CEFASb35fae1f-7398-4394-ab34-6be28efb0492
English
dataset
Centre for Environment, Fisheries & Aquaculture Science
Data Manager
+44 (0)1502 562244
Cefas Lowestoft Laboratory
Pakefield Road
Lowestoft
Suffolk
NR33 0HT
UK
data.manager@cefas.co.uk
pointOfContact
2020-09-28T10:25:07
MEDIN Discovery Metadata Standard
Version 2.3.7
urn:ogc:def:crs:EPSG::4326
OGP
2001 - 2001 Centre for Environment, Fisheries & Aquaculture Science (Cefas) Environmental correlates of large-scale spatial variation in the Delta13C of marine animals
2020-09-28
publication
CEFASb35fae1f-7398-4394-ab34-6be28efb0492
http://www.cefas.co.uk/
Carbon stable isotopes can be used to trace the sources of energy supporting
food chains and to estimate the contribution of different sources to a
consumer's diet. However, the δ13C signature of a consumer is not sufficient
to infer source without an appropriate isotopic baseline, because there is no
way to determine if differences in consumer δ13C reflect source changes or
baseline variation. Describing isotopic baselines is a considerable challenge
when applying stable isotope techniques at large spatial scales and/or to
interconnected food chains in open marine environments. One approach is to use
filter-feeding consumers to integrate the high frequency and small-scale
variation in the isotopic signature of phytoplankton and provide a surrogate
baseline, but it can be difficult to sample a single consumer species at large
spatial scales owing to rarity and/or discontinuous distribution. Here, we use
the isotopic signature of a widely distributed filter-feeder the queen scallop
( *Aequipecten opercularis* ) in the north-eastern Atlantic to develop a
model linking base δ13C to environmental variables. Data includes catch data,
isotope analysis data, environmental data and associated positional data.
Centre for Environment, Fisheries & Aquaculture Science
Data Manager
+44 (0)1502 562244
Cefas Lowestoft Laboratory
Pakefield Road
Lowestoft
Suffolk
NR33 0HT
UK
data.manager@cefas.co.uk
originator
Centre for Environment, Fisheries & Aquaculture Science
Data Manager
+44 (0)1502 562244
Cefas Lowestoft Laboratory
Pakefield Road
Lowestoft
Suffolk
NR33 0HT
UK
data.manager@cefas.co.uk
custodian
notPlanned
Delimited
NDGO0005
Isotopes
Fish
Fisheries
Shellfish abundance and biomass in water bodies
SeaDataNet P021 parameter discovery vocabulary
2011-03-25
revision
Shellfish
GEMET, version 1.0
2008-06-01
publication
Habitats and biotopes
Species distribution
GEMET - INSPIRE themes, version 1.0
2008-06-01
publication
Public data (Crown Copyright) - Open Government Licence Terms and Conditions apply
otherRestrictions
Public data (Crown Copyright) - Open Government Licence Terms and Conditions apply
English
biota
SeaVoX Vertical Co-ordinate Coverages
2010-05-18
revision
Benthic boundary
-7
9
49.5
61.5
2001-07-26
2001-09-29
http://data.cefas.co.uk/#/View/2989/order
dataset
Scallops, dab ( *Limanda limanda* ) and whiting ( *Merlangus merlangius* )
were caught with a Grande Ouverture Verticale (GOV) demersal trawl and 2m or
4m beam trawls. Stations in the North Sea, Celtic Sea and English Channel were
fished using the standard protocols for fisheries surveys. The GOV and 4m beam
trawls were fitted wih a cod-end of 20mm stretched mesh and the 2m beam trawl
was fitted with a cod-end of 4mm stretched mesh.
At each site, up to 7 scallops were selected at random from all individuals
with a shell height of 50-60mm. They were weighed to 0.1g and immediatedly
frozen to -30°C. Up to 3 dab and 3 whiting were also retained: dab were
selected between 190 and 210mm and whiting between 240 and 260mm. Each fish
was weighed to the nearest g and measured to the nearest mm.