Browsing by Author "Holdway, Douglas"
Now showing items 1-15 of 15
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The anti-estrogenic and liver metabolic effects of DHAA in rainbow trout (oncorhynchus mykiss)
Pandelides, Zacharias (2011-08-01)Recent studies have shown that dehydroabietic acid (DHAA), a resin acid present in pulp and paper mills, may have anti-estrogenic effects in fish. A chronic-exposure toxicity experiment using immature rainbow trout (Oncorhynchus ... -
Bioelectrical impedance analysis as a predictor of fish health and energy content in juvenile rainbow trout (Oncorhynchus mykiss)
Durante, Jason K. (2016-12-14)Assessing the health of a fish is an essential part to aquaculture and fish research. This is traditionally done by measuring body content using bomb calorimetry or proximate composition analysis; however, both of these ... -
Chronic effects of single intra-peritoneal injection of endosulfan on rainbow trout (Oncorhynchus mykiss) and field observations of caged rainbow in Oshawa Creek
Armour, Jeffrey Andrew (2009-08-01)The organochlorine pesticide endosulfan has been shown to be highly toxic to fish and there is some evidence to support that it may act as an endocrine disrupting chemical. Juvenile rainbow trout (Oncorhynchus mykiss) were ... -
Chronic toxicity of phthalates, biphenol and a Canadian bottled water stored under different light regimes using the Cnidarian Hydra Viridissima©
Ganeshakumar, Mathumai (2009-08-01)There is general concern whether human exposure to selected Canadian bottled waters and the chemicals which may leach from them, could potentially cause deleterious effects. This research was designed to determine whether ... -
The ecotoxicological effects of metformin and its metabolite, guanylurea, on Japanese medaka (Oryzias latipes)
Ussery, Erin (2018-08-01)Human pharmaceutical waste threatens many natural processes of non-target aquatic organisms, through the introduction of such contaminants into the environment. Pharmaceuticals are a large and diverse groups of medicinal ... -
The Effects of 17α-Ethinylestradiol (EE2) and Hydroxypropyl-β-Cyclodextrin (HPβCD) on the heart rate and metabolism of Embryonic Japanese Medaka (Oryzias latipes)
Anderson, Jordan (2019-04-01)Estrogen toxicity has been an area of priority in aquatic toxicology over the last 20 years. The toxicity of a known estrogen mimic, 17α-ethinylestradiol (EE2), has been attributed to classical estrogen signaling within ... -
Effects of chronic exposure to ibuprofen and naproxen on Florida flagfish (Jordanella floridae) over one complete life-cycle
Nesbitt, Richard (2011-08-01)Nonsteroidal anti-inflammatory drugs (NSAIDs) are a class of drugs prescribed to relieve pain, fever and inflammation, and are among the most commonly consumed medications in Ontario. Approximately 70% of the ingested dose ... -
The effects of Hydroxypropyl-β-Cyclodextrin on the American Flagfish (Jordanella floridae) over one complete life-cycle
Anderson, Jordan (2013-08-01)Understanding the impacts of pharmaceuticals and personal care products (PPCPs) on aquatic ecosystems is an important issue in aquatic toxicology. Many PPCPs have been shown to cause effects on aquatic biota within detected ... -
Effects of ibuprofen on Rainbow Trout (Oncorhynchus mykiss) following acute and chronic waterborne exposures
Robichaud, Monique (2011-08-01)Pharmaceuticals and personal care products are a growing concern in the aquatic environment. Compounds from the class of non-steroidal anti-inflammatory drugs are commonly detected in surface waters and have the potential ... -
The effects of select non-steroidal anti-inflammatory drugs on green and brown hydra
Versteeg, Sarah (2014-04-01)Effluent pharmaceuticals are released at low concentrations into aquatic ecosystems through waste water treatment plants (WWTPs). Non-steroidal anti-inflammatory drugs (NSAIDs) are important contaminants in water cycles. ... -
Examining swim bladder inflation failure as a toxicological endpoint in Japanese medaka (Oryzias latipes)
Pandelides, Zacharias (2017-11-01)Inadequate swim bladder inflation, while not being lethal itself, can have serious long-term effects on fish populations. Many environmental contaminants can inhibit swim bladder inflation of larval fish. Understanding how ... -
Growth, survivability, and reproductive effects of pulse-dosed endosulfan on jordanella floridae (florida flagfish) over one complete life-cycle
Beyger, Lindsay Alexandra (2009-08-01)Endosulfan is a commonly used organochlorine in Durham Region, Ontario Canada which has known toxic effects on non-target organisms including fish. This research investigated the effects of endosulfan on Florida flagfish ... -
The impact of restricted ration and chemical stressors on Rainbow trout (Oncorhynchus mykiss) and American flagfish (Jordanella floridae)
Beyger, Lindsay Alexandra (2017-12-01)This research aimed to increase the understanding of the impact of multiple factors including both environmental and chemical stressors and their effects on fish survival, growth, and reproduction. Rainbow trout (Oncorhynchus ... -
The toxicity of Harmony Landfill Leachate to Green Hydra (Hydra viridiisma)
Ginou, Carrie (2010-08-01)Harmony Landfill is a former industrial waste disposal site located adjacent to Harmony Creek in Oshawa, Ontario, Canada. During active disposal, from 1957 until 1980, approximately 1 million tonnes of waste were land-filled ... -
Use of bioelectrical impedance analysis (BIA) to predict water and energy content of juvenile Rainbow Trout (Oncorhynchus mykiss)
Bourdages, Christopher (2011-08-01)Accurate measurements of energy content and body composition are essential to effectively assess the well-being of fish. Bomb calorimetry and proximate analysis are currently the most dependable and accurate methods to ...