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Effects of Hypoxia on Consumption, Growth, and RNA:DNA Ratios of Young Yellow Perch

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dc.creator Roberts, James J.
dc.creator Brandt, Stephen B.
dc.creator Fanslow, David
dc.creator Ludsin, Stuart A.
dc.creator Pothoven, Steven A.
dc.creator Scavia, Donald
dc.creator Tomas O. Hook, Tomas O.
dc.date.accessioned 2012-10-22T19:46:57Z
dc.date.available 2012-10-22T19:46:57Z
dc.date.issued 2011
dc.identifier.citation Roberts, J., Brandt, S., Fanslow, D., Ludsin, S., Pothoven, S., Scavia, D., & Hook, T. (2011). Effects of hypoxia on consumption, growth, and RNA:DNA ratios of young yellow perch. Transactions of the American Fisheries Society, 140(6), 1574-1586. doi: 10.1080/00028487.2011.638576 en_US
dc.identifier.uri http://hdl.handle.net/1957/34562
dc.description This is the publisher’s final pdf. The published article is copyrighted by American Fisheries Society and can be found at: http://fisheries.org/. en_US
dc.description.abstract As in various freshwater and coastal marine ecosystems worldwide, seasonal bottom water hypoxia is a recurring phenomenon in Lake Erie's central basin. While bottom hypoxia can strongly affect sessile benthic animals, its effects on mobile organisms such as fish are less understood. We evaluated the potential for bottom hypoxia to affect the growth rates of yellow perch Perca flavescens, a species of ecological and economic importance in the lake. To this end, we (1) conducted laboratory experiments to quantify the effects of reduced dissolved oxygen on consumption, somatic growth, and RNA: DNA ratios (an index of short-term growth) of young yellow perch and (2) explored the effects of bottom hypoxia on young yellow perch growth in Lake Erie's central basin by collecting individuals in hypoxic and normoxic regions of the lake and quantifying their RNA: DNA ratios. Yellow perch consumption and growth in our experiments declined under hypoxic conditions (<= 2 mg O-2/L). While yellow perch RNA: DNA ratios responded strongly to experimental temperature, nucleic acid ratios were not significantly affected by dissolved oxygen or feeding ration. We did, however, observe a positive correlation between yellow perch growth and RNA: DNA ratios at low temperatures (11 degrees C). The nucleic acid ratios of yellow perch collected in Lake Erie varied spatiotemporally, but their patterns were not consistent with hypoxia. In short, while yellow perch consumption and growth rates respond directly and negatively to low oxygen conditions, these responses are not necessarily reflected in RNA: DNA ratios. Moreover, in central Lake Erie, where yellow perch can behaviorally avoid hypoxic areas, the RNA: DNA ratios of yellow perch do not respond strongly to bottom hypoxia. Thus, this study suggests that there is no strong negative effect of bottom hypoxia on the growth of young yellow perch in Lake Erie. en_US
dc.description.sponsorship This work was conducted as part of the International Field Years on Lake Erie (IFYLE) program, supported by NOAA-GLERL, NOAA National Sea Grant (to T. H¨o¨ok), and the U.S. Environmental Protection Agency Great Lakes National Program Office and in part by NOAA Center for Sponsored Coastal Ocean Research grant NA07OAR432000. en_US
dc.language.iso en_US en_US
dc.publisher American Fisheries Society en_US
dc.relation.ispartofseries Transactions of the American Fisheries Society en_US
dc.relation.ispartofseries Vol. 140 no. 6 en_US
dc.subject RNA-DNA ratios en_US
dc.subject Cisco Coregonus-artedi en_US
dc.subject Dissolved oxygen en_US
dc.subject Nucleic acid en_US
dc.subject Lake Erie en_US
dc.subject Hypolimnetic oxygenation en_US
dc.subject Vertical distribution en_US
dc.subject Fish bioenergetics en_US
dc.subject Aquaculture ponds en_US
dc.subject Winter flounder en_US
dc.title Effects of Hypoxia on Consumption, Growth, and RNA:DNA Ratios of Young Yellow Perch en_US
dc.type Article en_US
dc.description.peerreview yes en_US
dc.identifier.doi 10.1080/00028487.2011.638576

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