, temperature and conductivity).

The standard sampling plan includes 70 trawling locations for duration of 30 minutes. Different measurements are taken during each trawl.

1) Trawler performance

2) Biological observation of all species

3) Hydrological and Bathmetric measurements

• Sampling plan(s) :

Random, stratified

• Precision on the type of data :

Lepidorhombus whiffiagonis, Lophius budegassa, Lophius piscatorius, Merluccius merluccius, Solea vulgaris, mullus surmulutus, Nephrops norvegicus

• Parameter(s) observed or measured :

Size

Sex

Maturity

Collection of otoliths

Identification

Assembly

Abundance

• Resolution of parameter(s) :

By fishing operation, systematic analysis of scientific fishing catches

• Format(s):

The available data exist in the format: csv

Description

Data type :

Actinopterygii

Crustaceans

Benthos

Precision on the data type :

Lepidorhombus whiffiagonis, Lophius budegassa, Lophius piscatorius,Merluccius merluccius, Solea vulgaris, mullus surmulutus, Nephrops norvegicus

Measured or observed parameters :

Size

Sex

Maturity

Otolith sampling

Identification

Assembly

Abundance

Update frequency : annual

Observation frequency : yearly, for 14 days

Metadata

File identifier

b531674a-b4f1-4730-ab54-4e0f9c4be641 XML

Metadata language

Français

Character set

UTF8

Parent identifier

Campagnes océanographiques - Observations pour la surveillance halieutique

99e16a35-8090-4897-aa2b-c5c0951aabea

Hierarchy level

Series

Date stamp

2024-08-02T12:47:24.707Z

Metadata standard name

ISO 19115:2003/19139 - SEXTANT

Metadata standard version

1.0

Metadata author

Organisation name	Individual name	Electronic mail address	Role
IFREMER SIH		harmonie@ifremer.fr	Point of contact

Other language

Language	Character encoding
English
French	UTF8