Physiological responses to hypoxia and anoxia in Balanus amphitrite (Cirripedia: Thoracica)
2009; Inter-Research; Volume: 390; Linguagem: Inglês
10.3354/meps08155
ISSN1616-1599
Autores Tópico(s)Marine Bivalve and Aquaculture Studies
ResumoMEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsTheme Sections MEPS 390:157-166 (2009) - DOI: https://doi.org/10.3354/meps08155 Physiological responses to hypoxia and anoxia in Balanus amphitrite (Cirripedia: Thoracica) Dattesh V. Desai*, S. Prakash National Institute of Oceanography, Council of Scientific and Industrial Research, Dona Paula, Goa 403 004, India *Email: ddattesh@nio.org ABSTRACT: The barnacle Balanus amphitrite Darwin is a dominant intertidal and major fouling organism. As its life cycle includes both sessile and pelagic phases, adaptation is a necessity to tolerate harsh conditions that are faced in the intertidal and pelagic environment. A downward trend in dissolved oxygen levels in coastal areas has been recently observed, which would have a more prominent effect on sessile organisms inhabiting the intertidal habitats. The effects of reduced dissolved oxygen levels (hypoxia) and no oxygen (anoxia) on B. amphitrite adults and nauplii was assessed. Their response was evaluated by estimating the levels of the antioxidant enzymes catalase and superoxide dismutase. The impact of desiccation on antioxidant enzymes in adult B. amphitrite collected from different tidal heights was also evaluated. When nauplii were starved, 100% mortality was observed after 64 h under hypoxia, and between 24 and 32 h under anoxia. However, when nauplii were exposed to hypoxia and anoxia along with food, their tolerance level increased. A decrease in naupliar feeding rate and oxygen consumption was observed when they were exposed to hypoxia and anoxia. A significant difference in the levels of antioxidant enzymes in adult B. amphitrite collected at different tidal levels was observed. Enzyme activity increased with increase in the duration of tidal exposure, suggesting a capability to adapt to stress in different niches. Nauplii showed antioxidant defense (increased enzyme activity) under hypoxia and anoxia. The magnitude of change in enzyme levels suggests that these enzymes could be potential biomarkers of stress. KEY WORDS: Balanus amphitrite · Desiccation · Hypoxia · Anoxia · Catalase · Superoxide dismutase Full text in pdf format PreviousNextCite this article as: Desai DV, Prakash S (2009) Physiological responses to hypoxia and anoxia in Balanus amphitrite (Cirripedia: Thoracica). Mar Ecol Prog Ser 390:157-166. https://doi.org/10.3354/meps08155 Export citation RSS - Facebook - Tweet - linkedIn Cited by Published in MEPS Vol. 390. Online publication date: September 18, 2009 Print ISSN: 0171-8630; Online ISSN: 1616-1599 Copyright © 2009 Inter-Research.
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