caa a22 4500 606229574 CHVBK 20210128101209.0 cr unu---uuuuu 210128e20150201xx s 000 0 eng 10.1007/s10695-014-0019-4 doi (NATIONALLICENCE)springer-10.1007/s10695-014-0019-4 Exposure to chronic moderate hypoxia impacts physiological and developmental traits of European sea bass ( Dicentrarchus labrax ) larvae [Elektronische Daten] [Gwenaëlle Vanderplancke, Guy Claireaux, Patrick Quazuguel, Christine Huelvan, Charlotte Corporeau, David Mazurais, José-Luis Zambonino-Infante] Since European sea bass (Dicentrarchus labrax) larvae occurred in coastal and estuarine waters at early life stages, they are likely to be exposed to reduced dissolved oxygen waters at a sensitive developmental stage. However, the effects of hypoxia at larval stage, which depend in part on fish species, remain very poorly documented in European sea bass. In the present study, the impacts of an experimental exposure to a chronic moderate hypoxia (40% air saturation) between 30 and 38days post-hatching on the physiological and developmental traits of European sea bass larvae were assessed. This study was based on the investigation of survival and growth rates, parameters related to energy metabolism [Citrate Synthase (CS) and Cytochrome-c Oxidase (COX) activities], and biological indicators of the maturation of digestive function [pancreatic (trypsin, amylase) and intestinal (Alkaline Phosphatase "AP” and Aminopeptidase-N "N-LAP”) enzymes activities]. While condition of hypoxia exposure did not induce any significant mortality event, lower growth rate as well as CS/COX activity ratio was observed in the Hypoxia Treatment group. In parallel, intestinal enzyme activities were also lower under hypoxia. Altogether, the present data suggest that sea bass larvae cope with moderate hypoxia by (1) reducing processes that are costly in energy and (2) regulating mitochondria functions in order to respond to energy-demand conditions. Both these effects are associated with a delay in the maturation of the digestive function. Springer Science+Business Media Dordrecht, 2014 Hypoxia nationallicence Fish larvae nationallicence Energy metabolism nationallicence Maturation nationallicence AP : Alkaline Phosphatase nationallicence C : Control group nationallicence COX : Cytochrome-c Oxidase nationallicence CS : Citrate Synthase nationallicence d.p.h. : Days post-hatching nationallicence FI : Feed intake nationallicence H : Head nationallicence HT : Hypoxia treatment nationallicence IS : Intestinal segment nationallicence N-LAP : Aminopeptidase-N nationallicence NS : No significant differences nationallicence PS : Pancreatic segment nationallicence RMR : Routine metabolic rate nationallicence s.e.m. : Standard error of mean nationallicence T : Tail nationallicence Vanderplancke Gwenaëlle Ifremer, LEMAR UMR 6539 CNRS-UBO-IRD-Ifremer, ZI de la Pointe du Diable, CS 10070, 29280, Plouzané, France aut Claireaux Guy Université de Bretagne Occidentale, LEMAR UMR 6539 CNRS-UBO-IRD-Ifremer, ZI de la Pointe du Diable, CS 10070, 29280, Plouzané, France aut Quazuguel Patrick Ifremer, LEMAR UMR 6539 CNRS-UBO-IRD-Ifremer, ZI de la Pointe du Diable, CS 10070, 29280, Plouzané, France aut Huelvan Christine Ifremer, LEMAR UMR 6539 CNRS-UBO-IRD-Ifremer, ZI de la Pointe du Diable, CS 10070, 29280, Plouzané, France aut Corporeau Charlotte Ifremer, LEMAR UMR 6539 CNRS-UBO-IRD-Ifremer, ZI de la Pointe du Diable, CS 10070, 29280, Plouzané, France aut Mazurais David Ifremer, LEMAR UMR 6539 CNRS-UBO-IRD-Ifremer, ZI de la Pointe du Diable, CS 10070, 29280, Plouzané, France aut Zambonino-Infante José-Luis Ifremer, LEMAR UMR 6539 CNRS-UBO-IRD-Ifremer, ZI de la Pointe du Diable, CS 10070, 29280, Plouzané, France aut Fish Physiology and Biochemistry Springer Netherlands 41/1(2015-02-01), 233-242 0920-1742 41:1<233 2015 41 10695 https://doi.org/10.1007/s10695-014-0019-4 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10695-014-0019-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Vanderplancke Gwenaëlle Ifremer, LEMAR UMR 6539 CNRS-UBO-IRD-Ifremer, ZI de la Pointe du Diable, CS 10070, 29280, Plouzané, France aut NATIONALLICENCE 700 1- Claireaux Guy Université de Bretagne Occidentale, LEMAR UMR 6539 CNRS-UBO-IRD-Ifremer, ZI de la Pointe du Diable, CS 10070, 29280, Plouzané, France aut NATIONALLICENCE 700 1- Quazuguel Patrick Ifremer, LEMAR UMR 6539 CNRS-UBO-IRD-Ifremer, ZI de la Pointe du Diable, CS 10070, 29280, Plouzané, France aut NATIONALLICENCE 700 1- Huelvan Christine Ifremer, LEMAR UMR 6539 CNRS-UBO-IRD-Ifremer, ZI de la Pointe du Diable, CS 10070, 29280, Plouzané, France aut NATIONALLICENCE 700 1- Corporeau Charlotte Ifremer, LEMAR UMR 6539 CNRS-UBO-IRD-Ifremer, ZI de la Pointe du Diable, CS 10070, 29280, Plouzané, France aut NATIONALLICENCE 700 1- Mazurais David Ifremer, LEMAR UMR 6539 CNRS-UBO-IRD-Ifremer, ZI de la Pointe du Diable, CS 10070, 29280, Plouzané, France aut NATIONALLICENCE 700 1- Zambonino-Infante José-Luis Ifremer, LEMAR UMR 6539 CNRS-UBO-IRD-Ifremer, ZI de la Pointe du Diable, CS 10070, 29280, Plouzané, France aut NATIONALLICENCE 773 0- Fish Physiology and Biochemistry Springer Netherlands 41/1(2015-02-01), 233-242 0920-1742 41:1<233 2015 41 10695