National observation network for the blue mussel Mytilus edulis

The national observation network for the blue mussel (MYTILOBS), set up in 2012, aims to monitor the growth and mortality of mussels produced for the market.

The MYTILOBS is based on the experience of the regional network (REMOULA) which has been monitoring the growth of the blue mussel in the Charentais inlet since 2000.

Monitoring mainly takes place the year following the year of capture: it thus integrates the main seasons of the biological life of the mussel, from winter maturation to spring growth, then to summer and fall fattening, the two periods when they are mainly sold. The choice of monitoring sites was decided in consultation between the Regional Environmental Resource Laboratories and the industry. For North Brittany, this is the site of Vivier-sur-Mer in (the sector of) the bay of Mont-Saint-Michel (mussel poles). Each breeding site is monitored every three months.

Many parameters are measured including mussel size, weight and mortality. These data are examined taking into account environmental conditions such as temperature, salinity or the abundance and richness of the microalgae on which the shellfish feed.

The Mytilobs national network is located in the main mussel-breeding regions of the Atlantic coast: Normandy, North Brittany, South Brittany, Pays de Loire and Poitou-Charentes. The sites of Agon (West Cotentin), Vivier (the bay of Mont Saint-Michel), Pont Mahe (Vilaine bay), Aiguillon (Breton inlet), Yves (Pertuis d’Antioche strait) representing, from north to south, mussel culture using poles. The Filiere site (Pertuis Breton - strait) represents mussels culture using ropes, in full water.

Simple

Date (Creation)
2012-01-01T00:00:00
Citation identifier
FR-DCSMM-PDS-MYTILOBS
Presentation form
Digital profile
Purpose

Expertise en matiere de performances biologiques et zootechniques, notamment en cas d'anomalies biologiques. Plus generalement, elle constituera un élément d'évaluation de l'état de santé des écosystèmes et pourra aider à orienter les stratégies de production.
Credit

Producteurs de données : Ifremer
Status
On going
Point of contact
Organisation name Individual name Electronic mail address Role

IFREMER

Julien Normand

Julien.Normand@ifremer.fr

Point of contact
Maintenance note

Durée du réseau : réseau pérenne
Theme

  • Mytilus edulis

  • Moule

  • Bouchot

  • Mortalité

  • Croissance

  • Température

  • Phytoplancton

  • Réseau

  • Biométrie

  • Environnement

  • Observations côtières

GEMET - INSPIRE themes, version 1.0

  • Environmental monitoring facilities

DCSMM : Type d'espace concerné

  • Pas d'espace particulier concerné

DCSMM : Descripteurs

  • D9: Health Issues

  • D3: Commercially Exploited Species

DCSMM : Méthodes de recueil des données

  • Observation par point

Thèmes Sextant

  • /Human Activities/Coastal monitoring networks

Centre de données ODATIS

  • CDS-IS-SISMER

Type de jeux de donnée ODATIS

  • Observational data

Thèmatiques ODATIS

  • Monitoring system

Sous-regions marines

  • /Metropolitan France

  • /Metropolitan France/Channel-North Sea

  • /Metropolitan France/Celtic Seas

  • /Metropolitan France/Bay of Biscay

Thématiques - SIMM

  • Research

  • /Environmental Status/Pollution

  • /Environmental Status/Coastal areas

  • /Environmental Status/Species

  • /Environmental Status/Biogeochemistry

ODATIS aggregation parameters and Essential Variable names

  • Invertebrates

  • Phytoplankton
Keywords

  • DCSMM

  • hvd

High-value dataset categories

  • Observation de la terre et environnement
Access constraints
Other restrictions
Use limitation

Convention DPMA 2014-IFREMER n°13 /1210868 / NYF Projet PJ0701 Observations, analyse et prévision des performances conchylicoles.
Spatial representation type
Vector
Denominator
500000
Language
Français
Character set
UTF8
Topic category
  • Environment
N
S
E
W
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Supplemental Information

Maître d'ouvrage :

Direction générale de l’alimentation (DGAL)


Maître d'œuvre :

IFREMER


Financeur(s) :

DGAl
Reference system identifier
EPSG / WGS 84 (EPSG:4326) / 7.9
Topology level
Geometry only
Geometric object type
Complex
Geometric object count
0
Distribution format
Name Version
OnLine resource
Protocol Linkage Name

WWW:LINK

 		http://archimer.ifremer.fr/doc/00270/38086/36231.pdf

Campagne 2014-2

OGC:WMS

 		https://sextant.ifremer.fr/services/wms/odatis

ODATIS_MYTILOBS

WWW:LINK

 		http://archimer.ifremer.fr/doc/00334/44494/

Campagne 2015

WWW:LINK

 		http://archimer.ifremer.fr/doc/00411/52247/

Campagne 2015/2016

WWW:LINK

 		http://wwz.ifremer.fr/lern/reseaux-d-Observations/Ressources-conchylicoles/Observatoire-Mytilicole

Observatoire Mytilicole
Hierarchy level
Dataset

Conformance result

Date (Creation)
Explanation

Non assessed
Pass
No
Statement

2015 was a year of transition initiating changes in how Ifremer monitors the health of marine molluscs. The monitoring process consists of 4 strands and serves 2 objectives.

