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INTEGRATION OF BEHAVIOURAL, PHYSIOLOGICAL, AND MORPHOLOGICAL PHENOTYPES IN THE AMPHIBIOUS FISH KRYPTOLEBIAS MARMORATUS

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dc.contributor.advisor Wright, Pat
dc.contributor.author Turko, Andrew
dc.date.accessioned 2011-12-23T17:26:51Z
dc.date.available 2011-12-23T17:26:51Z
dc.date.copyright 2011-12
dc.date.created 2011-12-19
dc.date.issued 2011-12-23
dc.identifier.uri http://hdl.handle.net/10214/3216
dc.description.abstract The self-fertilizing mangrove rivulus, Kryptolebias marmoratus, is an amphibious fish capable of reversible gill remodelling when moving between aquatic and terrestrial environments. In this thesis I determined how plastic morphological and physiological respiratory traits were integrated during transitions between environments. In two isogenic lineages, I found that behaviour (increased emersion) of individual fish caused gill morphological changes (enlargement of the interlamellar cell mass (ILCM)) that reduced gill surface area. I also found that large ILCMs that formed after 7 d of air exposure increased both gill ventilation and critical oxygen tension (Pcrit) when fish returned to water. These results indicate that large ILCMs reduce aquatic respiratory function, and increased gill ventilation was unable to maintain oxygen uptake at extreme levels of hypoxia. Ultimately, this study highlights the trade-offs in gill structure and function during the transition between air and water, and demonstrates that differences in behaviour can generate morphological variation. en_US
dc.language.iso en en_US
dc.subject Phenotypic plasticity en_US
dc.subject respiration en_US
dc.subject gill remodelling en_US
dc.subject mangrove rivulus en_US
dc.subject Kryptolebias marmoratus en_US
dc.subject amphibious fish en_US
dc.title INTEGRATION OF BEHAVIOURAL, PHYSIOLOGICAL, AND MORPHOLOGICAL PHENOTYPES IN THE AMPHIBIOUS FISH KRYPTOLEBIAS MARMORATUS en_US
dc.type Thesis en_US
dc.degree.programme Integrative Biology en_US
dc.degree.name Master of Science en_US
dc.degree.department Department of Integrative Biology en_US
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