Mon GéoSource
Species and habitats - Trisopterus minutus - All ages - Recurrence - IBTS Q3 (1991-2010)
Species habitat occupation, observed during the third quarter IBTS from 1991 to 2010, has been expressed as rare, occasional, frequent, recurrent depending on density levels and variability over time.
Simple
- Alternate title
- IBTS_species_geostatA
- Date ( Publication )
- 2012-03-01T00:00:00
- Identifier
- CHARM_TRISMINrec_IBTS_1991-2010
- Presentation form
- Digital map
- Other citation details
- Source CHARM Consortium
- Credit
- IFREMER
- Credit
- CHARM consortium
- Status
- Completed
- Maintenance and update frequency
- As needed
- Thèmes Sextant ( Theme )
-
- /Biological Environment/Species/Fish Species of Commercial Interest
- Keywords ( Discipline )
-
- Species data set
- CHARM
- Petit tacaud
- Poor cod
- GEMET - INSPIRE themes, version 1.0 ( Theme )
-
- Répartition des espèces
- external.theme.gemet ( Theme )
-
- ressource halieutique
- Use limitation
- research-only
- Access constraints
- License
- Other constraints
- Has to be cited this way in maps : "Source CHARM Consortium"
- Other constraints
- Has to be cited this way in bibliography : "Carpentier A, Martin CS, Vaz S (Eds.), 2009. Channel Habitat Atlas for marine Resource Management, final report / Atlas des habitats des ressources marines de la Manche orientale, rapport final (CHARM phase II). INTERREG 3a Programme, IFREMER, Boulogne-sur-mer, France. 626 pp. & CD-rom"
- Spatial representation type
- Grid
- Denominator
- 2500
- Metadata language
- fr
- Metadata language
- en
- Character set
- UTF8
- Topic category
-
- Oceans
- Biota
- Environment
- Environment description
- Microsoft Windows XP ; ESRI ArcGIS 9.x
- Geographic identifier
- Southern North Sea
N
S
E
W
))
- Begin date
- 1989-01-01
- End date
- 2007-12-31
- Reference system identifier
- WGS 84 (EPSG:4326)
- Number of dimensions
- 2
- Dimension name
- Column
- Dimension size
- 768
- Resolution
- 0.009 degree
- Dimension name
- Row
- Dimension size
- 660
- Resolution
- 0.009 degree
- Cell geometry
- Area
- Transformation parameter availability
- No
Distributor
- OnLine resource
- IBTSQ3_trismin_rec ( OGC:WMS )
- Protocol
- COPYFILE
- Name
- IBTSQ3_trismin_rec
- Hierarchy level
- Dataset
- Statement
- The survey extends in the North Sea, which corresponds to ICES divisions IVb and IVc. The study area is divided into rectangles of 0.5d latitude and 1d longitude using a systematic sampling strategy. The sampling gear is a high opening bottom trawl well adapted for catching demersal species, with a 10 mm mesh size (side knot) for catching juveniles. This sampling gear is polyvalent and is well adapted to the varying seabed types encountered in the study area.Two 30 minutes hauls are performed within each rectangle of the ICES grid. The fishing hauls are chosen using professional fishing plans or found by prospecting. The fishing method is standardised: sampling stations have been each year at similar locations and identical sampling gear is used. At each sampling station, all the fish species are sorted, weighed, counted and measured. For certain commercial species, bony structures (otoliths) are collected.
- Description
- For each species, kriged annual maps were centered, standardised and rescaled to range between 0-1. Mean and SD maps were then computed over all the available period and classified in two classes based on their median values. These were combined to create recurrence map with 4 classes: rare (low mean and low SD), occasional (low mean and high SD), frequent (high mean, high SD), recurrent (high mean and low SD).
- Description
- IBTS, annual scientific survey of IFREMER
- File identifier
- 87fc558a-82ed-460b-8873-eeb84b5e2385 XML
- Metadata language
- en
- Character set
- UTF8
- Hierarchy level
- Dataset
- Date stamp
- 2020-06-03T23:26:02
- Metadata standard name
- ISO 19115:2003/19139 - SEXTANT
- Metadata standard version
- 1.0
Overviews
Spatial extent
N
S
E
W
Provided by
Associated resources
Not available