Title

Oceanographic cruise - ORHAGO (Observation of the benthic HAlieutic Resources of the Bay of Biscay)

Date (Publication)

2022-02-09

Citation identifier

FR-DCSMM-PDS-ORHAGO

Presentation form

Digital profile

Abstract

The ORHAGO cruises (Observation of the benthic aquatic resources of the GOlfe de Gascogne) are part of Ifremer's mission of observation and expertise in support of fisheries management. Their main aim is to obtain series of abundance indices for flatfish and in particular for sole. Consequently, the choice was made to adopt a beam trawl to comply with the standards of the International Council for the Exploration of the Sea (ICES) for flatfish. This choice has made it possible to be part of the campaigns coordinated by ICES and thus to be a member of a community in which the methodology and results can be discussed each year in the ICES WGBEAM working groups.

Since 2013, the ORHAGO campaigns have been used to assess the state of the Bay of Biscay sole stock. They allow this assessment to be carried out analytically, i.e. using a model to analyse and simulate the dynamics of the stock. The ORHAGO campaigns are also a source of information on the evolution of benthic populations and coastal benthic habitats in the Bay of Biscay.

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

Annually

Theme

• ICES, WGBEAM

• Abundance indices

• Beam trawl

• Sole

• Flat fish

• Benthos

• Benthic populations

• Fishing resources

GEMET - INSPIRE themes, version 1.0

• Environmental monitoring facilities

Sous-regions marines

• /Metropolitan France/Bay of Biscay

DCSMM : Descripteurs

• D3: Commercially Exploited Species

Thèmes Sextant

• /Human Activities/Oceanographical Cruises

SIH - Façade maritime

• Atlantique

SIH - Types de jeu de données

• /Observed Data/Campaigns

Thématiques - SIMM

• /Uses and Human Activities/Fisheries and aquaculture

Access constraints

Restricted

Language

Français

Character set

UTF8

Topic category

• Oceans

Begin date

2007-11-02

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_ORHAGO
WWW:LINK	https://sih.ifremer.fr/prive/Acces-aux-donnees/Extractions/Campagnes/Donnees-Campagnes-halieutiques	Access to SIH fisheries cruises data

OnLine resource

Protocol	Linkage	Name
WWW:LINK	http://dx.doi.org/10.18142/23	Catalogue of cruises : ORHAGO
WWW:LINK	https://datras.ices.dk/Data_products/Download/Download_Data_public.aspx	Data in DATRAS format

Hierarchy level

Dataset

Statement

The ORHAGO cruises are annual cruises which aim, through beam trawl tows in the same places and at the same time each year, to :

- obtain information on sole recruitment to improve short-term forecasts of the effect of fishing,

- produce an index of abundance for assessing the sole stock in the Bay of Biscay,

- improve knowledge of the dynamics of sole recruitment by monitoring reference stations near major nurseries,

- to have a series of population indicators to monitor the evolution of benthic ecosystems exploited by fishing.

The data is collected as part of a scientific monitoring programme.

Sampling gear: 4 m wide beam trawl with a 40 mm stretched mesh.

Area sampled: sole habitat in the Bay of Biscay

Sampling unit: 30-minute haul

Period: 1 November - 10 December

Target: 50 to 70 hauls per year, doubled hauls (1 day and 1 night if possible)

• Sample plan(s) :

Systematic with stratification

• Precision on the type of data :

Benthos determined since 2011.

• Parameter(s) observed or measured :

Number, size (fish and commercial benthos species), weight, age ((species of commercial interest whose dynamics are monitored)

• Resolution of the parameter(s) :

By fishing operation, systematic analysis of scientific fishing catches

• Format(s):

The available data exist in the format: csv

Metadata

File identifier

bc8a2fa9-22fc-4f45-89df-c422c5aa7988

Metadata language

Français

Other language

Language	Character encoding
English

Character set

UTF8

Parent identifier

Campagnes océanographiques - Observations pour la surveillance halieutique

99e16a35-8090-4897-aa2b-c5c0951aabea

Hierarchy level

Series

Date stamp

2024-08-02T12:52:20.128Z

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	Local service desk