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Species and habitats - Pecten maximus- Multi-annual Abundance in October - CGFS (2007-2009)

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.
 
Citation proposal
CHARM Consortium (CHARM Consortium) (2012) . Species and habitats - Pecten maximus- Multi-annual Abundance in October - CGFS (2007-2009). https://services.mspdata.eu:/geonetwork/srv/api/records/94a40dc6-91d7-463c-aab0-69db52a0f866

Simple

Alternate title
CGFS_species_geostatP
Date ( Publication )
2012-01-26T00:00:00
Identifier
CHARM_PECTMAX_CGFS_2007-2009
Presentation form
Digital map
Other citation details
Source CHARM Consortium
Credit
IFREMER
Credit
CHARM consortium
Status
Completed

  Resource provider

Ifremer - Franck Coppin  

  Custodian

CHARM Consortium - CHARM Consortium  

Maintenance and update frequency
As needed
Keywords ( Discipline )
  • Species data set , CHARM , Coquille Saint jacques , Scallop
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
French
Metadata language
English
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


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
false

Distributor

  Distributor

Ifremer - Centre de Brest  

Name
Version
Protocol
COPYFILE
Name
Pecten maximus
Description
Pecten maximus
OnLine resource
CHARMIII_PECTMAX_CGFS2007_2009  
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
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 experimentala 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
CGFS, annual scientific survey of IFREMER

Metadata

File identifier
94a40dc6-91d7-463c-aab0-69db52a0f866   XML
Metadata language
English
Character set
UTF8
Hierarchy level
Dataset
Date stamp
2020-06-04T00:29:05
Metadata standard name
ISO 19115:2003/19139 - SEXTANT
Metadata standard version
1.0

  Point of contact

Ifremer - Erwann Quimbert  

 
 

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