Energetic cost derived of short-term starvation on marine crustacean Palaemon elegans

Abstract

Event Abstract Back to Event Energetic cost derived of short-term starvation on marine crustacean Palaemon elegans Ico Martinez1*, Alicia Herrera1, Inmaculada Herrera1, Daniel R. Bondyale-Juez1, Vanesa Romero-Kutzner1, Mayte Tames-Espinosa1, Theodore T. Packard1 and May Gómez Cabrera1 1 University of Las Palmas de Gran Canaria, Spain Starvation has a major impact on physiological processes in marine plankton and these processes have a major impact on the energy transfer through marine ecosystems. However, quantifying and understanding how starvation changes different aspects of the energy transfer has been retarded because planktologists have largely relied on biomass fractionation to shed light on it. Here, we experiment with the cellular energy allocation approach (CEA index), the respiratory electron transport system activity (ETS), and organic analysis of lipids (Lip), carbohydrates (Carb) and proteins (Prot) to help further our understanding of the energy transfer in the caridean shrimp, Palaemon elegans. We analyzed the effect of 72 hours of starvation using the CEA index that is calculated as the ratio between energy available to energy consumption. It allows us to evaluate the net energy budget (Verslycke and Janssen, 2002). The energy available (Ea) was determined from Lip, Carb, and Prot content, where Ea = Lip + Carb + Prot. Energy consumption (Ec) was calculated from the activity of ETS. All the parameters were transformed into energy equivalents using their respective energy of combustion (Gnaiger, 1983). Proteins were the main energy source (1450.8±355.7 mJ•mgWW-1), followed by lipids (727.2±124.4 mJ•mgWW-1) and carbohydrates (82.1±17.9 mJ•mgWW-1). After 24 hours of starvation, the carbohydrates dropped by 38.2%, a significant decrease. After 48 hours, the proteins had decreased by 36.0%. The lipids were the last to decrease. After 72 hours they had dropped by 42.3%. Adding these organic constituents to calculate the Ea revealed a significant decreasing trend of 34.42% at 72 hours (from 2260.1±485.5 to 1482.3±120.9 mJ•mgWW-1). In contrast, the Ec, as ETS activity, showed a significant increase at 24 hours (from 85.2±16.6 to 158.0±40.4 mJ•h-1•mgWW-1) that stabilized after 72 hours. Overall, the energy balance (Ea/Ec) showed that the energy available was higher than the energy consumption during the experiment. Ea/Ec ratio decreased for the first 24 hours, then remained stable for the next 48 hours. This portrait of energy regulation shows a rapid shift mechanism of P. elegans under sudden adverse conditions. References Gnaiger, E. (1983). ‘Calculation of energetic and biochemical equivalents of respiratory oxygen consumption’, in Polarographic oxygen sensors (Springer), 337–345. Verslycke, T., and Janssen, C. R. (2002). Effects of a changing abiotic environment on the energy metabolism in the estuarine mysid shrimp Neomysis integer (Crustacea: Mysidacea). J. Exp. Mar. Bio. Ecol. 279, 61–72. Keywords: CEA index, Energy available, energy consumption, Palaemon elegans, Starvation Conference: XX Iberian Symposium on Marine Biology Studies (SIEBM XX) , Braga, Portugal, 9 Sep - 12 Sep, 2019. Presentation Type: Poster Presentation Topic: Ecology, Biodiversity and Vulnerable Ecosystems Citation: Martinez I, Herrera A, Herrera I, Bondyale-Juez DR, Romero-Kutzner V, Tames-Espinosa M, Packard TT and Gómez Cabrera M (2019). Energetic cost derived of short-term starvation on marine crustacean Palaemon elegans. Front. Mar. Sci. Conference Abstract: XX Iberian Symposium on Marine Biology Studies (SIEBM XX) . doi: 10.3389/conf.fmars.2019.08.00191 Copyright: The abstracts in this collection have not been subject to any Frontiers peer review or checks, and are not endorsed by Frontiers. They are made available through the Frontiers publishing platform as a service to conference organizers and presenters. The copyright in the individual abstracts is owned by the author of each abstract or his/her employer unless otherwise stated. Each abstract, as well as the collection of abstracts, are published under a Creative Commons CC-BY 4.0 (attribution) licence (https://creativecommons.org/licenses/by/4.0/) and may thus be reproduced, translated, adapted and be the subject of derivative works provided the authors and Frontiers are attributed. For Frontiers’ terms and conditions please see https://www.frontiersin.org/legal/terms-and-conditions. Received: 14 May 2019; Published Online: 27 Sep 2019. * Correspondence: Mrs. Ico Martinez, University of Las Palmas de Gran Canaria, Las Palmas de Gran Canaria, Spain, ico.martinez@ulpgc.es Login Required This action requires you to be registered with Frontiers and logged in. To register or login click here. Abstract Info Abstract The Authors in Frontiers Ico Martinez Alicia Herrera Inmaculada Herrera Daniel R Bondyale-Juez Vanesa Romero-Kutzner Mayte Tames-Espinosa Theodore T Packard May Gómez Cabrera Google Ico Martinez Alicia Herrera Inmaculada Herrera Daniel R Bondyale-Juez Vanesa Romero-Kutzner Mayte Tames-Espinosa Theodore T Packard May Gómez Cabrera Google Scholar Ico Martinez Alicia Herrera Inmaculada Herrera Daniel R Bondyale-Juez Vanesa Romero-Kutzner Mayte Tames-Espinosa Theodore T Packard May Gómez Cabrera PubMed Ico Martinez Alicia Herrera Inmaculada Herrera Daniel R Bondyale-Juez Vanesa Romero-Kutzner Mayte Tames-Espinosa Theodore T Packard May Gómez Cabrera Related Article in Frontiers Google Scholar PubMed Abstract Close Back to top Javascript is disabled. Please enable Javascript in your browser settings in order to see all the content on this page.