Species and habitats - Loligo Forbesi (Northern/Veined squid) - All ages - Mean abundance in October, standard deviation and summed kriging error maps during CGFS (1993-2006)
Biologic data have been expressed in abundance (numbers or density values (nbr/km²)) and always required to be log-transformed using a log10(x+1) transformation. Abundance mean (mean) and standard deviation (st) have been calculated. The sum of the kriging error for each yearly kriged abundance fits to the kriging error (v).
Simple
- Alternate title
-
CGFS_species_geostatS
- Date (Publication)
- 2009-12-31T00:00:00
- Citation identifier
- CHARM_LOLIFOR_CGFS_MEAN_KRIG_ERR_R
- Presentation form
- Digital map
- Other citation details
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Source CHARM Consortium
- Credit
-
IFREMER
- Credit
-
CHARM consortium
- Status
- Completed
- Point of contact
-
Organisation name Individual name Electronic mail address Role Ifremer
Franck Coppin
Resource provider CHARM Consortium
CHARM Consortium
Custodian
- Maintenance and update frequency
- As needed
-
Thèmes Sextant
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-
/Biological Environment/Species/Fish Species of Commercial Interest
-
- Discipline
-
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Species data set
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CHARM
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-
GEMET - INSPIRE themes, version 1.0
-
-
Répartition des espèces
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-
external.theme.gemet
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-
ressource halieutique
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- Use limitation
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research-only
- Access constraints
- License
- Other constraints
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Has to be cited this way in maps : "Source CHARM Consortium"
- Other constraints
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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
- Language
- Français
- Language
- English
- Character set
- UTF8
- Topic category
-
- Oceans
- Biota
- Environment
- Environment description
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Microsoft Windows XP ; ESRI ArcGIS 9.x
- Geographic identifier
- Eastern English Channel
))
- Begin date
- 1988-01-01
- End date
- 2006-12-31
- Reference system identifier
- 4326
- Number of dimensions
- 2
- Dimension name
- Column
- Dimension size
- 1288
- Resolution
- 0.009 degree
- Dimension name
- Row
- Dimension size
- 618
- Resolution
- 0.009 degree
- Cell geometry
- Area
- Transformation parameter availability
- No
Distributor
- Distributor contact
-
Organisation name Individual name Electronic mail address Role Ifremer - Centre de Brest
Distributor
- Distributor format
-
Name Version
- OnLine resource
-
Protocol Linkage Name WWW:LINK
http://www.ifremer.fr/charm/ OGC:WMS
https://sextant.ifremer.fr/services/wms/wms_charm CHARM_LOLIFOR_CGFS_MEAN_R
OGC:WMS
https://sextant.ifremer.fr/services/wms/wms_charm CHARM_LOLIFOR_CGFS_MEAN_SD_R
OGC:WMS
https://sextant.ifremer.fr/services/wms/wms_charm CHARM_LOLIFOR_CGFS_MEAN_KRIG_ERR_R
COPYFILE
Mean abundance
COPYFILE
Standard deviation
COPYFILE
Kriging error
- Hierarchy level
- Dataset
- Statement
-
The survey extends from the Eastern English Channel to the south of the North Sea, which corresponds to ICES divisions VIId and IVc. The study area is divided into rectangles of 15¿ latitude and 15¿ 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.One or two 30 minutes hauls are performed within each rectangle of the CGFS grid (two in the coastal zone and one offshore). 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. Since 1997, temperature and salinity (surface and bottom) are measured using a probe attached on the headrope of the trawl. At each sampling station, all the fish species are sorted, weighed, counted and measured. For certain commercial species, bony structures (otoliths) are collected.
- Description
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For each species, the average (mean) and the standard deviation (sd) are computed from kriged annual maps over all the available period. The sum of all annual kriging error over the same period (v) is also computed. The resulting grids of points were imported into ArcMap and interpolated with the Spatial Analyst extension in order to create a continuous raster of 1 km² resolution. The resulting maps illustrate the average pattern (mean), its interannual variability (sd) and its overall interpolation error (summed kriging error) of each parameter.
- Description
-
CGFS, annual scientific survey of IFREMER
Metadata
- File identifier
- e144fab7-a530-4e37-8e67-adddb7a12ecc XML
- Metadata language
- English
- Character set
- UTF8
- Hierarchy level
- Dataset
- Date stamp
- 2020-06-04T00:32:03
- Metadata standard name
-
ISO 19115:2003/19139 - SEXTANT
- Metadata standard version
-
1.0
- Metadata author
-
Organisation name Individual name Electronic mail address Role Ifremer
Sandrine Vaz
Point of contact
Overviews
Spatial extent
Provided by