Three strands have been put in place to meet the first objective.

Planned monitoring of mortalities and diseases of the Crassostrea gigas oyster using the RESCO 2 network.

Planned monitoring of blue mold Mytilus edulis mortalities and diseases using the MYTILOBS 2 network. These two networks focus on regular monitoring of animal health indicators at the sites.

Events monitoring of mortalities of other species of marine molluscs (the Mytilus galloprovincialis mussel included) uses the REPAMO network 2. This network makes use of the data on mortalities reported by shellfish farmers or by professional fishermen to the decentralized services of the State, the Departmental Directorate of Territories and Sea.

One strand has been put in place to meet the second objective. The planned, targeted and risk-based monitoring of the introduction and establishment of Microcytos mackini in the Crassostrea gigas cupped oyster depends on the RESCO 2 network. This monitoring is based on regular follow-up of the Loix-en-Ré site. The surveillance applies to shellfish populations of commercial interest on the French coast whether they are farmed or wild.

The epidemiological unit may be a concession or an oyster farm, a hatchery-nursery, a natural bed, an area or part of an area. All epidemiological units can be sampled according to the given epidemiological surveillance protocol. Two types of data are collected in the REPAMO 2 network: information on the collection (commemorative) and results from analyses. For each epidemiosurveillance protocol, memorials are systematically collected by Ifremer field correspondents based on questionnaires developed as part of a quality approach. The animals collected are analyzed by the analytical section of Ifremer’s Pathology and Genetics Laboratory in La Tremblade. The analytical reference method recommended for the detection of pathogenic organisms of regulated diseases is histopathology. The number of samples analyzed makes it possible to compensate for the low sensitivity and specificity of this tool, especially for infectious agents other than parasites. Other diagnostic tools are used in addition. These mostly include molecular biology techniques such as PCR but also cultures (bacterial spread - isolation of majority strains, parasitic in thioglycolate medium), in situ hybridization, transmission electron microscopy, characterization of species by sequencing.
Description

Nombre de points d'observation ou de mesure : 13


Type de données :

La biometrie est realisee individuellement sur 30 moules, sauf pour le poids total. Les mesures sont effectuees apres le nettoyage des coquillages.


Paramètre(s) observé(s) ou mesuré(s) :

- Mesures (longueur, largeur, Le gain de longueur saisonnier) ;

- Poids total ;

- Poids sec (poids sec de chair, poids sec de coquille) ;

- Indices de condition ;

- Mortalité.


Fréquence d'observation : Trimestrielle

Metadata

File identifier
3b278334-ba60-4b9b-83d9-6117fc6fbe32 XML
Metadata language
Français
Character set
UTF8
Hierarchy level
Dataset
Date stamp
2024-06-13T13:34:42.125Z
Metadata standard name

ISO 19115:2003/19139 - SEXTANT
Metadata standard version

1.0
Metadata author
Organisation name Individual name Electronic mail address Role

Sextant

sextant@ifremer.fr

Point of contact
Other language
Language Character encoding
English
French UTF8
 
 

Overviews

overview

Spatial extent

N
S
E
W
thumbnail


Keywords

Biométrie Bouchot Croissance Environnement Mortalité Moule Mytilus edulis Observations côtières Phytoplancton Réseau Température
Centre de données ODATIS
CDS-IS-SISMER
DCSMM : Descripteurs
D3: Commercially Exploited Species D9: Health Issues
DCSMM : Méthodes de recueil des données
Observation par point
DCSMM : Type d'espace concerné
Pas d'espace particulier concerné
GEMET - INSPIRE themes, version 1.0
Environmental monitoring facilities
ODATIS aggregation parameters and Essential Variable names
Invertebrates Phytoplankton
Thèmatiques ODATIS
Monitoring system
Thèmes Sextant
/Human Activities/Coastal monitoring networks
Thématiques - SIMM
/Environmental Status/Biogeochemistry /Environmental Status/Coastal areas /Environmental Status/Pollution /Environmental Status/Species Research
Type de jeux de donnée ODATIS
Observational data

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