FN Archimer Export Format
PT J
TI Multiple nutritional strategies of hydrothermal vent shrimp (Rimicaris hybisae) assemblages at the Mid-Cayman Rise
BT 
AF Versteegh, Emma A.A.
   Van Dover, Cindy L.
   Van Audenhaege, Loic
   Coleman, Max
AS 1:1;2:2;3:3;4:1;
FF 1:;2:;3:PDG-REM-BEEP-LEP;4:;
C1 NASA Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA, 91109, USA
   Division of Marine Science and Conservation, Nicholas School of the Environment, Duke University, 135 Marine Lab Road, Beaufort, NC, 28516, USA
   Univ Brest, CNRS, Ifremer, UMR6197 BEEP, F-29280, Plouzané, France
C2 JET PROP LAB, USA
   UNIV DUKE, USA
   IFREMER, FRANCE
SI BREST
SE PDG-REM-BEEP-LEP
UM BEEP-LM2E
IN WOS Ifremer UMR
   copubli-int-hors-europe
IF 2.4
TC 4
UR https://archimer.ifremer.fr/doc/00801/91302/97075.pdf
LA English
DT Article
DE ;Carbon isotopes;Gut content;Nitrogen isotopes;Sulfur isotopes;Von Damm Vent field
AB Alvinocaridid shrimp occurring in dense assemblages close to vigorously venting orifices are characteristic of many vent fields on the Mid-Atlantic Ridge, Central Indian Ridge, and Mid-Cayman Rise. Episymbiotic bacteria of these shrimp are exposed to vent fluids enriched in inorganic nutrients (carbon dioxide, sulfide) that, together with dissolved oxygen in the surrounding seawater, sustain autotrophic growth and supply nourishment to the shrimp. Enigmatically, conspecific shrimp may also be found sparsely distributed in the periphery of a vent field, where there is little visual evidence of vent fluid flux. We tested the null hypothesis that nourishment sources were identical for the central (dense) and peripheral shrimp assemblages, using gut content and stable isotope analyses. Rimicaris hybisae were sampled from central and peripheral assemblages at the Von Damm Vent Field (Mid-Cayman Rise). Guts of centrally aggregated shrimp contained a white material inferred to be bacteria, while peripheral individuals contained this white material and/or pieces of crustacean exoskeletons. C, N, and S isotopic compositions of shrimp muscle tissues were significantly different between central and peripheral shrimp assemblages, and little overlap in isotopic space was found. A comparison of δ13C and δ34S values of gut contents and abdominal tissues revealed that abdominal tissue composition reflects the shrimp's source of nourishment. Slight but significantly elevated δ15N values in peripheral shrimp, together with crustacean exoskeleton fragments in the gut, suggest facultative carnivory in peripherally aggregated shrimp. The lower δ13C and δ34S values in individuals from the peripheral assemblages are also consistent with a mixotrophic diet. We conclude that central and peripheral assemblages of R. hybisae have different nourishment sources, with central assemblages relying on episymbionts, while peripheral assemblages have diverse nourishment sources comprising bacteria and Crustacea. 
PY 2023
PD FEB
SO Deep-sea Research Part I-oceanographic Research Papers
SN 0967-0637
PU Elsevier BV
VL 192
UT 000976235300001
DI 10.1016/j.dsr.2022.103915
ID 91302
ER

EF