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dc.contributor.supervisor Podemski, Cheryl (Entomology) en_US
dc.contributor.author Wetton, Michelle Sandra
dc.date.accessioned 2013-01-08T20:06:44Z
dc.date.available 2013-01-08T20:06:44Z
dc.date.issued 2013-01-08
dc.identifier.uri http://hdl.handle.net/1993/14428
dc.description.abstract This study combined sedimentation, sediment chemistry and benthic community data from three Oncorhynchus mykiss cage farms in Ontario, along with a laboratory bioassay to examine the effects of aquaculture waste loading. Waste loading rates, as well as sediment TC, TN, TP and metal (Cu, Zn) concentrations were highest beneath the cage and decreased exponentially with distance. During the 21-day bioassay, Tubifex (Oligochaeta, Naididae), Chironomus (Diptera, Chironomidae) and Sphaerium (Bivalvia, Pisidiidae) were subjected to a gradient of waste loading. Survival and growth of Sphaerium simile was highest at intermediate levels of waste loading. Chironomus riparius growth increased with increasing waste addition. Tubifex tubifex growth increased with exposure to fish waste, compared with the control. Until this study, there were no predictions for thresholds of effect at freshwater cage farms in the literature. The proposed threshold of effect on freshwater benthos is 2.0 - 3.0 g C m-2 day-1. en_US
dc.rights info:eu-repo/semantics/openAccess
dc.subject aquaculture en_US
dc.subject freshwater en_US
dc.subject benthic en_US
dc.subject invertebrate en_US
dc.subject sedimentation en_US
dc.subject sediment en_US
dc.title Effect of waste loading from freshwater cage aquaculture on benthic invertebrates and sediment chemistry en_US
dc.type info:eu-repo/semantics/masterThesis
dc.degree.discipline Entomology en_US
dc.contributor.examiningcommittee Galloway, Terry (Entomology) Hann, Brenda (Biological Sciences) en_US
dc.degree.level Master of Science (M.Sc.) en_US
dc.description.note February 2013 en_US


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