2004 Strategic Environmental Assessment SEA5 Technical Report - Cephalopods (North Sea)

This report is a contribution to the Strategic Environmental Assessment (SEA5) conducted by the Department of Trade and Industry (now Department of Energy and Climate Change). Cephalopods are short-lived molluscs, characterised by rapid growth rates, and are important predators and prey in oceanic and neritic environments. They can range in size from 1.5 cm in pygmy squid (Sepiolidae) to 20 m in giant squid (Architheutidae). Cephalopods exhibit the highest degree of development in invertebrate nervous systems, expressed through complex behaviour patterns such as the ability to learn and the display of complex colour changes. In contrast to other molluscs, most cephalopods lack an external shell, are highly mobile as adults and occupy similar ecological niches to predatory fish. This report focuses mainly on the species of fishery importance: the loliginid squid Loligo forbesi and the ommastrephid squid Todarodes sagittatus and Todaropsis eblanae together with the octopus Eledone cirrhosa. Brief accounts of other commonly occurring cephalopod species are also provided.

Simple

Date (Publication)
2004-01-01
Citation identifier
British Geological Survey / BGS_SEA_64
Point of contact
Organisation name Individual name Electronic mail address Role

British Geological Survey (BGS)

Paul Henni

offshoredata@bgs.ac.uk

Custodian

Department for Energy and Climate Change (DECC)

enquiries@decc.gsi.gov.uk

Originator
Maintenance and update frequency
Not planned
Resource format
Name Version

Documents
Keywords

SeaDataNet Parameter Discovery Vocabulary

GEMET - INSPIRE themes, version 1.0

  • Species distribution

SeaVoX Vertical Co-ordinate Coverages
Use limitation

The SEAs data were produced as part of the UK Department of Energy and Climate Change's Offshore Energy Strategic Environmental Assessment programme; Crown Copyright, all rights reserved. The DECC SEA must be acknowledged in any maps or publications that make use of the data. All the data files are freely available to the public. The Strategic Environmental Assessment (SEA) data portal provides free access to available data and reports which have been produced through the SEA process. The site is run and managed by BGS on behalf of the Department of Energy and Climate Change (DECC). Many files can be downloaded directly from this website. Those that are too large to download can be ordered via the website for postal delivery from BGS. BGS (NERC) has been contracted by DECC to publish SEA datasets on its behalf. All intellectual property rights (including , without limitation, copyrights, database rights and all other rights which subsist or may at any time in the future subsist in the Dataset(s)) in the Dataset(s) ('Intellectual Property Rights') are owned by DECC (formerly the Department of Trade and Industry, and the Department for Business, Enterprise and Regulatory Reform). BGS has been authorised by DECC to use SEA datasets for all purposes but on a 'not-for-profit basis'. BGS has been authorised by DECC to pass on SEA datasets to third parties so that they can use them for all purposes but on a 'not-for-profit' basis.

Access constraints
Intellectual property rights
Distance
5  m
Language
English
Topic category
  • Biota
  • Environment
  • Oceans
Title

SeaVoX salt and fresh water body gazetteer
Date (Revision)
2006-01-01
Code
North Sea
N
S
E
W
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Begin date
2004-01-01
End date
2004-01-01
Supplemental Information

http://www.offshore-sea.org.uk/site/index.php

Reference system identifier
OGP / urn:ogc:def:crs:EPSG::4326
Distribution format
    OnLine resource
    Protocol Linkage Name
    http://www.bgs.ac.uk/data/sea/home.html

    Strategic Environmental Assessment (SEA) data portal
    Hierarchy level
    Dataset
    Statement

    As part of the UK Department of Energy and Climate Change's Offshore Energy Strategic Environmental Assessment programme this report was prepared by Gabriele Stowasser, Graham J Pierce, Jianjun Wang and M Begona Santos of the Department of Zoology, University of Aberdeen. Some of the general background material presented here is taken from the reports on cephalopods in the SEA 2 and 3 and SEA 4 areas (Pierce et al., 2002, Pierce et al.,

    2003). Data on cephalopod landings from the ICES area are compiled by the ICES Working Group on Cephalopod Fisheries and Life History (WGCEPH) (e.g. Anon., 2003). However, these compilations are based on ICES fisheries sub-divisions, with the SEA 5 area covering only the western part of major fisheries subdivision

    Iva and Ivb in the North Sea. Thus trends for the SEA 5 area have been reconstructed by reference to the source fishery databases. General patterns in cephalopod landings can be inferred from data presented in the WGCEPH report (Anon., 2003). Fishery data provide the best available information on cephalopod distribution and abundance. Since most cephalopods are landed in the UK as a by-catch of trawling, landings per unit effort (LPUE) can be used as an index of species abundance (see Pierce et al., 1994d) and such data are available on a monthly, by ICES rectangle, basis.

    Metadata

    File identifier
    aba64100-c134-4de3-e044-0003ba6f30bd XML
    Metadata language
    English
    Hierarchy level
    Dataset
    Date stamp
    2011-08-30
    Metadata standard name

    MEDIN Discovery Metadata Standard
    Metadata standard version

    Version 2.3.5
    Metadata author
    Organisation name Individual name Electronic mail address Role

    British Geological Survey (BGS)

    Mary Mowat

    offshoredata@bgs.ac.uk

    		Point of contact
     
     

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