Zare, Zahra

Tuna is highly perishable and has been implicated in histamine poisoning because of high histidine levels in the muscle. There is high demand for fresh tuna fillet and steaks for Japanese type foods, and as a grilled item in restaurants. Demand for fresh, additive-free and safe seafood products has stimulated efforts to discover novel methods to prolong the shelf life of fresh products with minimum loss of quality. High pressure processing was investigated for its effects on quality and usefu...

Evans, John. W.

The regulation of any fishery depends for its direction upon the knowledge of the biology of the fish involved. The flying fish, Hirundichthys affinis, is the main source of animal protein available to the 210,000 people living on the island of Barbados. This is only the first in a series of studies sponsored by the Barbados Government in the attempt to intelligently regulate this essential fishery. This work deals with the development of the flying fish from the freshly fertilized egg up to the...

Blackett, Andrew W.

A numerical model of the Strait of Georgia, British Columbia was used to investigate the possibility that wind induced entrainment enhances the survival of fish which spend their early lives in the area, by supplying nitrate rich deep water to the photic zone and increasing primary productivity. Historical records of winds and Fraser River discharge were used to drive the combined GF4/MULES physical/biological model, to simulate entrainment and nitrate concentration in the upper layer of the Str...

Ofori, Rosemary Anima.

Gelatin was extracted from shark and salmon skins by an enzyme aided process. A three factor, two level central composite rotatable design was used to optimize the process. The factors were namely, enzyme: dry fish skin weight ratio, incubation time, and temperature. The data were analyzed by response surface methodology to determine the optimum conditions for the deproteinization, demineralization and extraction process variables. / Optimum conditions for deproteinization of shark skin by tryps...

Downing, Gavin

In a three year study, the applicability of the cortisol response to capture as a biomarker of the health of fish from areas chronically exposed to pollution was assessed. Northern pike (Esox lucius) and yellow perch (Perca flavescens) captured from an area contaminated by bleached kraft pulp mill effluent (BKME) were initially found to be incapable of elevating their blood cortisol concentration to reference levels. Following a reduction of the amount of absorbable organochlorines (AOX) in the ...

Geraci, Joseph R.

No description available.

Tanna, Rajiv Neal

The Grand River watershed is the largest watershed in southern Ontario, and is expected to see major development and urban densification over the next 20 years. An expected 57% increase in population over the next two decades in urban centers such as Kitchener – Waterloo, Cambridge, Guelph and Brantford means an added load on the existing 30 wastewater treatment facilities serving the watershed. A subsequent increase in the amount of average flow and effluent released into the Grand River via th...

Mader Monaghan, S. Richelle

Microsporidia are a group of obligate intracellular fungal parasites that infect a wide range of vertebrates and invertebrates, and are of economic and academic interest. Some areas of their economic impact are in aquaculture where they can infect salmon and other fish species. In agriculture they have been considered as control agents for insect pests, but more importantly as likely contributing to colony collapse disorder of bees. As an academic topic, microsporidia are fascinating because th...

Poste, Amanda

Eutrophication of freshwater lakes has led to an increase in the occurrence of harmful cyanobacterial blooms, and it is expected that a warming climate will further exacerbate the frequency and duration of such blooms. Microcystin is a cyanobacterial hepatotoxin that is found worldwide, and poses a serious threat to the ecological communities in which it is found as well as to those who use these waters for drinking, recreation, or as a food source. Although microcystin is known to accumulate in...

Wang, Shuang

The feasibility of using solid phase micro-extraction (SPME) as an in vivo sampling tool for analysis of trace environmental contaminants in fish exposed to municipal wastewater effluents (MWWEs) was validated using controlled laboratory and field experiments. SPME was compared with traditional extraction techniques， including solid phase extraction (SPE) in water and solid-liquid extraction (SLE) in fish tissues to assess relative efficiencies. All three techniques were used to quantify the pr...

