Date (Publication)

2017-06-26

Date (Creation)

2013-10-31

Identifier

https://catalogue.ceh.ac.uk/id/7eee41f8-dbde-4b5e-b2d5-7296b5bfc558

Identifier

doi: / 10.5285/7eee41f8-dbde-4b5e-b2d5-7296b5bfc558

Other citation details

Jones, J.I., Arnold, A., Pretty, J., Duerdoth, C., Murphy, J., Hawczak, A., Scott, L., Lauridsen, R., Beaumont, W. (2017). Fish biomass and density data for 3 intensively studied Wessex chalkstream sites, England, UK. NERC Environmental Information Data Centre 10.5285/7eee41f8-dbde-4b5e-b2d5-7296b5bfc558

Maintenance and update frequency

notPlanned Not planned

GEMET - INSPIRE themes, version 1.0

• Environmental Monitoring Facilities

Access constraints

otherRestrictions Other restrictions

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Registration is required to access this data

Use constraints

otherRestrictions Other restrictions

Other constraints

This resource is made available under the terms of the Open Government Licence

Use constraints

otherRestrictions Other restrictions

Other constraints

© Queen Mary University of London

Use constraints

otherRestrictions Other restrictions

Other constraints

© Game and Wildlife Conservation Trust

Use constraints

otherRestrictions Other restrictions

Other constraints

If you reuse this data, you should cite: Jones, J.I., Arnold, A., Pretty, J., Duerdoth, C., Murphy, J., Hawczak, A., Scott, L., Lauridsen, R., Beaumont, W. (2017). Fish biomass and density data for 3 intensively studied Wessex chalkstream sites, England, UK. NERC Environmental Information Data Centre https://doi.org/10.5285/7eee41f8-dbde-4b5e-b2d5-7296b5bfc558

Spatial representation type

textTable Text, table

Metadata language

EnglishEnglish

Character set

utf8 UTF8

Topic category

• Biota

Begin date

2012-10-01

End date

2013-10-31

Unique resource identifier

OSGB 1936 / British National Grid

Distribution format

• Comma-separated values (CSV) ()

OnLine resource

Supporting information

Supporting information available to assist in re-use of this dataset

OnLine resource

Download the data

Download a copy of this data

Hierarchy level

dataset Dataset

Other

dataset

Statement

Samples were collected on five separate occasions from the three sites. Sampling did not occur during the salmonid breeding season, December to March, so as not to disturb redds. Protocols and standard procedures were strictly followed for benthic fish sampling and electrofishing but there was no formal quality assurance procedure, such as repeat surveying of the same reach on a different day within the same sampling period. Electrofishing was undertaken by fully qualified and very experienced fish biologists (Bill Bellamy and Luke Scott) from the Game and Wildlife Conservation Trust. Fish populations were assessed by multi-pass electrofishing. Population density estimates were derived using the the Zippin maximum likelihood method (Zippin, 1958). As electrofishing is not particularly effective at catching certain benthic species e.g. bullheads, stone loach, we used a modified Hess sampler (0.12 m2) to assess populations of these species, deployed 20 times on each date, using a stratified-random regime. The mean biomass of individuals of each taxa captured at each site on each occassion was determined using length-mass regressions, and multiplied by the density estimate to derive a biomass estimate.

File identifier

7eee41f8-dbde-4b5e-b2d5-7296b5bfc558 XML

Metadata language

EnglishEnglish

Character set

ISO/IEC 8859-1 (also known as Latin 1) 8859 Part 1

Hierarchy level

dataset Dataset

Hierarchy level name

dataset

Date stamp

2024-02-08T17:34:00

Metadata standard name

UK GEMINI

Metadata standard version

2.3