title: Baseline defense system of commercial male king crab Lithodes santolla from the Beagle Channel.
abstract: Environmental and physiological variations influence the steady-state concentration of free oxygen radicals in cells. Because of the seasonal life cycle of Lithodes santolla in the Beagle Channel, a baseline study of the antioxidant physiological variations along the seasons is necessary for a better understanding of its ecophysiology. The aim of this study was to evaluate the seasonal variations in gills, hemolymph, muscle and hepatopancreas of the: i) enzymatic activities of superoxide dismutase, catalase, glutathione peroxidase and glutathione transferase; ii) ascorbic acid and total glutathione; iii) lipid peroxidation and protein oxidation; iv) glucose, proteins and pH. Seasonality found in the antioxidant defense system of L. santolla from the Beagle Channel acts in a collaborative way during the most relevant life cycle phases (reproduction and molting), avoiding a long term oxidative stress. The antioxidant system also shows changes in the enzymatic activities likely caused by the environmental factors, such as low temperatures during winter and spring seasons.
authors.affiliation: Consejo Nacional de Investigaciones Científicas y Técnicas, CONICET, Centro Austral de Investigaciones Científicas, CADIC, Houssay 200, V9410CAB Ushuaia, Tierra del Fuego, Argentina. Electronic address: nschvezov@cadic-conicet.gob.ar.
authors.forename: N
authors.initials: N
authors.lastname: Schvezov
authors.affiliation: Consejo Nacional de Investigaciones Científicas y Técnicas, CONICET, Centro Austral de Investigaciones Científicas, CADIC, Houssay 200, V9410CAB Ushuaia, Tierra del Fuego, Argentina.
authors.forename: G A
authors.initials: GA
authors.lastname: Lovrich
authors.affiliation: Consejo Nacional de Investigaciones Científicas y Técnicas, CONICET, Centro Austral de Investigaciones Científicas, CADIC, Houssay 200, V9410CAB Ushuaia, Tierra del Fuego, Argentina.
authors.forename: O
authors.initials: O
authors.lastname: Florentín
authors.affiliation: Consejo Nacional de Investigaciones Científicas y Técnicas, CONICET, Centro Austral de Investigaciones Científicas, CADIC, Houssay 200, V9410CAB Ushuaia, Tierra del Fuego, Argentina.
authors.forename: M C
authors.initials: MC
authors.lastname: Romero
mesh_terms: D000136:Acid-Base Equilibrium; D000222:Adaptation, Physiological; D000818:Animals; D033381:Anomura / Q000502:physiology*; D060829:Arthropod Proteins / Q000378:metabolism; D002374:Catalase / Q000378:metabolism; D005880:Gills / Q000502:physiology; D005978:Glutathione / Q000378:metabolism; D006458:Hemolymph / Q000502:physiology; D043143:Hepatopancreas / Q000378:metabolism; D015227:Lipid Peroxidation; D008297:Male; D009132:Muscles / Q000378:metabolism; D009928:Organ Specificity; D018384:Oxidative Stress; D012621:Seasons; D013482:Superoxide Dismutase / Q000378:metabolism
chemical_list: D060829:Arthropod Proteins; D002374:Catalase; D013482:Superoxide Dismutase; D005978:Glutathione
keywords: Antioxidant; Biomarker; Decapod; Reactive oxygen species; Seasonal; Sub-Antarctic