Species and habitats - Limanda limanda - Immature - IBTS annual abundance in January (1980-2010)

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.

Simple

Alternate title
IBTS_species_geostatA
Date ( Publication )
2012-03-14T00:00:00
Identifier
CHARM_LIMALIM0_IBTS_1980-2010
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
Thèmes Sextant ( Theme )
  • /Biological Environment/Species/Fish Species of Commercial Interest
Keywords ( Discipline )
  • Species data set
  • CHARM
  • Limande
  • Dab
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
Eastern English Channel
N
S
E
W
thumbnail


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

Distributor
Ifremer - Centre de Brest
OnLine resource
CHARM_LIMALIM0_IBTS_1980 ( OGC:WMS )

1980

OnLine resource
CHARM_LIMALIM0_IBTS_1981 ( OGC:WMS )

1981

OnLine resource
CHARM_LIMALIM0_IBTS_1982 ( OGC:WMS )

1982

OnLine resource
CHARM_LIMALIM0_IBTS_1983 ( OGC:WMS )

1983

OnLine resource
CHARM_LIMALIM0_IBTS_1984 ( OGC:WMS )

1984

OnLine resource
CHARM_LIMALIM0_IBTS_1985 ( OGC:WMS )

1985

OnLine resource
CHARM_LIMALIM0_IBTS_1986 ( OGC:WMS )

1986

OnLine resource
CHARM_LIMALIM0_IBTS_1987 ( OGC:WMS )

1987

OnLine resource
CHARM_LIMALIM0_IBTS_1988 ( OGC:WMS )

1988

OnLine resource
CHARM_LIMALIM0_IBTS_1989 ( OGC:WMS )

1989

OnLine resource
CHARM_LIMALIM0_IBTS_1990 ( OGC:WMS )

1990

OnLine resource
CHARM_LIMALIM0_IBTS_1991 ( OGC:WMS )

1991

OnLine resource
CHARM_LIMALIM0_IBTS_1992 ( OGC:WMS )

1992

OnLine resource
CHARM_LIMALIM0_IBTS_1993 ( OGC:WMS )

1993

OnLine resource
CHARM_LIMALIM0_IBTS_1994 ( OGC:WMS )

1994

OnLine resource
CHARM_LIMALIM0_IBTS_1995 ( OGC:WMS )

1995

OnLine resource
CHARM_LIMALIM0_IBTS_1996 ( OGC:WMS )

1996

OnLine resource
CHARM_LIMALIM0_IBTS_1997 ( OGC:WMS )

1997

OnLine resource
CHARM_LIMALIM0_IBTS_1998 ( OGC:WMS )

1998

OnLine resource
CHARM_LIMALIM0_IBTS_1999 ( OGC:WMS )

1999

OnLine resource
CHARM_LIMALIM0_IBTS_2000 ( OGC:WMS )

2000

OnLine resource
CHARM_LIMALIM0_IBTS_2001 ( OGC:WMS )

2001

OnLine resource
CHARM_LIMALIM0_IBTS_2002 ( OGC:WMS )

2002

OnLine resource
CHARM_LIMALIM0_IBTS_2003 ( OGC:WMS )

2003

OnLine resource
CHARM_LIMALIM0_IBTS_2004 ( OGC:WMS )

2004

OnLine resource
CHARM_LIMALIM0_IBTS_2005 ( OGC:WMS )

2005

OnLine resource
CHARM_LIMALIM0_IBTS_2006 ( OGC:WMS )

2006

OnLine resource
CHARM_LIMALIM0_IBTS_2007 ( OGC:WMS )

2007

OnLine resource
CHARM_LIMALIM0_IBTS_2008 ( OGC:WMS )

2008

OnLine resource
CHARM_LIMALIM0_IBTS_2009 ( OGC:WMS )

2009

OnLine resource
CHARM_LIMALIM0_IBTS_2010 ( OGC:WMS )

2010

Protocol
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1980
Description
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2010
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. Average and standard deviation maps were computed based on all interpolated maps over all the period studied
Description
IBTS, annual scientific survey of IFREMER
File identifier
fd9b7a07-7b7d-4505-b87a-0a01de54b8ea XML
Metadata language
en
Character set
UTF8
Hierarchy level
Dataset
Date stamp
2020-06-04T00:26:24
Metadata standard name
ISO 19115:2003/19139 - SEXTANT
Metadata standard version
1.0
Point of contact
Ifremer - Erwann Quimbert
 
 

Overviews

overview

Spatial extent

N
S
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thumbnail


Keywords

GEMET - INSPIRE themes, version 1.0
Répartition des espèces
Thèmes Sextant
/Biological Environment/Species/Fish Species of Commercial Interest
external.theme.gemet
ressource halieutique

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