Mon GéoSource
Species and habitats - Limanda limanda (Common Dab) - Nurseries French Coasts - Multi-annual abundance in September
Abundance of several species in coastal nurseries along french coasts.
Simple
- Alternate title
- FYFS_species_geostatP
- Date ( Publication )
- 2009-12-31T00:00:00
- Identifier
- CHARM_LIMALIM_NURS_FYFS_R
- 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
- 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
- 25000
- Metadata language
- en
- Metadata language
- fr
- Character set
- UTF8
- Topic category
-
- Oceans
- Biota
- Environment
- Environment description
- Microsoft Windows XP ; ESRI ArcGIS 9.x
- Geographic identifier
- Eastern English Channel
N
S
E
W
))
- Begin date
- 1977-01-01
- End date
- 2006-12-31
- Reference system identifier
- 4326
- Number of dimensions
- 2
- Dimension name
- Column
- Dimension size
- 426
- Resolution
- 0.009 degree
- Dimension name
- Row
- Dimension size
- 209
- Resolution
- 0.009 degree
- Cell geometry
- Area
- Transformation parameter availability
- No
Distributor
- OnLine resource
- CHARM_LIMALIM_NURS_FYFS_R ( OGC:WMS )
- OnLine resource
-
CHARM web site
(
WWW:LINK
)
CHARM web site
- Protocol
- COPYFILE
- Name
- FYFS_LIMALIM
- Hierarchy level
- Dataset
- Statement
- Between 1977 and 2006, in September, IFREMER conducted French Young Fish Surveys alond the French coasts. This dataset comprises data from four surveys covering different periods (Bay of Veys, 1977-1981; Bay of Seine, 1995-2002; Bay of Somme, 1998-2006; DYFS, 1977-1983). The French YFs taking place in the Bays of Somme and Seine uses a 3 m beam trawl outside of the bays, but a 2 m beam trawl witin the bays. Data have sometimes been standardised to take into account the difference in gear characteristics.
- Description
- Due to data scarcity, it was not possible to produce annual maps of species abundance. These had to be averaged based on their position over all the available period. The resulting averaged dataset was mapped by kriging.Statistical analysis : the statistical distribution of biological data were tested for normality (histograms, skewness, kurtosis). The data were transformed whem skewness value exceeded |1| and/or kurtosis exceeded 1 and if a normalising function that could improve the data distribution was found. Biological variables were measured on scales based on analytical conventions that are unrelated to the natural processes generated them. Therefore, any transformed scale is as appropriate as those on which these data were originally recorded. Geostatistical interpolation : the spatial variation of biological data were analysed using GENSTAT (GENSTAT 7 Committee, 2004), which is a GENeral STATistics package including the main geostatistical tools. It computes experimental variograms, fits these with various authorised mathematical models and uses them to calculate kriged estimates on a fine regular grid (of latitudes and longitudes). The grid of points was 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 spatial distributions and the variations over time for biological data studied in CHARM's area. For legends of maps, approximates od the 5th and the 95th quantiles were used for the minimales and maximales values respectively.
- Description
- FYFS surveys, scientific surveys from IFREMER
- File identifier
- 59b949c0-335b-11df-bae0-005056981ded XML
- Metadata language
- en
- Character set
- UTF8
- Hierarchy level
- Dataset
- Date stamp
- 2020-06-04T00:26:45
- 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