Identification

Title

Fish biomass and density data for 3 intensively studied Wessex chalkstream sites, England, UK

Abstract

Density and biomass of fish taxa from three chalkstreams in the Wessex chalk area: Nine Mile River, River Till and River Wylye. Data were collected on five occasions, between October 2012 and October 2013. The density of fish taxa at each of the three streams was estimated using benthic fish sampling and multi-pass electrofishing. The mean biomass of individuals of each taxon at each site on each occasion was then applied to the density estimates to derive an estimate of the biomass per m2 of each taxon at each site on each occasion. Data were collected to quantify food webs detailing the flux of mass and nutrients between nodes of the food web. This dataset was created as part of work package 3.2 of the Wessex Biodiversity & Ecosystem Service Sustainability (BESS) project. Full details about this dataset can be found at https://doi.org/10.5285/7eee41f8-dbde-4b5e-b2d5-7296b5bfc558

Resource type

dataset

Resource locator

https://data-package.ceh.ac.uk/sd/7eee41f8-dbde-4b5e-b2d5-7296b5bfc558.zip

name: Supporting information

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

function: information

https://catalogue.ceh.ac.uk/datastore/eidchub/7eee41f8-dbde-4b5e-b2d5-7296b5bfc558/WP3_2_Food_Web_Fish_Community_Density_Biomass.csv

name: Download the data

description: Download a copy of this data

function: download

Unique resource identifier

code

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

codeSpace

doi:

Dataset language

eng

Spatial reference system

code identifying the spatial reference system

Classification of spatial data and services

Topic category

biota

Keywords

Keyword set

keyword value

Environmental Monitoring Facilities

originating controlled vocabulary

title

GEMET - INSPIRE themes, version 1.0

reference date

date type

publication

effective date

2008-06-01

Keyword set

keyword value

Wessex BESS

Geographic location

West bounding longitude

-2.981

East bounding longitude

-0.985

North bounding latitude

51.661

South bounding latitude

50.525

Temporal reference

Temporal extent

Begin position

2012-10-01

End position

2013-10-31

Dataset reference date

date type

publication

effective date

2017-06-26

date type

creation

effective date

2013-10-31

Frequency of update

notPlanned

Quality and validity

Lineage

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.

Conformity

Conformity report

specification

title

Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services

reference date

date type

publication

effective date

2010-12-08

degree

explanation

Data format

name of format

Comma-separated values (CSV)

version of format

Constraints related to access and use

Constraint set

Limitations on public access

Constraint set

Limitations on public access

Constraint set

Limitations on public access

Constraint set

Limitations on public access

Constraint set

Limitations on public access

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

custodian

Metadata on metadata

Metadata point of contact

organisation name

Environmental Information Data Centre

full postal address

Lancaster Environment Centre, Library Avenue, Bailrigg

Lancaster

LA1 4AP

email address

info@eidc.ac.uk

responsible party role

pointOfContact

Metadata date

2022-05-20T10:40:52

Metadata language

eng