Carter, Kathryn Sarah

Freshwater ecosystems are extremely important, both socially and ecologically, in Aotearoa/New Zealand. However, through detrimental practices of land-use change and the introduction of non-indigenous aquatic species, the health of freshwater areas is increasingly under threat. Coarse fish are one group of non indigenous fish that are largely perceived to have a negative effect on freshwater biodiversity and water quality. Despite this, there are people in New Zealand that value coarse fish high...

Armstrong, Sharyn G., University of Western Sydney, Hawkesbury, Faculty of Science and Technology

The lipid composition of five species of marine finfish from temperate Australian waters was determined. Claims that the lipids of Australian fish contain high levels of omega-6 fatty acids and arachidonic acid (AA) were investigated. Individual fish were analysed from samples collected at three locations and two seasons, and they were found to have fatty acid compositions of similar nutritional value to those from northern hemisphere temperate waters. Levels of AA, eicosapentaenoic acid and doc...

Jelbart, Jane E., University of Western Sydney, College of Science, Technology and Environment, School of Environment and Agriculture

Seagrass beds of Zostera capricorni are an integral part of the estuarine landscape along the east coast of Australia forming important habitats for juvenile fish and macroinvertebrates. Seagrass beds can vary in their spatial structural such as their size, shape and patchiness of seagrass cover. They can also be located within the estuarine landscape context such as their proximity to other habitats or their location within the estuary. The influence or correlation of these landscape or seascap...

Wheatley, Melissa Jane,1969-

Abstract not available

King, Alison Jane, 1974-

Abstract not available

Godard, Danielle R

Oil and gas exploration in Northern Canada uses explosive-based seismic techniques to locate hydrocarbon reserves beneath waterbodies not frozen to the bottom. The use of explosives in, or near, waterbodies has the potential to harm fishes, primarily through instantaneous pressure changes (IPCs) generated from the detonations. These IPCs can damage soft tissues through the rapid compression and expansion of the swimbladder as the pressure wave passes. In Canada, a document entitled Guidelines fo...

Hedges, Kevin James

Because differences often exist between species in their tolerances to environmental conditions, locations characterized by extreme parameter values (i.e., high temperature, low DO, high turbidity) may provide refuges from predation or competition by altering the outcome of inter-species interactions. This thesis examined the effects and relative importance of water temperature, dissolved oxygen (DO) and turbidity on habitat use by fish species and resulting changes in community composition. T...

Margolis, Leo.

During the summer of 1949 an investigation of the aerobic bacteria found in the intestines and slime of pike (Esox lucius) was commenced. The fish were obtained, by the use of gill nets, from Lake Monroe, an unpolluted lake, in the Mont Tremblant Park region of the Laurentian Mountains in Quebec. Seventeen pike were used in the study. The length and weight of each fish and the depth and temperature of the water from which the fish were taken are given in Table I.

Gignac, Sarah Jane

Common killifish, or mummichogs (Fundulus heteroclitus), are a species of estuarine teleost that are widely used in comparative physiology, toxicology and embryology. Their ability to withstand extreme environmental conditions, widespread distribution, and relatively sedentary nature, makes them ideal as sentinel species of estuarine health. However, the lack of cell lines derived from F. heteroclitus places limitations on the utility of this species in environmental research. In contrast, cell ...

Philip, Anju Mary

The primary adaptive organismal response to stress involves the activation of the hypothalamic-sympathetic-chromaffin cell (HSC) axis leading to rapid secretion of catecholamines, predominantly epinephrine. The hypothalamus-pituitary-interrenal (HPI) axis activation follows, leading to the secretion of cortisol in teleosts. Both these hormones play key roles in fueling the increased energy demand associated with stress. On prolonged exposure to periods of chronic stress, the stress response shif...

Pham, Phuc Hoang

Factors that can influence the transmission of aquatic viruses in fish production facilities and natural environment are the immune defense of host species, the ability of viruses to infect host cells, and the environmental persistence of viruses. In this thesis, fish cell lines were used to study different aspects of these factors. Five viruses were used in this study: viral hemorrhagic septicemia virus (VHSV) from the Rhabdoviridae family; chum salmon reovirus (CSV) from the Reoviridae family;...

Shank, Isabelle

Behavioural syndromes, defined as suites of correlated behaviours across different contexts, are used to characterize individual variability in behaviours. Males of the weakly electric fish species, Apteronotus leptorhynchus, produce electro-communication signals called chirps. Chirps are thought to be involved in agonistic signalling, as their relative incidence increases during agonistic conspecific interactions. However, high levels of individual variability in aggression obscure the role of ...

