Seasonal changes of antioxidant and oxidative parameters in the coral Pocillopora capitata on the Pacific coast of Mexico |
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| Authors: | Marco A Liñán‐Cabello Laura A Flores‐Ramírez Tania Zenteno‐Savin Norma O Olguín‐Monroy Ramón Sosa‐Avalos Manuel Patiño‐Barragan Aramis Olivos‐Ortiz |
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| Institution: | 1. Acuacultura/Biotecnología, FACIMAR, Universidad de Colima, Colima, México;2. Centro de Investigaciones Biológicas del Noroeste (CIBNOR), Mar Bermejo Baja California Sur, Mexico |
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| Abstract: | The physiological responses of the coral Pocillopora capitata to environmental conditions common in winter and summer were studied in 2007 during February–March (winter) and June–July (summer) at La Boquita reef (Manzanillo, Colima, Mexico). Shallow and deep sampling stations were established at different distances from a small jetty built next to the Juluapan Lagoon. We analyzed superoxide radicals ( ) and lipid peroxidants (TBARS); the activities of superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPx), glutathione reductase (GR), and glutathione‐S‐transferase (GST); chlorophyll a (Chl a), zooxanthellae density (ZD); and mycosporine‐like amino acids (MAAs). Our results showed that the  , TBARS, CAT, GST, MAAs, and Chl a, levels were significantly higher in summer (P < 0.05); no seasonal difference was found for GPx, GR or ZD. We found significant differences (P < 0.05) in winter only for Chl a and ZD at shallow sites and, in contrast, for  at deeper sites. The results of this study indicate that increasing temperature and radiation associated with seasonal changes (from winter to summer), the efficiency of the enzymes GST, CR and GPX, and the production of MAAs together form a powerful mechanism for P. capitata to offset the detrimental effects of environmental change. |
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| Keywords: | Coral oxidative stress Pocillopora capitata temperature UV radiation |
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