Toxicology of Model Naphthenic Acids in the Great Pond Snail Lymnaea stagnalis

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atmire.migration.oldid3186
dc.contributor.advisorWildering, Willem
dc.contributor.authorJohnston, Christina
dc.date.accessioned2015-05-01T17:33:57Z
dc.date.available2015-06-22T07:00:49Z
dc.date.issued2015-05-01
dc.date.submitted2015en
dc.description.abstractNaphthenic acids (NAs), carboxylic acids with large aliphatic tail groups, are an important class of oil sands tailings pond toxins. In this study, the effects of a mixture of model NAs on the pond snail Lymnaea stagnalis were examined during various life stages. Hatching rate was progressively affected over a range of 20-75 mg/L NAs, while embryo somatic growth was progressively affected over a range of 30-75 mg/L NAs. My data also provides evidence that NA molecular geometry is a factor in selective permeability of NAs into Lymnaea’s gelatinous egg masses. Adult survival, growth, feeding, fecundity and behavior were progressively affected over a range of 10-50 mg/L NAs, but not at 0.1-4 mg/L NAs. Taken together, my data support the conclusion that low molecular weight NAs have a negative impact on various physiological and behavioral aspects of this freshwater gastropod that escalates over a range of environmentally realistic doses.en_US
dc.identifier.citationJohnston, C. (2015). Toxicology of Model Naphthenic Acids in the Great Pond Snail Lymnaea stagnalis (Master's thesis, University of Calgary, Calgary, Canada). Retrieved from https://prism.ucalgary.ca. doi:10.11575/PRISM/28492en_US
dc.identifier.doihttp://dx.doi.org/10.11575/PRISM/28492
dc.identifier.urihttp://hdl.handle.net/11023/2220
dc.language.isoeng
dc.publisher.facultyGraduate Studies
dc.publisher.institutionUniversity of Calgaryen
dc.publisher.placeCalgaryen
dc.rightsUniversity of Calgary graduate students retain copyright ownership and moral rights for their thesis. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission.
dc.subjectPhysiology
dc.subject.classificationToxicologyen_US
dc.subject.classificationNaphthenic Acidsen_US
dc.subject.classificationLymnaeaen_US
dc.subject.classificationsnailen_US
dc.subject.classificationoil sandsen_US
dc.subject.classificationWateren_US
dc.subject.classificationReclamationen_US
dc.subject.classificationTailings Ponden_US
dc.subject.classificationPollutionen_US
dc.subject.classificationmembrane disruptionen_US
dc.titleToxicology of Model Naphthenic Acids in the Great Pond Snail Lymnaea stagnalis
dc.typemaster thesis
thesis.degree.disciplineBiological Sciences
thesis.degree.grantorUniversity of Calgary
thesis.degree.nameMaster of Science (MSc)
ucalgary.item.requestcopytrue
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