Dynamic energy budget model: a monitoring tool for growth and reproduction performance of Mytilus galloprovincialis in Bizerte Lagoon (Southwestern Mediterranean Sea)

Abstract

Mussel farming is the main economic activity in Bizerte Lagoon, with a production that fluctuates depending on environmental factors. In the present study, we apply a bioenergetic growth model to the mussel Mytilus galloprovincialis, based on dynamic energy budget (DEB) theory which describes energy flux variation through the different compartments of the mussel body. Thus, the present model simulates both mussel growth and sexual cycle steps according to food availability and water temperature and also the effect of climate change on mussel behavior and reproduction. The results point to good concordance between simulations and growth parameters (metric length and weight) for mussels in the lagoon. A heat wave scenario was also simulated using the DEB model, which highlighted mussel mortality periods during a period of high temperature.

A Bayesian overhaul of thermal tolerance landscape models: Predicting ectotherm lethality buildup and survival amid heatwaves

“…2021), reduced growth rates (Vajedsamiei et al . 2021b) and perturbed reproduction (Béjaoui-Omri et al . 2014).…”

“…Our results showed that both the BR and ABC-SMC techniques accurately estimate survival rates under CHW conditions, accounting for data censoring. Under heightened temperatures, these alterations can lead to a range of physiological setbacks, such as weakened immune functions(Cellura et al 2007;Hong et al 2021), reduced growth rates(Vajedsamiei et al 2021b) and perturbed reproduction(Béjaoui- Omri et al 2014). The sublethal lethality buildup modeled in our study can quantitatively represent these responses to stress and fitness setbacks.…”

Modelling mussel (<i>Mytilus spp.</i>) microplastic accumulation

“…The latter equation was applied in eight areas in total (two from the present study areas and six from Li et al, 2018), with relatively good results since there is general overlapping of regressed and observed MPs concentration in the environment (C env ), except for Hastings-A and Plymouth areas, probably due to missing information on the environmental conditions (CHL a, SST) during the sampling, suggesting that the mussels can be used as potential bioindicators. Mussels have been previously proposed as bioindicators for marine microplastic pollution (< 1 mm), although the efficient gut clearance and selective feeding behaviour limit their quantitative ability (Lusher et al, 2017;Bråte et al, 2018;Beyer et al, 2017;Fossi et al, 2018;Li et al, 2019).The recent study by Ward et al (2019b) demonstrated that bivalves are poor bioindicators of MPs pollution due to the particle selection during feeding and excretion processes that is based on the physical characteristics of the MPs. Considering that the MPs accumulation is site-dependent and that sampling of mussels is usually easier than seawater (Karlsson et al,942 N. Stamataki et al: Modelling mussel (Mytilus spp.)…”

Modelling mussel (&lt;i&gt;Mytilus&lt;/i&gt; spp.) microplastic accumulation

“…3.829 4.00-7.70 5.20 12.0-28.0 7.26 ± 0.46 Béjaoui-Omri et al, 2014 https://doi.org/10.5194/os-2020-11 Preprint. Discussion started: 10 March 2020 c Author(s) 2020.…”