FN Archimer Export Format
PT J
TI Is Holothuria tubulosa the golden goose of ecological aquaculture in the Mediterranean Sea?
BT 
AF Sadoul, Bastien
   Caprioli, Jean-Philippe
   Barrier-Loiseau, Chloe
   Cimiterra, Nicolas
   Laugier, Thierry
   Lagarde, Franck
   Chary, Killian
   Callier, Myriam
   Guillermard, Marine-Oceane
   ROQUE D'ORBCASTEL, Emmanuelle
AS 1:1,2;2:3;3:1,3;4:1;5:1;6:1;7:4;8:5;9:6;10:1,7;
FF 1:PDG-RBE-MARBEC-LAAAS;2:;3:PDG-RBE-MARBEC-LAAAS;4:PDG-ODE-LITTORAL-LERLR;5:PDG-RBE-MARBEC;6:PDG-ODE-LITTORAL-LERLR;7:;8:PDG-RBE-MARBEC-LAAAS;9:;10:PDG-ODE-LITTORAL-LERLR;
C1 MARBEC, Univ Montpellier, CNRS, Ifremer, IRD, Sète, France
   DECOD (Ecosystem Dynamics and Sustainability), Institut Agro, Ifremer, INRAE, Rennes, France
   Ferme Marine de Campomoro, Tralavettu, 20110 Propriano, France
   Wageningen University, Department of Animal Sciences, Wageningen, Netherlands
   MARBEC, Univ Montpellier, CNRS, Ifremer, IRD, Palavas-les-Flots, France
   ITAVI, 7 Rue du Faubourg Poissonnière, 75009 Paris, France
   IOC, Indian Ocean Commission, Blue Tower, Rue de l'Institut, Ebène, Mauritius
C2 IFREMER, FRANCE
   IFREMER, FRANCE
   FERME MARINE CAMPOMORO, FRANCE
   UNIV WAGENINGEN, NETHERLANDS
   IFREMER, FRANCE
   ITAVI, FRANCE
   IOC, MAURITIUS
SI PALAVAS
   SETE
SE PDG-RBE-MARBEC-LAAAS
   PDG-ODE-LITTORAL-LERLR
   PDG-RBE-MARBEC
UM MARBEC
   DECOD
IN WOS Ifremer UMR
   copubli-france
   copubli-europe
   copubli-int-hors-europe
   copubli-sud
IF 4.5
TC 7
UR https://archimer.ifremer.fr/doc/00756/86842/92326.pdf
LA English
DT Article
DE ;Detritivores;Sea cucumber;Integrated multi-trophic aquaculture;Isotopes;Fatty acids;Organic footprint
AB The use of detritivores under sea farms is a promising avenue to mitigate the benthic impacts of marine fish farms. Sea cucumbers are interesting candidates for integrated multi-trophic aquaculture (IMTA) due to their prevalence in the marine environment, their diversified diet and their economic value. Yet limited information is available regarding their capacities to be stocked and reared underneath aquaculture cages and the associated effects on their survival, growth rate and body composition. This study focused on Holothuria tubulosa, a Mediterranean sea cucumber species candidate for rearing in the vicinity to marine fish cages. We investigated its potential for co-culture on the seabed more or less influenced by marine fish cages. The farm's waste footprint was predicted using a dispersion model (NewDEPOMOD) to estimate the farm's influence along a transect where we also sampled sediment at four distances from the cages (0 m, 25 m, 100 m from the cages, plus a reference site at 150 m). Organic composition of the sediment was analysed (TOC, TON, TOP, OM, stable isotope signature) and linked to the results from the dispersion model. Based on the model simulation, the maximum flux of matter reached almost 17 kg solids.m−2.year−1 below the cages, and gradually decreased with distance from the cages. An isotopic gradient was also found in the sediments according to the distance from the farm, with an enrichment in δN15 and a depletion in δC13 with increasing proximity to the farm. In parallel we investigated the response of adult sea cucumbers placed at varying distances from the fish cages for a period of one month, measuring their proximate composition, isotopic concentration, and fatty acid and protein composition. We found that despite good survival, growth was null over the experiment. While the isotope signature of the sea cucumbers was significantly affected by distance from the cage, this did not follow the pattern found in sediment. There was a clear difference in fatty acid composition between sites, with sea cucumbers closer to the cages having lower levels of short-chain fatty acids. The protein content was also lower in sea cucumbers reared right below the cages. These results suggest that while adult H. tubulosa can survive the environmental conditions below marine aquaculture cages, they do not nutritionally benefit from fish waste over short periods in the stocking conditions we tested. Their use in IMTA requires further investigation to find optimal stocking conditions. 
PY 2022
PD MAY
SO Aquaculture
SN 0044-8486
PU Elsevier BV
VL 554
UT 000778568400008
DI 10.1016/j.aquaculture.2022.738149
ID 86842
ER

EF