CEFAS855902b3-57f4-478e-9b4e-5aa8c247d358
English
dataset
Centre for Environment, Fisheries & Aquaculture Science
Data Manager
+44 (0)1502 562244
Cefas Lowestoft Laboratory
Pakefield Road
Lowestoft
Suffolk
NR33 0HT
UK
data.manager@cefas.co.uk
pointOfContact
2020-01-13T14:49:40
MEDIN Discovery Metadata Standard
Version 2.3.7
urn:ogc:def:crs:EPSG::4326
OGP
2007 - 2010 Centre for Environment, Fisheries & Aquaculture Science (Cefas) 2007-2010 English Channel Crab Tagging Programme
Crab Tagging
2020-01-13
publication
CEFAS855902b3-57f4-478e-9b4e-5aa8c247d358
http://www.cefas.co.uk/
This project applied data storage tags (DSTs) and double T-bar tags to edible
crabs ( *Cancer pagurus* ) to obtain data that describe and quantify crab
movements, growth, mortality and behaviour in the English Channel and Celtic
Sea.
Centre for Environment, Fisheries & Aquaculture Science
Data Manager
+44 (0)1502 562244
Cefas Lowestoft Laboratory
Pakefield Road
Lowestoft
Suffolk
NR33 0HT
UK
data.manager@cefas.co.uk
originator
Centre for Environment, Fisheries & Aquaculture Science
Data Manager
+44 (0)1502 562244
Cefas Lowestoft Laboratory
Pakefield Road
Lowestoft
Suffolk
NR33 0HT
UK
data.manager@cefas.co.uk
custodian
notPlanned
Delimited
NDGO0005
Fish
Fish behaviour
Fisheries
SeaDataNet P021 parameter discovery vocabulary
2011-03-25
revision
Benthos
Crustacean
Shellfish
Management
Population dynamics
Stock (biological)
Coastal environment
Sea bed
Species
GEMET, version 1.0
2008-06-01
publication
Species distribution
GEMET - INSPIRE themes, version 1.0
2008-06-01
publication
Public data (Crown Copyright) - Open Government Licence Terms and Conditions apply
otherRestrictions
Public data (Crown Copyright) - Open Government Licence Terms and Conditions apply
1000
English
biota
SeaVoX Vertical Co-ordinate Coverages
2010-05-18
revision
Benthic boundary
-7.5
2
47.5
51.25
2007-10-01
2010-12-31
http://data.cefas.co.uk/#/View/546/order
dataset
Release data is considered accurate. Some geographic and size recapture data
is of variable quality. Some recaptures were returned after the end of the
project.
In total, 144 DST tagged crabs (128 female, 16 male) were released at 5
different sites of which 49 were recovered after between 8 and 575 days at
liberty (17-40% return rate). Fifty percent of DST recaptures occurred during
the first 40 days after release and 80% within 120 days, but thereafter the
seasonality of crab behaviour and fisheries became apparent with low
occurrences of recaptures over the winter and more in the subsequent summer
and autumn fishing seasons.
Over 15,000 crabs (mainly females) were tagged and released using double T-bar
tags at 11 locations in the English Channel and Celtic Sea. Nearly 2,500 crabs
were reported as recaptured, a return rate of 16%, very similar to that
obtained in a programme carried out during the 1970s, but substantially lower
than for DSTs. Return rates varied widely between locations and were very high
immediately after release with 56% of recaptures in the first month and 97%
during the first year. The overall pattern of movements was very similar to
that obtained by Bennett & Brown(1983) with striking long distance movements
by female crabs in a westerly or south-westerly direction. Movements of
recaptured male crabs included directional components in a NW, W and SW
direction, but proportionally more local and undirected movements.