Nik Zad Sangsari, Homa <1965>

The quality of fish products is indispensably linked to the freshness of the raw material modulated by appropriate manipulation and storage conditions, specially the storage temperature after catch. The purpose of the research presented in this thesis, which was largely conducted in the context of a research project funded by Italian Ministry of Agricultural, Food and Forestry Policies (MIPAAF), concerned the evaluation of the freshness of farmed and wild fish species, in relation to different s...

Adams, Kimberly Joan

Mercury (Hg) is a toxic metal found at elevated concentrations throughout the world. Humans are exposed by consuming contaminated fish. State agencies warn the public to limit fish consumption from specific waterbodies when elevated Hg is detected (site-specific advisory). Some states issue warnings, advising limited consumption from any state waters since fish may contain high Hg (statewide advisory). I evaluated the accuracy of these advisory systems using estimated Hg concentrations in interm...

DeLong, Eric

Since the mid-1970s, the Ontario (Canada) Ministry of Environment (OMOE) has been collecting data on fish tissue mercury (Hg) contamination in provincial waterbodies. By 2004, approximately 160,000 fish from 86 species at over 1,600 sites were tested for Hg. This large database is primarily used to issue advisories for safe human fish consumption via publication of the biennial Guide to Eating Ontario Sport Fish. Analysis to uncover spatio-temporal trends while maximising the use of data points...

Yuille, Michael James

Species invasions are regarded as one of the most serious threats to biodiversity and native ecosystems and our ability to predict and quantify the impacts of invasive species has been an arduous task. Since the 1840s, the Laurentian Great Lakes have experienced an exponential increase in the number of identified invasive species. The most recent, Hemimysis anomala, is a littoral freshwater mysid native to the Ponto-Caspian region of Eastern Europe. They have been identified in all of the Great ...

Sharps, Angela

Cell culture systems have provided many insights into eukaryotic gene expression and other biochemical mechanisms. Since the cell represents the smallest living unit of any organism it provides a desirable in vitro system, allowing biochemical studies without the complex physiology of an entire animal. However, processes involving intracellular mechanisms, such as development, aging or carcinogenis, eventually require the analysis of the intact organism. Transgenic animals are a very promising t...

Schneider, Evan

Innovative ways to conduct disease surveillance are required to address the complexity of Ciguatera Fish Poisoning (CFP). Mixed methods were employed to explore CFP epidemiology and interdisciplinary approaches to its surveillance in the Turks and Caicos Islands (TCI). Quantitative analyses of cross-sectional data collected by the TCI’s National Epidemiology and Research Unit in 2010 demonstrated that a low percentage of residents reported lifetime histories of illness following fish consumpti...

Ostrowski, Christopher

Yersinia ruckeri is the bacterial agent causing enteric redmouth disease (ERM) in rainbow trout leading to economic losses in intensive aquaculture. There are two main serovars and several minor groups based on O-antigens. The first goal of this thesis was to examine the difference between serotypes of Y. ruckeri in the course of infection in fish by applying in vivo bioluminescent imaging in rainbow trout (Oncorhynchus mykiss) and coho salmon (Oncorhynchus kisutch). In infection trials, the bio...

Turko, Andrew

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 ...

Smyth, Eric

Humans domesticate nature to suit their needs. Such alterations can create trade-offs between human needs and ecosystem services. Quantification of these trade-offs is needed to domesticate nature more wisely. My thesis quantifies tradeoffs between invasive species control and the rehabilitation and protection of native fishes associated with the preservation and relocation of the dam on the Black Sturgeon River on the north shore of Lake Superior. I evaluated the trade-offs in terms of five...

Raghuraman, Harikrishnan

Marine capture fisheries contribute over 50% of total world fish production and more than 70% of this production is utilized for processing. The Canadian commercial fishing industry is one of the world’s most valued industries but generates large quantities of solid waste and wastewater. The increasing growth of the fish processing industry, the need for reduction of pollutants and the need to increase returns on raw material has led fish processors to adopt new ways of utilizing the wastes. In...

Sullivan Ritter, Jenna

Although quality of commercial fish oil is of the upmost importance to both suppliers and consumers, it can be difficult to maintain due to rapid lipid oxidation attributable to the high levels of EPA and DHA. Fish oil quality can be assessed in a number of ways; this paper focuses on ethyl ester (EE) content and oxidation products. Fish oil supplements are sold as both triacylglycerols (TAG) and EE. TAG products are more resistant to oxidation, have better bioavailability and are generally co...

Zhou, Liang

Reverse micelles systems AOT/isooctane was used for the concentration chymotrypsin from crude aqueous extract of red perch (intestine). The effects of pH and AOT concentration in the forward extraction step and pH and KCl concentration in the backward extraction step on the enzyme activity, purification fold and recovery yield were studied. The optimum conditions for the forward extraction were AOT concentration 20 mM and pH of 7.0 and optimum conditions for backward extraction were KCl concentr...

