Identification

Title

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

https://data.cefas.co.uk/view/546

name: Cefas Data Portal

description: The Cefas Data Portal contains metadata records and data sets available to download and connect to in support of our commitment to open science. Data is available in the following formats: Binary download, CSV, ESRI Shapefile. The data can also be accessed via the WFS and WMS protocols.

function: download

Unique resource identifier

code

CEFAS546

codeSpace

https://data.cefas.co.uk

Dataset language

eng

Spatial reference system

code identifying the spatial reference system

Classification of spatial data and services

Topic category

biota

Keywords

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

revision

effective date

2011-03-25

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

revision

effective date

2010-05-18

Keyword set

keyword value

originating controlled vocabulary

title

reference date

date type

publication

effective date

2012-01-11

Keyword set

keyword value

originating controlled vocabulary

title

reference date

date type

publication

effective date

2012-01-11

Geographic location

West bounding longitude

-7.50

East bounding longitude

2.00

North bounding latitude

51.25

South bounding latitude

47.50

Temporal reference

Temporal extent

Begin position

2007-10-01

End position

2010-12-31

Dataset reference date

date type

publication

effective date

2013-11-06

date type

revision

effective date

2023-10-06

date type

creation

effective date

2012-08-29

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

Conformity report

specification

title

reference date

date type

publication

effective date

2013-12-10

degree

false

explanation

See the referenced specification

Conformity report

specification

title

reference date

date type

publication

effective date

2010-12-08

degree

true

explanation

See the referenced specification

Data format

name of format

Unknown

version of format

Constraints related to access and use

Constraint set

Limitations on public access

Constraint set

Limitations on public access

Responsible organisations

Responsible party

organisation name

Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS)

full postal address

Cefas Lowestoft Laboratory

Pakefield Road

Lowestoft

NR33 0HT

UK

email address

data.manager@cefas.co.uk

responsible party role

originator

Responsible party

organisation name

Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS)

full postal address

Cefas Lowestoft Laboratory

Pakefield Road

Lowestoft

NR33 0HT

UK

email address

data.manager@cefas.co.uk

responsible party role

custodian

Responsible party

organisation name

Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS)

full postal address

Cefas Lowestoft Laboratory

Pakefield Road

Lowestoft

NR33 0HT

UK

email address

data.manager@cefas.co.uk

responsible party role

distributor

Responsible party

organisation name

Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS)

email address

data.manager@cefas.co.uk

responsible party role

owner

Responsible party

organisation name

Department for Environment, Food and Rural Affairs (DEFRA)

email address

defra.helpline@defra.gov.uk

responsible party role

owner

Metadata on metadata

Metadata point of contact

organisation name

Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS)

full postal address

Cefas Lowestoft Laboratory

Pakefield Road

Lowestoft

NR33 0HT

UK

email address

data.manager@cefas.co.uk

responsible party role

pointOfContact

Metadata date

2023-10-06T10:39:20

Metadata language