Shen, Wei

Myopia is a common ocular condition worldwide and the mechanism of myopia is still not clear. A number of animal models of myopia and refractive error development have been proposed. The fact that form deprivation myopia could be induced in tilapia fish, as shown previously in my research, suggests the possibility that tilapia could be a new animal model for myopia research. In the first part of this thesis the tilapia model was perfected and then, based on this model, the effect of systemic ...

DeWitte-Orr, Stephanie

Understanding basic antiviral mechanisms in vertebrates is essential for developing methods to enhance antiviral responses and promote human and animal health. In fish these antiviral mechanisms are poorly understood, but are important to understand because of the devastating impact of viral diseases on aquaculture. Therefore, the antiviral responses of a rainbow trout macrophage-like cell line, RTS11, and two non-immune cell lines, the rainbow trout fibroblast RTG-2 and Chinook salmon emb...

Zhou, Jun Jay

As the largest unexplored area on earth, the underwater world has unlimited at traction to marine scientists. Due to the complexity of the underwater environment and the limitations of human divers, underwater exploration has been facilitated by the use of submarines, Remotely Operated Vehicles (ROVs) and Autonomous Underwater Vehicles (AUVs). In recent years, use of autonomous control systems being integrated with visual sensors has increased substantially, especially in marine applications inv...

Garner, Megan

Corrugated steel pipe (CSP) culverts are widely used as an economical alternative for conveying streams and small rivers through road embankments. While passage of the design flow is generally the primary goal for culvert design, consideration must also be given to maintaining connectivity within the aquatic environment for fish and other aquatic organisms. In Canada, the design criteria for fish passage through culverts are generally specified in terms of a maximum mean flow velocity correspond...

Jones, Christina Michelle

Mercury (Hg) is a toxic metal that is found in aquatic food webs and is hazardous to humans. An emerging conceptual model predicts areas with the potential to contain food webs with elevated concentrations of Hg receive high amounts of Hg and sulfate deposition, have high coverage of forests and wetlands and low coverage of agriculture. The objective of this study was to test this conceptual model using concentrations of Hg in fish in the south central United States. Coverage by evergreen forest...

Tweedy, Brent Norris

Methyl mercury (MeHg) is an environmental contaminant affecting the health of wildlife. It was once thought that only aquatic consumers were at risk of MeHg contamination, but we now know emergent insects transport MeHg from aquatic systems to terrestrial food webs (MeHg flux). Factors regulating MeHg flux in emergent insects are currently unknown. This study tests the hypothesis that fish predation regulates insect emergence and flux of MeHg. The experiment utilized five ponds stocked with fish...

Ozen, Arda

In this study, the hydrology and physical, chemical and biological variables of a shallow lake system including the Lakes Mogan and Eymir between 1997-2005 were evaluated. In Lake Eymir, a biomanipulation study was conducted between August, 1998 &ndash / December, 1999. Upon biomanipulation, Lake Eymir shifted to clearwater state with submerged vegetation domination during 2000-2003. However, in 2004, the lake shifted back to algae-dominated turbid state since the buffer mechanisms provided by...

Rafaela Alcina Araújo dos Santos

No description available.

Fish is classed as a major allergenic food under the Food Allergen Labeling and Consumer Protection Act (FALCPA), which requires accurate information on food allergens to be included in the label of food products. Fishmeal, a fish by-product, is a common protein source in animal feed but it has been banned for use in ruminant feed under the transmissible spongiform encephalopathy regulations in European Union, Japan and Australia. Currently, there is no convenient and reliable method available f...

Brownell, Lindsay Kirlin

Thesis: S.M. in Science Writing, Massachusetts Institute of Technology, Department of Humanities, Graduate Program in Science Writing, 2014. / Cataloged from PDF version of thesis. / Includes bibliographical references (pages 23-24). / In today's increasingly digitized, data-driven world, the "old ways" of doing things, especially science, are quickly abandoned in favor of newer, ostensibly better methods. One such discipline is the ancient study of taxonomy, the discovery and organization of li...

