Investigating factors within the parental environment that influence the fitness of a freshwater gastropod species and their sensitivity to metal exposure

dc.contributor.advisorProsser, Ryan
dc.contributor.authorOsborne, Rebecca
dc.date.accessioned2024-01-04T21:55:30Z
dc.date.available2024-01-04T21:55:30Z
dc.date.copyright2023-12
dc.date.created2023-09-26
dc.degree.departmentSchool of Environmental Sciences
dc.degree.grantorUniversity of Guelph
dc.degree.nameDoctor of Philosophy
dc.degree.programmeEnvironmental Sciences
dc.description.abstractTo effectively assess and manage the risks posed by chemicals in the environment, toxicological data must accurately represent the adverse effects that may occur in environmentally relevant exposure scenarios. An increasing weight of evidence suggests that certain chemicals can cause lasting adverse outcomes on populations long after the initial exposure had ended. These latent or transgenerational effects may alter the fitness of subsequent generations of organisms without direct exposure. To understand the influence of the parental environment, including exposure history, as a factor in offspring fitness and sensitivity to metals, the life history of the model gastropod Planorbella pilsbryi was thoroughly characterized. Organism sensitivity to metals was established and compared with the sensitivity of juveniles born to Cu-exposed parents. It was found that juveniles born to Cu-exposed parents were significantly more sensitive to subsequent Cu exposures than offspring born to unexposed parents. Mechanistic investigations of the bioaccumulation and direct maternal transfer of Cu indicated that maternal transfer of Cu to egg masses did correspond with trends in transgenerational effects. However, investigations of altered energy budgets and stress responses as mechanisms of the documented transgenerational effects were inconclusive.
dc.description.embargo2024-12-02
dc.identifier.citationR.K. Osborne, Ijzerman, M.M., Venier, C., Prosser, R.S. (2023). Development of an embryo toxicity test to assess the comparative toxicity of metal exposure on different life stages of freshwater gastropods. Environmental Toxicology and Chemistry, 42(8), 1791-1805. https://doi.org/10.1002/etc.5686
dc.identifier.urihttps://hdl.handle.net/10214/28036
dc.language.isoen
dc.publisherUniversity of Guelph
dc.rightsAttribution-NonCommercial-ShareAlike 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by-nc-sa/4.0/
dc.subjectEcotoxicology
dc.subjectFreshwater gastropods
dc.subjectMetals
dc.subjectTransgenerational effects
dc.titleInvestigating factors within the parental environment that influence the fitness of a freshwater gastropod species and their sensitivity to metal exposure
dc.typeThesis

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