Por favor, use este identificador para citar o enlazar este ítem: http://repositoriodigital.ipn.mx/handle/123456789/14252
Título : Superoxide radical production in response to environmental hypoxia in cultured shirimp
Autor : Zenteno Savin, Tania
Saldierna Martínez, Ricardo Javier
Ahuejote Sandoval, Mauricio
Palabras clave : Litopenaeus vannamei, Reactive oxygen species, Oxidative stress, Antioxidants, Free radicals, Aquaculture Hypoxia
Fecha de publicación : 2006
Editorial : Comparative Biochemistry and Physiology Part C: Toxicology & Pharmacology
Resumen : Markers of oxidative stress in response to hypoxia and reoxygenation were assessed in Pacific white shrimp (Litopenaeus vannamei). Adult shrimp were either exposed to hypoxia (1 mg O2/L) for 6, 12, or 24 h followed by 1-h reoxygenation, or exposed to hypoxia for 24 h followed by 1- to 6-h reoxygenation. In all cases, shrimp maintained at constant normoxia were used as controls. Spectrophotometric techniques were applied to analyze lactate concentration, superoxide radical (O2[dot above]-) production, lipid peroxidation (TBARS), and antioxidant capacity status in muscle, hepatopancreas, and gill samples. Results indicate differences among tissues, even under control conditions. O2[dot above]- production and TBARS levels were higher in hepatopancreas than in gill or muscle. No effect of exposure to hypoxia was found. However, reoxygenation following exposure to hypoxia was found to affect the oxidative metabolism of muscle and hepatopancreas from cultured shrimp. Lactate concentration and O2[dot above]- production increased while antioxidant capacity decreased in hepatopancreas and muscle in the first hours of reoxygenation. This could translate into tissue damage, which may significantly jeopardize the commercial aquaculture product.
URI : http://www.repositoriodigital.ipn.mx/handle/123456789/14252
ISSN : 1532-0456
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