Smith, Eric S.

<p> The non-local fish-bone potential simulates the Pauli-exclusion principle for composite particle interactions. This model is used to calculate the phase shifts of the neutron-alpha and proton-alpha systems. We propose a local double Gaussian potential with a new parameterization by fitting to experimental results. These parameters are universal to both nucleon-alpha systems and include all partial waves, which is an improvement over previous work in the field.</p>

Quinn, Cristina L.

The accumulation of polychlorinated biphenyls (PCBs) into humans was described using CoZMoMAN, a mechanistic multimedia fate and transport model coupled to a human food chain model. Model results demonstrated that concentration-age relationships for population cross-sections and individuals over time are not equivalent and that, under steady-state conditions, the lipid-normalized concentration of PCBs in an individual does not monotonically increase with age. By considering the decades-long emis...

Wood, Benjamin

This dissertation is an in-depth study of the nineteenth-century Shalu Abbatial History, a collection of biographies of abbots and other important religious masters, or lamas, from the Tibetan monastery of Shalu, located in the Tibetan region of Tsang. Examining the History in conjunction with the autobiography of its author, Losel Tengyong (b. 1804), and vis-à-vis other texts from Shalu, reveals, I argue, that the Shalu Abbatial History is a guidebook of conduct that prescribes to the Shalu mon...

Hulsman, Mark F.

No description available.

MacPherson, Laura

No description available.

Lund, Johanna M

No description available.

Harpur, Cavan Andrews

To monitor and assess direct anthropogenic impacts on an aquatic system requires knowledge of its natural variation. The goal of this study explored natural variation in the lake fish communities of the northern Bruce Peninsula, which may act as a reference condition for other studies. The results of this study indicated there has been a shift towards more small-bodied, native species present in the fish communities, potentially a result of beaver activity in the area. A second goal was to cal...

Bari, Tanmoy

No description available.

Hupé, Ginette Jessica

Weakly electric fish produce and detect electric fields and use their electrosensory modality in a number of behaviours including navigation and communication. They can modulate their electric discharge in frequency and amplitude to produce electrocommunication signals in variable patterns during social interactions. In one model neuroethological species, Apteronotus leptorhynchus, the most commonly produced communication signal is the ‘small chirp’ – a brief 10-30ms modulation. Individuals tend...

Stenbeck, Alexander

The purpose of this thesis is to investigate the dynamics of a school of fish and design a controller to help steer the fish. Many species of fish can only live in waters of a certain temperature and will need to migrate from time to time in order to find an area with suitable temperature. The controller is designed to guide the fish as a group to an area of desired temperature. This is done in a bottom-up approach, starting from basics and explaining each part of the controller and why it is ne...

Stavnem, Ole Alexander

As the numbers of fish farms are increasing, the problems with lice are becoming of greater importance. The lice cause diseases and death, leading to loss in profit for the fish farms as well as reduction of the wild stock. To deal with this problem, many solutions have been introduced. For example, placing the fish farms on land or make the fish farms as floating concrete structures. However, these suggestions are costly. Another idea is to put a watertight skirt, a Permaskirt, around the upper...

Daniela Cruz Moreira

No description available.

Andersson, Mathias H.

There are large gaps in our understanding how fish populations are affected by the anthropogenic noise and the alteration of habitat caused by the construction and operation of offshore wind farms. These issues are of great importance as the construction of offshore wind farms will increase all over the world in the near future. This thesis studies these effects with a focus on fish. The wind turbine foundations function as artificial reefs and are colonized by invertebrates, algae and fish. The...

D’Aoust, Stephane G.

Many stream restoration efforts include placement of constructed large woody debris (LWD) habitat structures. These structures are installed in stable channels to rehabilitate summer habitat and critical overwintering refuges in streams, thus attenuating stresses on the aquatic ecosystem until logged riparian areas naturally supply mature windfalls (Slaney & Martin, 1997). This study addresses one of the main problems faced by restoration practitioners: The lack of physically based design g...

Balfry, Shannon Kathleen

Evidence for genetic differences in innate disease resistance in fish have been demonstrated, but the mechanisms responsible for these differences are not well understood. This thesis tested the hypothesis that the non-specific immune system plays a significant role in the innate disease resistance of fish. The experimental approach was to compare the activity of the non-specific immune system in different strains of fish, and to investigate correlations between this activity and innate dis...

Brauner, Colin J.

