Identification

Title

2007 - 2008 Centre for Environment, Fisheries & Aquaculture Science (Cefas) North Sea CodWatch 2008/09 - Fisheries Science Partnership survey

Alternative title(s)

FSP North Sea CodWatch

Abstract

Data from FSP 2007/09 Programme 18 ‘North Sea Codwatch’, which from April 2007 to March 2009 monitored the status of 1- and 2-year-old cod (Gadus morhua) and also of cod and whiting (Merlangius merlangius) (the latter only from June 2008 on) of all ages in catches in the North Sea made by selected commercial vessels associated with the Eastern England Fish Producers Organisation Ltd (EEFPO). The Programme from June 2008 to March 2009 was part-funded by a grant from Yorkshire Forward.

Resource type

series

Resource locator

http://data.cefas.co.uk/#/View/18236/

function: order

Unique resource identifier

code

CEFAS3cc689cb-7924-44c4-b580-082d05890940

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

SeaDataNet P021 parameter discovery vocabulary

reference date

date type

revision

effective date

2011-03-25

Keyword set

keyword value

originating controlled vocabulary

title

GEMET - INSPIRE themes, version 1.0

reference date

date type

publication

effective date

2008-06-01

Geographic location

West bounding longitude

-6

East bounding longitude

9

North bounding latitude

61.5

South bounding latitude

50

Extent

Extent group

authority code

title

SeaVoX Vertical Co-ordinate Coverages

reference date

date type

revision

effective date

2010-05-18

code identifying the extent

Temporal reference

Temporal extent

Begin position

2007-01-01T00:00:00.000Z

End position

2008-01-01T00:00:00.000Z

Dataset reference date

date type

publication

effective date

2017-02-14

Frequency of update

notPlanned

Quality and validity

Lineage

Twelve fishers with a track record of catching cod were selected by the EEFPO to maximise spatial coverage of the North Sea and to include a wide range of fishing gears and target species. Trip logsheets, designed and formatted by the EEFPO and Cefas, were distributed to all fishers in the project. The logsheets include fields for: • Target species, gear type and dimensions (including mesh size), and quota allocation. • Date, time, a single midpoint lat/long identifier for each tow/haul, target species, hours towed/soak-time. • For each of the three objectives (1-year-old cod, 2-year-old cod, and cod of all ages): a relative estimate by the observing fisher of abundance using a 5-point scale (0 = zero, 1 = small numbers, 2 = moderate numbers, 3 = high numbers, 4 = very high numbers), and an estimate of the quantity (by weight and number) retained and discarded. Fishers were requested to estimate relative abundance using their previous historical knowledge of incoming year classes and of cod fishing in general (the average fishing experience of participating skippers is 30 years). Fishers were provided with guidance by quarter on the expected upper and lower likely lengths of 1- and 2-year-old cod, derived from previous sampling of retained and discarded catches during recent fishing trips attended by observers in the central North Sea. No allowance was made for potential differences in growth rate between different areas of the North Sea, as this was deemed appropriate in order to reduce the complexity of sampling by fishers moving in and out of different fishing areas. Also, no allowance is made for difference in growth rate at age between years. Fishers were provided with fish measuring boards, and guidance was given in the subsampling of large or mixed catches. The distribution and collection of logsheets and the transfer of data onto Excel spreadsheets were carried out by the EEFPO. Fishers were encouraged also to record additional observations they considered relevant to the project.

Conformity

Data format

name of format

version of format

Constraints related to access and use

Constraint set

Use constraints

Contact the Cefas Data Manager for more information

Constraint set

Limitations on public access

Contact the Cefas Data Manager for more information

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

2017-02-14T11:24:16

Metadata language

eng