2001 - 2001 Centre for Environment, Fisheries & Aquaculture Science (Cefas) Environmental correlates of large-scale spatial variation in the Delta13C of marine animals
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.
dataset
http://data.cefas.co.uk/#/View/2989/
function: order
CEFASb35fae1f-7398-4394-ab34-6be28efb0492
http://www.cefas.co.uk/
eng
OGP
urn:ogc:def:crs:EPSG::4326
biota
revision
2011-03-25
publication
2008-06-01
publication
2008-06-01
-7
9
61.5
49.5
revision
2010-05-18
2001-07-26
2001-09-29
publication
2020-09-28
notPlanned
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.
Public data (Crown Copyright) - Open Government Licence Terms and Conditions apply
Public data (Crown Copyright) - Open Government Licence Terms and Conditions apply
Data Manager
Centre for Environment, Fisheries & Aquaculture Science
Cefas Lowestoft Laboratory
Pakefield Road
Lowestoft
NR33 0HT
UK
+44 (0)1502 562244
originator
Data Manager
Centre for Environment, Fisheries & Aquaculture Science
Cefas Lowestoft Laboratory
Pakefield Road
Lowestoft
NR33 0HT
UK
+44 (0)1502 562244
custodian
Data Manager
Centre for Environment, Fisheries & Aquaculture Science
Cefas Lowestoft Laboratory
Pakefield Road
Lowestoft
NR33 0HT
UK
+44 (0)1502 562244
pointOfContact
2020-09-28T10:25:07