Many teleost fish haemoglobins (Hbs) exhibit a Root effect, a large Haldane effect and a low buffer capacity. This combination of characteristics influences the interaction between movements of oxygen (O₂) and carbon dioxide (CO₂) in the red cell, in the respiratory epithelium, and in the tissues. For example in rainbow trout, oxygenation of the blood at constant Pco₂ in vitro, induces a large acidosis (0.21 pH units) in the red cell. This acidosis results from the release of a large number...

Singh, Gurjeet

Salmon processing is a five hundred million dollar industry in British Columbia. This research is a part of the work undertaken in the Industrial Automation Laboratory at the University of British Columbia to develop advanced, low-cost technology for flexible automation in the fish processing industry. The scope of the research reported in this thesis is limited to the design' and development of an automated can-filling system for fish. Higher operating speeds, improved filling accuracy and...

Bussani, Franco Steven

Commercial salmon processing is a five-hundred million dollar industry in British Columbia. This research is part of the work undertaken at the Industrial Automation Laboratory of the University of British Columbia to address the need to increase the raw product recovery rate during the processing of salmon, in view of dwindling stocks and increasing production costs. The scope of this research is limited to the analysis of positioning the salmon for head removal on a conventional machine (Iron ...

Samaranayaka, Anusha Geethangani Perera

Pacific hake (Merluccius productus) is an under-valued fish with high endogenous proteolytic activity due to parasitic infection by Kudoa paniformis. The objective of this research was to produce fish protein hydrolysates (FPH) with antioxidative properties from Pacific hake and to assess their potential to inhibit oxidative processes, in vivo. Proteolytic activity of fish homogenate was optimum at pH 5.25-5.50 and 52-55°C. Significant (p<0.05) correlations were observed among fish mince K. pa...

Skinner, Lisa Ann

To prevent the outbreak of pathogenic diseases, the salmonid aquaculture industry relies on the use of vaccines. While traditional, polyvalent, oil-adjuvanted vaccines (AV) are effective, they do not work against all types of pathogens and the vaccination process and vaccine composition can be stressful for individual fish. Continuing advances in technology have led to the development of a new type of pathogen-specific vaccine; a DNA vaccine (DV). While there are many benefits to DVs, including ...

Patrzykat, Aleksander

Cationic antimicrobial peptides are components of the host innate immune response against infections in almost all species. Although innate defenses in fish are particularly important due to a frequently late onset and short duration of the secondary immune response in these animals, few fish peptides have been studied to date. This research identifies a novel Hl-histone derived cationic peptide (HSDF-1) from coho salmon (Oncorhynchus kisutch), and describes the design, as well as the anti...

Haggarty, Dana Rochelle

I investigated fish habitat evaluation methods for Burrard Inlet, British Columbia. Burrard Inlet, contains the Port of Vancouver and is surrounded by Greater Vancouver. Nearshore habitat loss and alteration are major threats to the health of the marine environment in the region. Considerable habitat has already been lost or altered in Burrard Inlet. To maintain productive fish habitat, two issues must be resolved: what metrics should be used to assess habitat; and at what scale should they...

Maheu-Giroux, Mathieu

The contribution made by fish ponds to malaria transmission in the Peruvian Amazon is controversial because previous research results have yielded mixed evidence and because the mosquito vector is known to have breeding requirements not typical of fish ponds. To examine the association between fish pond density and malaria occurrence, a retrospective 30-month cohort study was conducted involving 1,018 individuals in eight communities southwest of Iquitos (Peru), using both active ...

Richardson, Michael John

The goldfish (Carassius auratus) is a hardy exotic species that have established sporadically distributed feral populations throughout North America. In one shallow seasonally anoxic pond goldfish formed a large stunted population of 15-17,000 ind ha$ sp{-1}$, with 53% being small young of the year. Goldfish were predominantly benthic herbivores with little diet overlap with resident red-spotted newts (Notapthalmus v. viredescens). Thus in relatively simple systems lacking fish predators goldfis...

Bielanska, Magdalena M.

Terminal regions of chromosomes are frequently involved in structural chromosomal abnormalities and are prone to rearrangements. They are also gene rich, and have been shown to be associated with a number of clinical conditions. This study focuses on telomere-specific fluorescence in situ hybridization (FISH) probes. It addresses the technical aspects of their preparation and application, and examines whether FISH using these probes is a valuable tool for detection of aberrations in the terminal...

Wright, M. Elizabeth.

Arctic charr are susceptible to cestodes like Diphyllobothrium dendriticum which are transmitted through the food web. Field studies investigating Arctic charr-Diphyllobothrium relationships often provide little data from which to fully understand Diphyllobothrium transmission or to assess their impact on copepod or fish hosts. Experimental studies may, therefore, be the only direct way to investigate these issues. The research goal of this thesis was to duplicate the D. dendriticum life cycle i...