title: Oxidative stress indicators and trace elements in the blue shark (Prionace glauca) off the east coast of the Mexican Pacific Ocean.
abstract: Trace element concentrations and oxidative stress indicators (including production of reactive oxygen species (ROS), antioxidant enzyme activities and oxidative damage) were measured in muscle of blue sharks collected along the west coast of Baja California Sur to determine potential differences by sex and maturity cohorts. Mercury (Hg) concentration in muscle samples from larger sharks (>200 cm LT) exceeded the permissible limit (>1 ppm wet weight) for human consumption set by numerous international agencies. Significant differences were found in Hg concentrations (mature>immature; males>females), and in protein carbonyl concentrations (male>female); however, except for carbonyl protein levels, no significant differences by sex or maturity stage were found in the oxidative stress indicators. Differences between sexes and maturity stages in trace element concentration and carbonyl protein levels in blue shark muscle may be related to variations in diet within different cohorts.
authors.affiliation: Centro de Investigaciones Biológicas del Noroeste, Playa Palo Santa Rita, La Paz, Baja California Sur, Mexico. angelicabg84@yahoo.com
authors.forename: Angélica
authors.initials: A
authors.lastname: Barrera-García
authors.forename: Todd
authors.initials: T
authors.lastname: O'Hara
authors.forename: Felipe
authors.initials: F
authors.lastname: Galván-Magaña
authors.forename: Lía C
authors.initials: LC
authors.lastname: Méndez-Rodríguez
authors.forename: J Margaret
authors.initials: JM
authors.lastname: Castellini
authors.forename: Tania
authors.initials: T
authors.lastname: Zenteno-Savín
mesh_terms: D000367:Age Factors; D000818:Animals; D000975:Antioxidants / Q000378:metabolism; D002104:Cadmium / Q000378:metabolism; D004784:Environmental Monitoring / Q000379:methods; D004789:Enzyme Activation; D005260:Female; D008297:Male; D008628:Mercury / Q000378:metabolism; D008800:Mexico; D018482:Muscle, Skeletal / Q000378:metabolism*; D018384:Oxidative Stress; D010140:Pacific Ocean; D025341:Principal Component Analysis; D050050:Protein Carbonylation; D017382:Reactive Oxygen Species / Q000378:metabolism; D012737:Sex Factors; D012754:Sharks / Q000378:metabolism*; D014131:Trace Elements / Q000378:metabolism*
chemical_list: D000975:Antioxidants; D017382:Reactive Oxygen Species; D014131:Trace Elements; D002104:Cadmium; D008628:Mercury