Species and habitats - Clupea harengus - Mature - 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

Autres appellations ou acronymes
IBTS_species_geostatA
Date ( Publication )
2012-04-02T00:00:00
Identificateur
CHARM_CLUPHAR1_IBTS_1991-2010
Forme de la présentation
Carte numérique
Autres informations de référence
Source CHARM Consortium
Reconnaissance
IFREMER
Reconnaissance
CHARM consortium
Etat
Finalisé
Fournisseur
Ifremer - Franck Coppin
Gestionnaire
CHARM Consortium - CHARM Consortium
Fréquence de mise à jour
Lorsque nécessaire
Thèmes Sextant ( Thème )
  • /Biological Environment/Species/Fish Species of Commercial Interest
Mots clés ( Discipline )
  • Species data set
  • CHARM
  • Hareng commun
  • Atlantic herring
GEMET - INSPIRE themes, version 1.0 ( Thème )
  • Répartition des espèces
external.theme.gemet ( Thème )
  • ressource halieutique
Limitation d'utilisation
research-only
Contraintes d'accès
Licence
Autres contraintes
Has to be cited this way in maps : "Source CHARM Consortium"
Autres contraintes
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"
Type de représentation spatiale
Raster
Dénominateur de l'échelle
2500
Langue
fr
Langue
en
Jeu de caractères
Utf8
Catégorie ISO
  • Océans
  • Biote
  • Environnement
Description de l'environnement de travail
Microsoft Windows XP ; ESRI ArcGIS 9.x
Identifiant géographique
Eastern English Channel
N
S
E
W


Date de début
1989-01-01
Date de fin
2007-12-31
Nom du système de référence
WGS 84 (EPSG:4326)
Dimensions
2
Noms des axes
Axe - X
Nombre de pixel
768
Résolution
0.009  degree
Noms des axes
Axe - Y
Nombre de pixel
660
Résolution
0.009  degree
Type de raster
Surface
Disponibilité des paramètres de transformation
Non

Distributeur

Distributeur
Ifremer - Centre de Brest
Ressource en ligne
CHARMIII_IBTSQ3_FISH_cluphar1_q3 ( OGC:WMS )

Mean

Ressource en ligne
CHARMIII_IBTSQ3_cluphar1_q3 ( OGC:WMS )

Standard deviation

Ressource en ligne
CHARMIII_CLUPHAR0_IBTS_1991 ( OGC:WMS )

1991

Ressource en ligne
CHARMIII_CLUPHAR0_IBTS_1992 ( OGC:WMS )

1992

Ressource en ligne
CHARMIII_CLUPHAR0_IBTS_1993 ( OGC:WMS )

1993

Ressource en ligne
CHARMIII_CLUPHAR0_IBTS_1994 ( OGC:WMS )

1994

Ressource en ligne
CHARMIII_CLUPHAR0_IBTS_1995 ( OGC:WMS )

1995

Ressource en ligne
CHARMIII_CLUPHAR0_IBTS_1996 ( OGC:WMS )

1996

Ressource en ligne
CHARMIII_CLUPHAR0_IBTS_1997 ( OGC:WMS )

1997

Ressource en ligne
CHARMIII_CLUPHAR0_IBTS_1998 ( OGC:WMS )

1998

Ressource en ligne
CHARMIII_CLUPHAR0_IBTS_1999 ( OGC:WMS )

1999

Ressource en ligne
CHARMIII_CLUPHAR0_IBTS_2000 ( OGC:WMS )

2000

Ressource en ligne
CHARMIII_CLUPHAR0_IBTS_2001 ( OGC:WMS )

2001

Ressource en ligne
CHARMIII_CLUPHAR0_IBTS_2002 ( OGC:WMS )

2002

Ressource en ligne
CHARMIII_CLUPHAR0_IBTS_2003 ( OGC:WMS )

2003

Ressource en ligne
CHARMIII_CLUPHAR0_IBTS_2004 ( OGC:WMS )

2004

Ressource en ligne
CHARMIII_CLUPHAR0_IBTS_2005 ( OGC:WMS )

2005

Ressource en ligne
CHARMIII_CLUPHAR0_IBTS_2006 ( OGC:WMS )

2006

Ressource en ligne
CHARMIII_CLUPHAR0_IBTS_2007 ( OGC:WMS )

2007

Ressource en ligne
CHARMIII_CLUPHAR0_IBTS_2008 ( OGC:WMS )

2008

Ressource en ligne
CHARMIII_CLUPHAR0_IBTS_2009 ( OGC:WMS )

2009

Ressource en ligne
CHARMIII_CLUPHAR0_IBTS_2010 ( OGC:WMS )

2010

Niveau
Jeu de données
Généralités sur la provenance
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
Identifiant de la fiche
d1537e70-905a-4f72-aca1-08c5e47a20eb XML
Langue
en
Jeu de caractères
Utf8
Type de ressource
Jeu de données
Date des métadonnées
2020-06-04T00:28:57
Nom du standard de métadonnées
ISO 19115:2003/19139 - SEXTANT
Version du standard de métadonnées
1.0
Point de contact
Ifremer - Erwann Quimbert
 
 

Aperçus

Étendue spatiale

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Mots clés

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

Fourni par

Ressources associées

Not available