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Warmer water temperature results in oxidative damage in an Antarctic fish, the bald notothen
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2015 (English)In: Journal of Experimental Marine Biology and Ecology, ISSN 0022-0981, E-ISSN 1879-1697, Vol. 468, 130-137 p.Article in journal (Refereed) Published
Abstract [en]

Global climate change is predicted to result in increases in water temperature in the polar regions, but the full consequences of this for marine fish species are not understood, especially with regard to cellular mechanisms underlying oxidative stress. Warmer temperatures could potentially result in increased oxidative stress, and it is not known whether stenothermal fish can cope with this on a cellular and physiological level. In order to address this, we exposed bald notothen (Pagothenta borchgrevinki), a fish species endemic to Antarctica, to an increase in temperature from -1.6 degrees C to 4 degrees C and measured the effects on oxidative stress including antioxidant defenses, oxidative damage in proteins and lipids, and transcriptional regulation of involved genes. We show that the fish responds to an acute (12 h) temperature increase with increased antioxidant defenses. However, these antioxidant defenses were similar to basal levels following long-term (3 weeks) exposure to the higher temperature and moreover, these individuals also had higher levels of oxidative damage. These results indicate that this species has the ability to alter levels of endogenous antioxidants, but that this response is transient and insufficient to protect against oxidative damage. These effects may have serious consequences for these fish in a warmer future since long-term consequences of this accumulation of damaged lipids and proteins are associated with aging and known to include decreased cellular function, disease and eventually cell death. (C) 2015 Elsevier B.V. All rights reserved.

Place, publisher, year, edition, pages
2015. Vol. 468, 130-137 p.
Keyword [en]
Fish Global warming Oxidative stress Oxidative damage Polar microtiter plate assay glutathione disulfide goldfish tissues gene-expression rainbow-trout stress acclimation antioxidant performance apoptosis Environmental Sciences & Ecology Marine & Freshwater Biology
Research subject
SWEDARP 2011/12, Cardiovascular and gastrointestinal control mechanisms
Identifiers
URN: urn:nbn:se:polar:diva-2154DOI: 10.1016/j.jembe.2015.02.018OAI: oai:DiVA.org:polar-2154DiVA: diva2:851697
Funder
Swedish Polar Research Secretariat
Note

ISI Document Delivery No.: CJ8SR Times Cited: 0 Cited Reference Count: 57 Almroth, Bethanie Carney Asker, Noomi Wassmur, Britt Rosengren, Malin Jutfelt, Fredrik Grans, Albin Sundell, Kristina Axelsson, Michael Sturve, Joachim National Science Foundation; McMurdo Station; Swedish Polar Research Secretariat; Swedish Research Council Formas; Vetenskapsradet We would like to thank Inger Holmkvist and Niklas Dahr for their technical assistance and the following foundations for funding: National Science Foundation, McMurdo Station, Swedish Polar Research Secretariat, The Swedish Research Council Formas and Vetenskapsradet. [SS] 0 Elsevier science bv Amsterdam 1879-1697

Available from: 2015-09-07 Created: 2015-09-07 Last updated: 2015-11-24Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
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  • vancouver
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More styles
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