Annelid polychaetes experience metabolic acceleration as other Lophotrochozoans: Inferences on the life cycle of Arenicola marina with a Dynamic Energy Budget model

Abstract

Arenicola marina is a polychaete (Lophotrochozoan) displaying a complex bentho-pelagic life cycle with two larval dispersal phases, only partially described up to now. A Dynamic Energy Budget (DEB) model was applied to the species in order to reconstruct its life cycle and growth under in situ environmental conditions. Two types of DEB models are usually applied to other Lophotrochozoans displaying similar life cycles: the standard (std-) model, applied to polychaetes (5 entries among the 1524 of the Add-my-Pet database on the 18/10/2018), and the abj-model, which includes an acceleration of metabolism between birth and metamorphosis, and which has been applied to most molluscs (77 abj-entries out of the 80 mollusc entries) enabling better fit predictions for the early life stages. The parameter estimation was performed with both models to assess the suitability of an abj-model for A. marina. The zero-variate dataset consisted of length and age data at different life cycle stages, the lifespan, the maximum observed length, and the wet weight of an egg. The uni-variate dataset consisted of two growth experiments from the literature at two food levels and several temperatures, laboratory data of oxygen consumption at several temperatures, and fecundity for different lengths. The predictions of the abj-model fitted better to the data (SMSE = 0.29). The acceleration coefficient was ca 11, which is similar to mollusc values. The field growth curves and the scaled functional responses (as a proxy of food levels) were suitably reconstructed with the new parameter set. The reconstruction of the early life-stages chronology according to in situ environmental conditions of a temperate marine ecosystem indicated a first dispersal phase of 5 days followed by a 7 months temporary settlement before a second dispersal phase in spring, at the end of metamorphosis. We emphasize the need for using abj-models for polychaetes in future studies.

Therapeutic effect of marine bioactive substances against periodontitis based on in vitro, in vivo, and clinical studies

“…Additionally, several biopolymers and bioactive substances, such as chitosan, COL, and fish oil, are extracted from Chordata and exhibit antioxidant, antimicrobial, and antiinflammatory activities and biocompatibility (Asari et al, 2021;Oh et al, 2021;Satpathy et al, 2021). Arenicola marina inhabits intertidal soft sediments from the Arctic to the Mediterranean and contains peptides and extracellular hemoglobin with antimicrobial and anti-hepatotoxicity activities (De Cubber et al, 2019;Le Daré et al, 2021;Umnyakova et al, 2018). Based on the pharmacological properties of the marine resources, many studies analyzed in this review investigated the potential of MBS for periodontitis treatment.…”

The role of Dynamic Energy Budgets in conservation physiology

“…While DEB theory does not provide tools to estimate species richness or diversity indices, the fact that it relies on the empirical evidence of the universality of metabolic processes among organisms makes it applicable to any animal or vegetal species and allows comparison between the traits and model characteristics of these species, which should be useful for conservation efforts. DEB models have been developed for bacteria ( Eichinger et al , 2009 ), micro-algae ( Muller and Nisbet, 2014 ; Livanou et al , 2019 ) and macro-algae ( Lavaud et al , 2020 ), rotifers ( Shertzer and Ellner, 2002 ), bivalves ( Cardoso et al , 2006 ; Montalto et al , 2015 ), annelids ( De Cubber et al , 2019 ), insects ( Llandres et al , 2015 ; Maino and Kearney, 2015 ), sea stars ( Monaco et al , 2014 ; Agüera et al , 2015 ), sea cucumbers ( Ren et al , 2017 ), fishes ( van der Veer et al , 2001 ; Kooijman and Lika, 2011; Augustine et al , 2017 ), amphibians ( Mueller et al , 2012 ), lizards ( Kearney, 2012 ; Schwarzkopf et al , 2016 ), turtles ( Marn et al , 2019 ), birds ( Teixeira et al , 2014 ; Kooijman, 2020a ) and mammals ( Desforges et al , 2019 ; Silva et al , 2020 ). The AmP collection, a database of all DEB parameter sets (as well as underlying data and code) for animals, includes all large phyla ( Fig.…”

Marine Turf of an Invasive Alga Ousts Lugworms From Lower Shore

“…Numerically, the share of lugworms dwelling at the lower shore in the Wadden Sea may be small (Beukema and de Vlas 1979). Although sedentary during most of its life, lugworms migrate occasionally, not only as juveniles but also as adults (Reise 1985;De Cubber et al 2019). The latter may migrate downslope to avoid crowding, escape cold spills or predation (Farke et al 1979;Reise et al 2001).…”