Rinne, John N.

From the Proceedings of the 2001 Meetings of the Hydrology Section - Arizona-Nevada Academy of Science - April 14, 2001, University of Nevada, Las Vegas

ŠMEJKAL, Marek

The dissertation thesis focuses on predator ecology in artificial water bodies. Paper I deals with the importance of chemical cues for predator-prey interactions in an aquatic environment. Here, I demonstrate that the ability to detect chemical cues represents a survival benefit for prey species. Paper II points out gillnet methodological bias, which may have subsequent repercussions in field evaluation of a predator's presence and assessment of larger fish abundance in general. Papers III and I...

Pennock, Casey A.

Master of Science / Department of Biology / Keith B. Gido / Fishways are a common tool for mitigating the effects of habitat fragmentation on fish communities, but their utility in low-gradient, sand-bed rivers of the Great Plains is not well studied. The Lincoln Street Fishway on the Arkansas River became operational in 2015 and was built specifically to pass small-bodied threatened fishes. We used a combination of surveys up-and downstream of the barrier and tagging experiments to test the abi...

Kong, Kai Yip

No description available.

March, Beryl Elizabeth

Fish meals, particularly British Columbia herring meals, and condensed herring solubles have been studied for their nutritive properties as supplements in poultry rations. Both commercially and experimentally prepared herring meals were used in the study. Protein quality in fish meals was investigated to ascertain what degree of variability exists in commercial samples and to obtain information regarding the effects of raw material, processing temperature and storage. On the basis of the Prote...

Aiken, James

Small temperate lakes are under increasing pressure from a number of anthropogenic sources, including but not limited to: habitat alteration, invasive species, climate change, and pollution. In Gatineau Park, Quebec, Canada small temperate lakes have been demonstrated to be under threat from introduced piscivores, among other potential stressors. Here, I assessed the historical impact of four introduced piscivores on minnow, small fish and total fish species richness for a set of small Gatineau ...

Leung, Siu Ying

No description available.

Arunachalam, Subbiah, Balaji, Jayashree

Fish and aquaculture research in the Peopleâ s Republic of China over the six years 1994-1999 has been mapped using data from six databases â three abstracting services and three citation indexes. The results are compared with fish science research in India. During the six years China has published 2035 papers (roughly 4.5 â 5% of the world output) and India 2454. More than 95% of Chinaâ s papers are journal articles, compared to 82.8% of Indian papers. About 78% of Chinaâ s journal paper ...

Oxendine, Sharon L. Padilla, Stephanie.

Thesis (Ph. D.)--University of North Carolina at Chapel Hill, 2006. / Title from electronic title page (viewed Oct. 10, 2007). "... in partial fulfillment of the requirements for the degree of Doctor of Philosophy in the Curriculum of Toxicology." Discipline: Toxicology; Department/School: Medicine.

Sharma, Sapna.

Thesis (M. Sc.)--University of Toronto, 2004. / Adviser: Donald Jackson.

Knight, Amelia Cassidy. Terhune, Jeffery S.,

Thesis (M.S.)--Auburn University, 2008. / Abstract. Includes bibliographical references (p. 43-52).

Campora, Cara Empey

Thesis (Ph.D.)--University of Hawaii at Manoa, 2008. / Harmful algal blooms (HABs) are associated with several acute and chronic diseases in humans worldwide, which are characterized by gastrointestinal, neurological, and/or cardiovascular disturbances. Ciguatera fish poisoning, the most commonly reported marine toxin disease in the world, is the primary and most important human health manifestation of HAB and results from the consumption of fish containing high levels of ciguatoxins (CTXs), a f...

