Identification

Title

1984 - 2010 Centre for Environment, Fisheries & Aquaculture Science (Cefas) Western English Channel Groundfish Survey using Charter Vessels Bogey 1 and Carhelmar, Qtr 4 (FSS: CARHELMAR)

Alternative title(s)

Carhelmar Beam trawl survey

Abstract

This survey series ran from 1984 to 2013. The aim was to provide fisheries independent abundance indices of all age groups of sole and plaice which are used in assessment working groups to tune the ICES stock assessment and to estimate recruitment. The survey was undertaken annually. Fifty eight trawl stations on the main sole grounds in the English waters of the Western English Channel were fished and sampled. Surveys were carried out on chartered commercial fishing vessels with Cefas staff on board. Catches were sorted by starboard and port trawl. All commercial fish and shellfish species were identified either to species level or if not the highest taxa and measured. Non-commercial species were predominately observed, although for a period of the survey-series length distributions were collected for part of each survey. The epi-benthos was observed for the later part of the survey-series. Sole and plaice were biological sampled for age determination purposes, and the collection of individual weights and maturities.

Resource type

series

Resource locator

Unique resource identifier

code

CEFAS14a0e19e-ebc8-4c83-9a0a-fe3952c397a3

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

Additional information source

`http://data.cefas.co.uk/#/View/3930`_ .. _`http://data.cefas.co.uk/#/view/3930`: http://data.cefas.co.uk/#/View/3930

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

East bounding longitude

0

North bounding latitude

52.75

South bounding latitude

49.5

Extent

Extent group

authority code

title

reference date

date type

revision

effective date

2010-05-18

code identifying the 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

1984

End position

2010-10-18T23:00:00.000Z

Dataset reference date

date type

publication

effective date

2020-06-24

Frequency of update

annually

Quality and validity

Lineage

A number of changes to the survey grid, sampling procedure and gear have occurred over time and these are documented by Cefas. Data were originally collected and stored in spreadsheets. All Carhelmar data is stored on the Fishing Survey System (FSS). Biological were samples returned to the laboratory fro processing and age determination as required. Data has been extensively quality checked. When the survey was undertaken by the Carhelmar (survey reference prefixed as CHMR) the catch was processed separately by port and starboard beam, but on a few occasions a catch only from the one side was processed. In 2002 and 2004 the survey was undertaken on the Corystes research vessel, (survey reference prefixed as CORY) but only the one beam was used, however this was rigged with the same gear previously used by the Carhelmar. In 2003 both vessels were used. When the survey was conducted on the Carhelmar, the processing of the catch focused on the commercial species. All commercial fish species were measured. Non-commercial species were not always identified and measured. Benthic observations were made in some of the years from the port side beam. Biological age data were collected for sole and plaice. For more information regarding the availability of data for the survey-series refer to `https://www.cefas.co.uk/publications/techrep/ScienceTechnicalReportNo151.pdf`_ Species and Gear codelists are available via the additional information source field. .. _`https://www.cefas.co.uk/publications/techrep/sciencetechnicalreportno151.pdf`: https://www.cefas.co.uk/publications/techrep/ScienceTechnicalReportNo151.pdf

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

2020-06-24T09:27:49

Metadata language