FN Archimer Export Format
PT J
TI Diet consistency but large-scale isotopic variations in a deep-sea shark: The case of the velvet belly lantern shark, Etmopterus spinax, in the northeastern Atlantic region and Mediterranean Sea
BT 
AF Besnard, Lucien
   Duchatelet, Laurent
   Bird, Christopher S.
   Le Croizier, Gaël
   Michel, Loic
   Pinte, Nicolas
   Lepoint, Gilles
   Schaal, Gauthier
   Vieira, Rui P.
   Gonçalves, Jorge M.S.
   Martin, Ulrich
   Mallefet, Jérôme
AS 1:1;2:2;3:3;4:4;5:5;6:2;7:6;8:1;9:3;10:7;11:2;12:2;
FF 1:;2:;3:;4:;5:PDG-REM-BEEP-LEP;6:;7:;8:;9:;10:;11:;12:;
C1 Univ Brest, CNRS, IRD, Ifremer, LEMAR, F-29280, Plouzane, France
   University of Louvain - UCLouvain, Earth and Life Institute, Marine Biology Laboratory, Croix du Sud 3, 1348, Louvain-la-Neuve, Belgium
   Centre for Environment, Fisheries, & Aquaculture Sciences (CEFAS), Pakefield Road, Lowestoft, UK
   UMR Géosciences Environnement Toulouse (GET), Observatoire Midi Pyrénées (OMP), 14 Avenue Edouard Belin, 31400, Toulouse, France
   Univ Brest, Ifremer, CNRS, Unité Biologie et Ecologie des Ecosystèmes marins Profonds (BEEP), F-29280, Plouzane, France
   University of Liège (ULg), Laboratoire d'Ecologie trophique et isotopique (LETIS), B6 Sart Tilman, 4000, Liège, Belgium
   CCMAR - Centro de Ciências do Mar, Universidade do Algarve, 8005-139, Faro, Portugal
C2 UBO, FRANCE
   UNIV CATHOLIC LOUVAIN, BELGIUM
   CEFAS, UK
   OBSERV MIDI PYRENEES, FRANCE
   IFREMER, FRANCE
   UNIV LIEGE (ULG), BELGIUM
   CCMAR, PORTUGAL
SI BREST
SE PDG-REM-BEEP-LEP
UM BEEP-LM2E
   LEMAR
IN WOS Ifremer UMR
   WOS Cotutelle UMR
   copubli-france
   copubli-europe
   copubli-univ-france
IF 2.4
TC 8
UR https://archimer.ifremer.fr/doc/00750/86170/91411.pdf
LA English
DT Article
CR MEDITS
DE ;Trophic ecology;Stable isotopes;Stomach content;Mesopredator;Food webs;Benthopelagic predator
AB Deep-sea elasmobranchs are commonly reported as bycatch of deep-sea fisheries and their subsequent loss has been highlighted as a long-running concern to the ecosystem ecological functioning. To understand the possible consequences of their removal, information on basic ecological traits, such as diet and foraging strategies, is needed. Such aspects have been widely studied through stomach content analysis but the lack of long-term dietary information requires other tools to be used such as stable isotopes. This study examines nitrogen and carbon isotope compositions of the velvet belly lantern shark, Etmopterus spinax, one of the most impacted shark species in Northeastern Atlantic fisheries as a result of accidental catches. E. spinax was sampled at four different locations, characterized by contrasting oceanographic and ecological conditions: the western Mediterranean Sea (near the Balearic Islands), the southern Iberian upwelling system, Rockall Trough and southwestern Norwegian fjords. Stomach content analysis revealed similar prey species among sites, with a diet dominated by Euphausiacea (mostly Meganyctiphanes norvegica) and an ontogenetic shift towards small teleost fishes, cephalopods or other crustaceans. Despite these similarities, muscle stable isotope compositions differed across sampled locations. Rather than clear dietary differences, the contrasted isotopic values are likely to reflect differences in environmental settings and biogeochemical processes affecting nutrient dynamics at the base of the food webs. 
PY 2022
PD APR
SO Deep-sea Research Part I-oceanographic Research Papers
SN 0967-0637
PU Elsevier BV
VL 182
UT 000782590600001
DI 10.1016/j.dsr.2022.103708
ID 86170
ER

EF