Schau, Erwin Andreas Meissner

Sustainable development embraces economics, society and nature and is the global context for this PhD-thesis. Modern fishery is dependent on fossil fuels, which use is the antithesis of sustainable fishery. Environmental degradation is closely related to health aspects, which are increasingly important to consumers and other stakeholders. For the fish food product (FFP), the main focus of prior research has been on threatened stock populations. Less attention has been focused on environmental pr...

White, Richard Stuart Alan

For many species, distribution and abundance is driven by a trade-off between abiotic and biotic stress tolerance (i.e. physical stress versus competition or predation stress). This trade- off may be caused by metabolic rate differences in species such that slow metabolic rates increase abiotic tolerance but decrease biotic tolerance. I investigated how metabolic rate differences were responsible for an abiotic-biotic tolerance trade-off in brown...

Bacher, Kathrin

Tesi realitzada al Centre d'Estudis Avançats de Blanes (CEAB-CSIC) / The overarching goal of this doctoral thesis was to advance the understanding of the interactions between marine fish farming, wild fish populations, the local small-scale fishery and the society. This thesis was designed as a multi-disciplinary study and is divided into three different sections: ecology (chapter 1 and 2), fisheries (chapter 3) and social science (chapter 4). In the ecological part we examined the spatial and...

Foster, Sarah Jane

My research, focused on the industrial shrimp fishery in southern Gulf of California, aimed to determine whether tropical shrimp trawling is a problem for viability of incidentally captured small fish species. My first objective was to use life history information to evaluate possible impacts on four small fish species from their incidental capture. I applied length based indicators and qualitative criteria to information on captured sizes, reproduction, and distributions across the study site. ...

Weech, Shari Ann

Previous studies have shown that fish-eating wildlife risk elevated methylmercury (meHg) exposure in environments where Hg concentrations, chemical speciation, and/or water chemistry favor Hg methylation and accumulation in fish. Prior to this study, however, it was not known whether Hg from a natural geologic source or contamination resulting from Hg-mining activities would bioaccumulate through the aquatic food chain to concentrations critical to fish-eating bird survival and reproduction...

DeBlois, Elisabeth M.

The character and magnitude of predation by Calliopius laeviusculus on the intertidal eggs of capelin (Mallotus villosus) were examined. Average endobenthic densities at Bryant's Cove (NFLD) in 1988 for both amphipods and capelin eggs during capelin egg development (June 17-August 8) were 0.78 amphipods cm$ sp{-2}$ and 62 eggs cm$ sp{-3}$ (750 cm$ sp{-2}$) respectively. At this average capelin egg density, laboratory results suggest that, on a daily basis, only gut capacity and clearance time li...

Boisclair, Daniel

I assessed the relationship between growth of fish in situ, food consumption, prey type and fish community descriptors in 12 perch (Perca flavescens) populations exhibiting a 1.8 to 10-fold range in growth rates. / Perch growth rates consistently decreased as fish numerical density increased (r$ sp2$ = 0.60) and increased as feeding levels increased (r$ sp2$ = 0.30). I found no significant relationship between the quantity of food consumed by perch and fish numerical density. Prey quality explai...

Shieh, Anthony

Field trials were conducted at three British Columbian Atlantic salmon farms to test the performance of a fish image capturing and sizing system (FICASS) against the presently used seine/dip netting technique. FICASS consisted of underwater video camera equipment combined with an S-VHS videorecorder and image processing equipment. Salmon farmers require a new, noninvasive, sampling method to obtain population average fish weight (kg) (AFWIKE) and standard deviation (kg) (SDWIK), because th...

Rose, Dominic, Jöris, Julian, Hackermüller, Jörg, Reiche, Kristin, Li, Qiang, Stadler, Peter F.

Teleost fishes share a duplication of their entire genomes. We report here on a computational survey of structured non-coding RNAs (ncRNAs) in teleost genomes, focusing on the fate of fish-specific duplicates. As in other metazoan groups, we find evidence of a large number (11,543) of structured RNAs, most of which (~86%) are clade-specific or evolve so fast that their tetrapod homologs cannot be detected. In surprising contrast to protein-coding genes, the fish-specific genome duplication did n...

