Using the Dynamic Energy Budget theory to evaluate the bioremediation potential of the polychaete Hediste diversicolor in an integrated multi-trophic aquaculture system

Type Article
Date 2020-12
Language English
Author(s) Lopes Galasso Helena1, 2, Lefebvre Sebastien3, Aliaume Catherine4, Sadoul Bastien1, Callier MyriamORCID1
Affiliation(s) 1 : MARBEC, Univ Montpellier, CNRS, Ifremer, IRD, Palavas-les-Flots, France
2 : CAPES Foundation, Ministry of Education of Brazil, Brasília, DF 70040-020, Brazil
3 : Université de Lille, Université Littoral Côte d'Opale, CNRS, Laboratoire d'Océanologie et Géosciences (UMR 8187 LOG), Station Marine de Wimereux, F-59000 Lille, France
4 : MARBEC, Univ Montpellier, CNRS, Ifremer, IRD, Montpellier, France
Source Ecological Modelling (0304-3800) (Elsevier BV), 2020-12 , Vol. 437 , P. 109296 (10p.)
DOI 10.1016/j.ecolmodel.2020.109296
WOS© Times Cited 4
Keyword(s) DEB, Deposit feeders, Fish waste, Metabolism, Ragworm, Semelparous, Bioenergetics
Abstract

Integrated Multi-Trophic Aquaculture (IMTA) systems have been designed to optimize nutrient and energy use, to decrease waste, and to diversify fish-farm production. Recently, the development of detritivorous aquaculture has been encouraged, as detrivores can consume organic particulate matter, reducing benthic eutrophication and the environmental footprint of aquaculture. To this end, the polychaete Hediste diversicolor is a promising species due to its broad feeding behaviour and its resistance in a wide range of environments. In this study, an existing Dynamic Energy Budget (DEB) model of H. diversicolor was used to predict the ragworm's metabolic processes in various environmental conditions and to estimate its bioremediation capacity in an aquaculture context. First, the scaled functional response (f) was calibrated in a 98-day growth experiment with two types of food (Fish faeces and Fish feed). Then, we further validated the model using data on the ammonia excretion and oxygen consumption of individuals fed with fish faeces at four different temperatures using the previously calibrated f. Overall, we found that the DEB model was able to correctly predict the experimental data (0.51<MRE<0.80). Lastly, different environmental scenarios of seawater temperatures and assimilation rates were compared. The bioremediation potential of H. diversicolor was estimated based on cumulated assimilation rates, which could represent 75-289 kg of fish waste year−1 for a 100 m2 ragworm farm (3700 ind. m−2). These findings suggest that the DEB model is a promising tool for further IMTA development and management.

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Lopes Galasso Helena, Lefebvre Sebastien, Aliaume Catherine, Sadoul Bastien, Callier Myriam (2020). Using the Dynamic Energy Budget theory to evaluate the bioremediation potential of the polychaete Hediste diversicolor in an integrated multi-trophic aquaculture system. Ecological Modelling, 437, 109296 (10p.). Publisher's official version : https://doi.org/10.1016/j.ecolmodel.2020.109296 , Open Access version : https://archimer.ifremer.fr/doc/00653/76486/