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Article: Bioenergetics and RNA/DNA ratios in the common carp (Cyprinus carpio) under hypoxia

TitleBioenergetics and RNA/DNA ratios in the common carp (Cyprinus carpio) under hypoxia
Authors
KeywordsBioenergetics
Biomarker
Hypoxia
RNA/DNA ratio
Scope for growth
Issue Date2001
PublisherSpringer Verlag. The Journal's web site is located at http://link.springer.de/link/service/journals/00360/index.htm
Citation
Journal Of Comparative Physiology - B Biochemical, Systemic, And Environmental Physiology, 2001, v. 171 n. 1, p. 49-57 How to Cite?
AbstractHypoxia caused by eutrophication occurs over large areas in aquatic systems worldwide. Common carp (Cyprinus carpio) exposed to hypoxia (1 mg · O2 · 1-1 and 2 mg · O2 · 1-1) for 1 week showed a significant reduction in feeding rate, respiration rate, faecal production and nitrogenous excretion compared to those maintained at normoxia (7 mg · O2 · 1-1). Fish exposed to hypoxia showed negative scope for growth (SfG), but no significant difference in the specific growth rate was revealed after 1 week in both hypoxic groups. A significant reduction in RNA/DNA ratio was, however, clearly evident in the white muscle of the 1 mg · O2 · 1-1 treatment group, but not in the 2 mg · O2 · 1-1 treatment group. Both specific growth rate and RNA/DNA ratio were significantly reduced when fish were exposed to severe hypoxia (0.5 mg · O2 · 1-1) for 4 weeks. At all levels of hypoxia, growth reduction was accompanied by a significant decrease in RNA/DNA ratio in white muscle. Covariance analysis showed no significant difference between the slope of RNA/DNA ratio and growth rate under normoxic conditions and 0.5 mg · O2 · 1-1 for 4 weeks (F = 1.036, P > 0.326), as well as 1.0 mg · O2 · 1-1 and 2.0 mg · O2 · 1-1 for 1 week (F = 0.457, P > 0.5), indicating that the RNA/DNA ratio serves as a biomarker of growth under all oxygen levels, at least under controlled experimental conditions. SfG also appears to be more sensitive than the RNA/DNA ratio in responding to hypoxia in fish.
Persistent Identifierhttp://hdl.handle.net/10722/92749
ISSN
2015 Impact Factor: 1.884
2015 SCImago Journal Rankings: 1.126
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorZhou, BSen_HK
dc.contributor.authorWu, RSSen_HK
dc.contributor.authorRandall, DJen_HK
dc.contributor.authorLam, PKSen_HK
dc.date.accessioned2010-09-17T10:56:02Z-
dc.date.available2010-09-17T10:56:02Z-
dc.date.issued2001en_HK
dc.identifier.citationJournal Of Comparative Physiology - B Biochemical, Systemic, And Environmental Physiology, 2001, v. 171 n. 1, p. 49-57en_HK
dc.identifier.issn0174-1578en_HK
dc.identifier.urihttp://hdl.handle.net/10722/92749-
dc.description.abstractHypoxia caused by eutrophication occurs over large areas in aquatic systems worldwide. Common carp (Cyprinus carpio) exposed to hypoxia (1 mg · O2 · 1-1 and 2 mg · O2 · 1-1) for 1 week showed a significant reduction in feeding rate, respiration rate, faecal production and nitrogenous excretion compared to those maintained at normoxia (7 mg · O2 · 1-1). Fish exposed to hypoxia showed negative scope for growth (SfG), but no significant difference in the specific growth rate was revealed after 1 week in both hypoxic groups. A significant reduction in RNA/DNA ratio was, however, clearly evident in the white muscle of the 1 mg · O2 · 1-1 treatment group, but not in the 2 mg · O2 · 1-1 treatment group. Both specific growth rate and RNA/DNA ratio were significantly reduced when fish were exposed to severe hypoxia (0.5 mg · O2 · 1-1) for 4 weeks. At all levels of hypoxia, growth reduction was accompanied by a significant decrease in RNA/DNA ratio in white muscle. Covariance analysis showed no significant difference between the slope of RNA/DNA ratio and growth rate under normoxic conditions and 0.5 mg · O2 · 1-1 for 4 weeks (F = 1.036, P > 0.326), as well as 1.0 mg · O2 · 1-1 and 2.0 mg · O2 · 1-1 for 1 week (F = 0.457, P > 0.5), indicating that the RNA/DNA ratio serves as a biomarker of growth under all oxygen levels, at least under controlled experimental conditions. SfG also appears to be more sensitive than the RNA/DNA ratio in responding to hypoxia in fish.en_HK
dc.languageengen_HK
dc.publisherSpringer Verlag. The Journal's web site is located at http://link.springer.de/link/service/journals/00360/index.htmen_HK
dc.relation.ispartofJournal of Comparative Physiology - B Biochemical, Systemic, and Environmental Physiologyen_HK
dc.subjectBioenergeticsen_HK
dc.subjectBiomarkeren_HK
dc.subjectHypoxiaen_HK
dc.subjectRNA/DNA ratioen_HK
dc.subjectScope for growthen_HK
dc.titleBioenergetics and RNA/DNA ratios in the common carp (Cyprinus carpio) under hypoxiaen_HK
dc.typeArticleen_HK
dc.identifier.emailWu, RSS: rudolfwu@hku.hken_HK
dc.identifier.authorityWu, RSS=rp01398en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1007/s003600000149en_HK
dc.identifier.pmid11263726-
dc.identifier.scopuseid_2-s2.0-0035135035en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0035135035&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume171en_HK
dc.identifier.issue1en_HK
dc.identifier.spage49en_HK
dc.identifier.epage57en_HK
dc.identifier.isiWOS:000166902000006-
dc.publisher.placeGermanyen_HK
dc.identifier.scopusauthoridZhou, BS=7401906781en_HK
dc.identifier.scopusauthoridWu, RSS=7402945079en_HK
dc.identifier.scopusauthoridRandall, DJ=7202208365en_HK
dc.identifier.scopusauthoridLam, PKS=7202365776en_HK

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