Identification

Title

2007 - 2010 Centre for Environment, Fisheries & Aquaculture Science (Cefas) 2007-2010 English Channel Crab Tagging Programme

Alternative title(s)

Crab Tagging

Abstract

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.

Resource type

dataset

Resource locator

http://data.cefas.co.uk/#/View/546/

function: order

Unique resource identifier

code

CEFAS855902b3-57f4-478e-9b4e-5aa8c247d358

codeSpace

http://www.cefas.co.uk/

Dataset language

eng

Spatial reference system

authority code

OGP

code identifying the spatial reference system

urn:ogc:def:crs:EPSG::4326

Classification of spatial data and services

Topic category

biota

Keywords

Keyword set

keyword value

Keyword set

keyword value

originating controlled vocabulary

title

reference date

date type

revision

effective date

2011-03-25

Keyword set

keyword value

originating controlled vocabulary

title

reference date

date type

publication

effective date

2008-06-01

Keyword set

keyword value

originating controlled vocabulary

title

reference date

date type

publication

effective date

2008-06-01

Geographic location

West bounding longitude

-7.5

East bounding longitude

2

North bounding latitude

51.25

South bounding latitude

47.5

Extent

Extent group

authority code

title

reference date

date type

revision

effective date

2010-05-18

code identifying the extent

Temporal reference

Temporal extent

Begin position

2007-10-01

End position

2010-12-31

Dataset reference date

date type

publication

effective date

2020-01-13

Frequency of update

notPlanned

Quality and validity

Lineage

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.

Conformity

Data format

name of format

version of format

Constraints related to access and use

Constraint set

Use constraints

Public data (Crown Copyright) - Open Government Licence Terms and Conditions apply

Constraint set

Limitations on public access

Public data (Crown Copyright) - Open Government Licence Terms and Conditions apply

Responsible organisations

Responsible party

contact position

Data Manager

organisation name

Centre for Environment, Fisheries & Aquaculture Science

full postal address

Cefas Lowestoft Laboratory

Pakefield Road

Lowestoft

NR33 0HT

UK

telephone number

+44 (0)1502 562244

email address

data.manager@cefas.co.uk

responsible party role

originator

Responsible party

contact position

Data Manager

organisation name

Centre for Environment, Fisheries & Aquaculture Science

full postal address

Cefas Lowestoft Laboratory

Pakefield Road

Lowestoft

NR33 0HT

UK

telephone number

+44 (0)1502 562244

email address

data.manager@cefas.co.uk

responsible party role

custodian

Metadata on metadata

Metadata point of contact

contact position

Data Manager

organisation name

Centre for Environment, Fisheries & Aquaculture Science

full postal address

Cefas Lowestoft Laboratory

Pakefield Road

Lowestoft

NR33 0HT

UK

telephone number

+44 (0)1502 562244

email address

data.manager@cefas.co.uk

responsible party role

pointOfContact

Metadata date

2020-01-13T14:49:40

Metadata language