| Oxygen consumption by a coral reef sponge. | |
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MedLine Citation:
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PMID: 18552308 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Oxygen consumption of the Red Sea coral reef sponge Negombata magnifica was measured using both incubation and steady-state methods. The latter method was found to be the more reliable because sponge activity remained stable over time. Oxygen consumption rate was measured during three levels of sponge activity: full activity, reduced activity and basal activity (starved). It was found that the active oxygen consumption rate of N. magnifica averaged 37.3+/-4.6 nmol O2 min(-1) g(-1) wet mass, which is within the upper range reported for other tropical marine sponges. Fully active N. magnifica individuals consumed an average of 41.8+/-3.2 nmol O2 min(-1) g(-1) wet mass. The mean basal respiration rate was 20.2+/-1.2 nmol O2 min(-1) g(-1) wet mass, which is 51.6+/-2.5% of the active respiration rate. Therefore, the oxygen used for water pumping was calculated to be at most 10.6+/-1.8 nmol O2 min(-1) g(-1) wet mass, which is 25.1+/-3.6% of the total respiration. Combined oxygen used for maintenance and water pumping activity was calculated to be 30.8 nmol O2 min(-1) g(-1) wet mass, which is approximately 74% of the sponge's total oxygen requirement. The remaining oxygen is directed to other physiological activities, mainly the energy requirement of growth. These findings suggest that only a relatively minor amount of energy is potentially available for growth, and thus might be a factor in controlling the growth rate of N. magnifica in oligotrophic coral reefs. |
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Authors:
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Eran Hadas; Micha Ilan; Muki Shpigel |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: The Journal of experimental biology Volume: 211 ISSN: 0022-0949 ISO Abbreviation: J. Exp. Biol. Publication Date: 2008 Jul |
Date Detail:
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Created Date: 2008-06-16 Completed Date: 2008-09-19 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0243705 Medline TA: J Exp Biol Country: England |
Other Details:
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Languages: eng Pagination: 2185-90 Citation Subset: IM |
Affiliation:
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Department of Zoology, Tel Aviv University, Tel Aviv, Israel. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Animals Energy Metabolism Kinetics Movement / physiology Oxygen Consumption* Porifera / growth & development, metabolism*, physiology Rheology Seawater |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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