Species and habitats - Trachurus trachurus - All ages - IBTS annual abundance in summer (1991-2010)

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 )
2012-04-02T00:00:00
Identifier
CHARM_TRACTRA_IBTS_1991-2010
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
  • Chinchard commun
  • Atlantic horse mackerel
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
CHARMIII_IBTSQ3_FISH_tractra_q3 ( OGC:WMS )

Mean

OnLine resource
CHARMIII_IBTSQ3_tractra_q3 ( OGC:WMS )

Standard deviation

OnLine resource
CHARMIII_TRACTRA_IBTS_1991 ( OGC:WMS )

1991

OnLine resource
CHARMIII_TRACTRA_IBTS_1992 ( OGC:WMS )

1992

OnLine resource
CHARMIII_TRACTRA_IBTS_1993 ( OGC:WMS )

1993

OnLine resource
CHARMIII_TRACTRA_IBTS_1994 ( OGC:WMS )

1994

OnLine resource
CHARMIII_TRACTRA_IBTS_1995 ( OGC:WMS )

1995

OnLine resource
CHARMIII_TRACTRA_IBTS_1996 ( OGC:WMS )

1996

OnLine resource
CHARMIII_TRACTRA_IBTS_1997 ( OGC:WMS )

1997

OnLine resource
CHARMIII_TRACTRA_IBTS_1998 ( OGC:WMS )

1998

OnLine resource
CHARMIII_TRACTRA_IBTS_1999 ( OGC:WMS )

1999

OnLine resource
CHARMIII_TRACTRA_IBTS_2000 ( OGC:WMS )

2000

OnLine resource
CHARMIII_TRACTRA_IBTS_2001 ( OGC:WMS )

2001

OnLine resource
CHARMIII_TRACTRA_IBTS_2002 ( OGC:WMS )

2002

OnLine resource
CHARMIII_TRACTRA_IBTS_2003 ( OGC:WMS )

2003

OnLine resource
CHARMIII_TRACTRA_IBTS_2004 ( OGC:WMS )

2004

OnLine resource
CHARMIII_TRACTRA_IBTS_2005 ( OGC:WMS )

2005

OnLine resource
CHARMIII_TRACTRA_IBTS_2006 ( OGC:WMS )

2006

OnLine resource
CHARMIII_TRACTRA_IBTS_2007 ( OGC:WMS )

2007

OnLine resource
CHARMIII_TRACTRA_IBTS_2008 ( OGC:WMS )

2008

OnLine resource
CHARMIII_TRACTRA_IBTS_2009 ( OGC:WMS )

2009

OnLine resource
CHARMIII_TRACTRA_IBTS_2010 ( OGC:WMS )

2010

Protocol
COPYFILE
Name
CHARMIII_TRACTRA_IBTS_1991
Description
1991
Protocol
COPYFILE
Name
CHARMIII_TRACTRA_IBTS_1992
Description
1992
Protocol
COPYFILE
Name
CHARMIII_TRACTRA_IBTS_1993
Description
1993
Protocol
COPYFILE
Name
CHARMIII_TRACTRA_IBTS_1994
Description
1994
Protocol
COPYFILE
Name
CHARMIII_TRACTRA_IBTS_1995
Description
1995
Protocol
COPYFILE
Name
CHARMIII_TRACTRA_IBTS_1996
Description
1996
Protocol
COPYFILE
Name
CHARMIII_TRACTRA_IBTS_1997
Description
1997
Protocol
COPYFILE
Name
CHARMIII_TRACTRA_IBTS_1998
Description
1998
Protocol
COPYFILE
Name
CHARMIII_TRACTRA_IBTS_1999
Description
1999
Protocol
COPYFILE
Name
CHARMIII_TRACTRA_IBTS_2000
Description
2000
Protocol
COPYFILE
Name
CHARMIII_TRACTRA_IBTS_2001
Description
2001
Protocol
COPYFILE
Name
CHARMIII_TRACTRA_IBTS_2002
Description
2002
Protocol
COPYFILE
Name
CHARMIII_TRACTRA_IBTS_2003
Description
2003
Protocol
COPYFILE
Name
CHARMIII_TRACTRA_IBTS_2004
Description
2004
Protocol
COPYFILE
Name
CHARMIII_TRACTRA_IBTS_2005
Description
2005
Protocol
COPYFILE
Name
CHARMIII_TRACTRA_IBTS_2006
Description
2006
Protocol
COPYFILE
Name
CHARMIII_TRACTRA_IBTS_2007
Description
2007
Protocol
COPYFILE
Name
CHARMIII_TRACTRA_IBTS_2008
Description
2008
Protocol
COPYFILE
Name
CHARMIII_TRACTRA_IBTS_2009
Description
2009
Protocol
COPYFILE
Name
CHARMIII_TRACTRA_IBTS_2010
Description
2010
Protocol
COPYFILE
Name
CHARMIII_IBTSQ3_FISH_tractra_q3
Description
Mean
Protocol
COPYFILE
Name
CHARMIII_IBTSQ3_tractra_q3
Description
Standard deviation
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 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. 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 Q3 (July, August, September), annual scientific survey of IFREMER
File identifier
a9fff66a-a9b9-4317-bae1-ce9836dbaa30 XML
Metadata language
en
Character set
UTF8
Hierarchy level
Dataset
Date stamp
2020-06-04T00:57:52
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
E
W
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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