FN Archimer Export Format
PT J
TI Using otolith organic matter to detect diet shifts in Bardiella chrysoura, during a period of environmental changes
BT 
AF SIROT, C.
   GRONKJAER, P.
   PEDERSEN, J. Brogger
   PANFILI, J.
   ZETINA-REJON, M.
   TRIPP-VALDEZ, A.
   RAMOS-MIRANDA, J.
   FLORES-HERNANDEZ, D.
   SOSA-LOPEZ, A.
   DARNAUDE, A. M.
AS 1:1;2:2;3:2;4:1;5:3;6:3;7:4;8:4;9:4;10:1;
FF 1:;2:;3:;4:;5:;6:;7:;8:;9:;10:;
C1 UMR MARBEC, Ctr Marine Biodivers Exploitat & Conservat, Bat 24 CC093,Pl Eugene Bataillon, F-34095 Montpellier 5, France.
   Aarhus Univ, Dept Biosci, DK-8000 Aarhus, Denmark.
   Ctr Interdisciplinario Ciencias Marinas CICIMAR I, Politecn Nacl, La Paz 23096, Baja California, Mexico.
   Univ Autonoma Campeche, Ctr Ecol Pesqueria & Oceanog Golfo Mexico EPOMEX, Campeche 24030, Mexico.
C2 UNIV MONTPELLIER, FRANCE
   UNIV AARHUS, DENMARK
   CICIMAR, MEXICO
   UNIV AUTONOMA CAMPECHE, MEXICO
UM MARBEC
IF 2.276
TC 16
UR https://archimer.ifremer.fr/doc/00625/73707/74672.pdf
   https://archimer.ifremer.fr/doc/00625/73707/74673.pdf
LA English
DT Article
DE ;Trophic ecology;Stable isotope analysis;Coastal ecosystem;Bairdiella chrysoura;Terminos Lagoon
AB Accurate knowledge on fish trophic ecology and its modifications is crucial for understanding the impact of global change on ecosystems. In this context, we investigated the value of the delta C-13 and delta N-15 of otolith soluble organic matter (SOM) for identifying temporal diet shifts in American silver perch Bairdiella chrysoura over a 30-yr period characterized by strong changes in its population size and habitats within the Terminos Lagoon (Mexico). We first compared the otolith SOM isotopic signatures from present-clay adults to those of muscle and the main local prey. Our results suggest that otolith SOM can be confidently extracted and analyzed for both present and past otoliths of this species. The mean otolith SOM signatures obtained (-15.92 +/- 1.35%, for delta C-13 and 9.38 +/- 0.93%, for delta N-15) were consistent with those of the diet as 85% of the individual signatures were included within the prey isotopic niche area. Moreover, this study supports a trophic enrichment factor between diet and otolith (TEFdiet-otolith) close to 0 for delta N-15, while for delta C-13, the TEFololith-muscle of +0.02% warrants further investigation. Then, we compared past and contemporary otolith SOM signatures to investigate temporal diet shifts in B. chrysoura. This showed that 613C and delta N-15 differed significantly between the past and present period even if the temporal shift remained relatively small (respectively +1.17%, and 0.55%). The present study substantiates the use of otolith SOM delta C-13 and delta N-15 as a proxy of fish present and past trophic position, opening the possibility for major progress in studies of temporal changes in food web ecology. 
PY 2017
PD JUN
SO Marine Ecology Progress Series
SN 0171-8630
PU Inter-research
VL 575
UT 000406135500011
BP 137
EP 152
DI 10.3354/meps12166
ID 73707
ER

EF