Witzmann, Florian

Diese Habilitationsschrift konzentriert sich auf die Evolution osteologischer Korrelate, anhand derer Rückschlüsse auf die Struktur der Haut sowie die Art der Atmung und der Nahrungsaufnahme früher Tetrapoden gezogen werden können. Die äußere Skulptur der Hautknochen früher Tetrapoden trug zur Konsolidierung der darüber liegenden Dermis bei; dies und die zahlreichen Hautverknöcherungen deuten darauf hin, dass Hautatmung im Gegensatz zu heutigen Lissamphibien keinen wesentlichen Teil des Gasausta...

Filipe Fernandes Coutinho

No description available.

Rodrigo Teodoro Passos

Nas últimas décadas têm ocorrido mudanças significativas no setor do retalho resultantes da globalização, do aumento de competitividade e da transformação do comportamento de compra do consumidor. Esta mudança de paradigma também se aplica ao setor do peixe fresco, que tem sido alvo do interesse de investigadores internacionais por razões políticas e económicas. Tendo em conta este ambiente competitivo, que valoriza a qualidade e o serviço fornecido ao consumidor assente em custos aceitáveis, é ...

Protein function is acutely sensitive to temperature. Investigations of enzymes have demonstrated that the thermal adaptation of proteins is achieved through adjustments in conformational flexibility that lead to changes in protein function. Subtle changes in primary structure drive these adjustments in tertiary structure and function. Antarctic fish of the Perciformes suborder Notothenioidei survive and thrive in subzero temperatures. Key to the evolutionary success of this group is the adaptat...

Clément, Romain Jean Gilbert

Das Zusammenleben in Gruppen ist im Tierreich ein weit verbreitetes Phänomen. Einer der Vorteile des Gruppenlebens könnte die sogenannte „Schwarmintelligenz“ sein, das heißt die Fähigkeit von Gruppen kognitive Probleme zu lösen, die die Problemlösekompetenz einzelner Individuen übersteigt. In der vorliegenden Dissertation untersuchte ich, ob die Gruppengröße beim Menschen und bei Fischen mit einer verbesserten Entscheidungsfindung einhergeht. Beim Menschen analysierte ich zunächst das Abschneide...

Olney, John E.

No description available.

Although the evolutionary implications of natural differences in flow regime have been well-studied, the evolutionary implications of anthropogenic modification of flow regime are not well understood. To begin to characterize the evolutionary consequences of dam construction for small stream fishes, I conducted four related studies focused on the blacktail shiner (Cyprinella venusta). First, to characterize natural variation in body shape related to stream characteristics, I assessed the extent ...

Zajicek, Petr

Europäische große Flüsse wurden über Jahrhunderte entscheidend verändert und zu Wasserstraßen für die Schifffahrt ausgebaut. Flussregulierung, Begradigung und Hochwasserschutz tragen zu multiplen Stressoren bei, wobei die Schifffahrt bislang keine Beachtung als potentieller zusätzlicher Einflussfaktor (Stressor) fand. Die zentrale Fragestellung dieser Arbeit befasste sich mit der Rolle der Schifffahrt zwischen multiplen Stressoren und deren Auswirkungen auf die Fischgemeinschaften großer Flüsse....

Kumru, Salih

<p>Aquaculture has potential to support the food supply of increasing world population. Flavobacterial diseases pose a serious problem in wild and aquacultured fish stocks throughout the world. <i>Flavobacterium columnare</i>, <i>F. branchiophilum</i>, and <i>F. psychrophilum</i> are well-known <i>Flavobacterium</i> species that cause important fish losses. Recently, new <i>Flavobacterium</i> species, isolated from diseased fish, have been reported, but their virulence mechanisms are not clear. ...