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Center for Environment, Fisheries & Aquaculture Science
CHARM Consortium


CHARM consortium

Species and habitats - Raja montagui - All ages Male - Multi-annual abundance in July during BTS (1989-2006)

Type: datasetLicense: not specifiedCategory: environmentScale: 1 / 2500Last update: unknown
Habitats and biotopes

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.

Data origin:

The standard survey has a total of approximately 100 tows or stations (75 are in ICES division VIId,25 are in ICES division Ivc). A commercial 4m beam trawl fitted with a chain mat, flip-up ropes, and a 40 mm cod-end liner is used.The gear is towed at 4 knots (ground speed) for 30 minutes on a warp length appropriate to the depth of water. At each sampling station (only daylight), all the fish species are sorted, weighed, counted and measured.

Purpose: not specified

Data life cycle, according to producer:
Creation date: unknown
Update frequency: as needed
State: completed


CHARM web site

CHARM web site

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