Identification

Title

2003 - 2003 Centre for Environment, Fisheries & Aquaculture Science (Cefas) Whitefish bycatch in sandeel fishing areas 2003/04 - Fisheries Science Partnership

Alternative title(s)

FSP Whitefish bycatch in sandeel fishing areas

Abstract

Survey to measure the whitefish bycatch taken by a 16mm commercial sandeel net, fished at a time when juvenile gadoids could be settling around the Dogger Bank.

Resource type

dataset

Resource locator

http://data.cefas.co.uk/#/View/615/

function: order

Unique resource identifier

code

CEFASf98fd13a-be52-423e-a679-ba9abe49cb5a

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

Geographic location

West bounding longitude

1

East bounding longitude

3

North bounding latitude

53.75

South bounding latitude

53

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

2003-07-03T00:00:00.000Z

End position

2003-07-28T00:00:00.000Z

Dataset reference date

date type

publication

effective date

2017-02-14

Frequency of update

unknown

Quality and validity

Lineage

Sandeels are small, eel-shaped fish which require a fine mesh (<16mm) in order to retain them, thus increasing the probability that young fish of non-target species (including cod, haddock and whiting) could also be caught. The EU Technical Conservation Regulation restricts the fish by-catch to 5% by weight of all marine organisms on board, but a low weight of whitefish could still contain a significant number of young whitefish. Compliance with the EU Regulation is monitored by Danish and Norwegian authorities at the ports, where a sub-sample of the landing is taken and analysed for species composition, whilst monitoring at sea is carried out bym national inspectors, including those of the UK. It is possible that the effectiveness of port-based monitoring could be compromised by spoilage of small gadoid by-catches in the hold, and that monitoring at sea could be compromised by spatial patchiness, so there has been concern within the UK industry that the official by-catch data may not reflect the true extent of by-catches. This project therefore aimed to observe and record on a haul by haul basis the catch composition obtained when fishing a small meshed sandeel net at a time of the year when young whitefish of the year could conceivably be present in significant numbers on sandeel grounds. Some hauls were also carried out on nearby whitefish grounds using both a whitefish trawl and the sandeel trawl. The project used an English whitefish trawler, the Jubilee Quest, a relatively low power (465 hp) vessel of 22 m rigged with a commercially-manufactured 16 mm 3 mesh sandeel net made for the purpose in Denmark, or with the vessel’s own whitefish trawl with 100 mm cod-end. Two trips were undertaken, from 3-12 July and from 17-28 July, when 0-group gadoids might be present. Based on satellite records and other sandeel fishing information, the area of operation was chosen to be the western Dogger, and then further south on The Hills FSP Project 1, Undertaken in July 2003 with a fine-meshed net on sandeel grounds in the north-east Dogger Bank area of the North Sea.

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

2017-02-14T10:26:41

Metadata language