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Dissertations / Theses on the topic 'Pacific oyster'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Davis, Jonathan P. "Studies on the influence of ambient temperature and food supply on growth rate, carbohydrate content and reproductive output in diploid and triploid Pacific oysters, Crassostrea gigas (Thunberg) /." Thesis, Connect to this title online; UW restricted, 1994. http://hdl.handle.net/1773/5347.

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2

Paltiel, Charles J. "An analysis of the 1994-1996 northern Strait of Georgia oyster survey." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/MQ51440.pdf.

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3

Takagi, Masaya. "Studies on the shell formation mechanism of pacific oyster." Kyoto University, 2007. http://hdl.handle.net/2433/136536.

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Kyoto University (京都大学)<br>0048<br>新制・課程博士<br>博士(農学)<br>甲第13117号<br>農博第1622号<br>新制||農||941(附属図書館)<br>学位論文||H19||N4243(農学部図書室)<br>UT51-2007-H390<br>京都大学大学院農学研究科応用生物科学専攻<br>(主査)助教授豊原治彦, 教授田中克, 教授永尾雅哉<br>学位規則第4条第1項該当

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4

Grason, Emily W. Miner Benjamin G. "Alien vs. predator : effects of a native predator on two invasive oyster drills and oysters in Washington State /." Online version, 2010. http://content.wwu.edu/cdm4/item_viewer.php?CISOROOT=/theses&CISOPTR=360&CISOBOX=1&REC=5.

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5

Perera, Percy. "Heavy metal concentrations in the Pacific oyster Crassostrea gigas thesis submitted in partial fulfilment of the degree of Master of Applied Science, Auckland University of Technology, September 2004." Full thesis. Abstract, 2004.

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6

Pieterse, Aldi. "Growth, condition, survival and feeding rate of the Pacific oyster (Crassostrea gigas Thunberg) cultured in three distinct South African environments." Thesis, Stellenbosch : Stellenbosch University, 2013. http://hdl.handle.net/10019.1/79833.

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7

Money, Cathryn. "Trace metal chemical speciation and acute toxicity to Pacific oyster larvae." Thesis, University of Plymouth, 2008. http://hdl.handle.net/10026.1/2252.

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Controlled laboratory studies showed that the toxicity induced by biologically relevant trace metal species of Cu, Cd, Pb and Zn on embryo-larval development occurred at concentrations in excess of those found in the natural environinent, except for Cu in metal perturbed areas. Average free ion concentrations inducing 50% abnormal development( EC50feew) ere determineda s 0.23 nM CU2+8, 8.0 rim Cd2+,1 28 nM Zn2+a nd 3 62 nM Pb 2+ . However, the response to some binary metal combinations indicated enhanced (synergy) toxicity at concentrations relevant for estuarine waters (e. g. EC5of'. for Cu2+

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8

Evans, Olivia May. "Transmission of Ostreid herpesvirus-1 in the Pacific Oyster (Crassostrea gigas)." Thesis, The University of Sydney, 2016. http://hdl.handle.net/2123/15819.

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Ostreid herpesvirus-1 microvariant (OsHV-1) is a member of the family Malacoherpesviridae within the order Herpesvirales. OsHV-1 microvariants have been responsible for mass mortality events in commercially produced Pacific oysters (Crassostrea gigas) in Australia, New Zealand and Europe, since their first detection in France and Australasia in 2008 and 2010, respectively. OsHV-1 presents a significant threat to the Australian C. gigas industry (worth AU$53 million in 2007/08), with all age and size classes of C. gigas affected by the virus. Oysters <1 year of age are the most susceptible age

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9

Lokmer, Ana [Verfasser]. "Pacific oyster holobiont in the changing environment : a microbial perspective / Ana Lokmer." Kiel : Universitätsbibliothek Kiel, 2018. http://d-nb.info/1169132618/34.

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10

Switzer, Soleil Elana. "Invertebrate fouling community composition associated with Pacific oyster (Crassostrea gigas) suspended tray culture." Thesis, University of British Columbia, 2010. http://hdl.handle.net/2429/21646.

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Fouling organisms associated with suspended oyster aquaculture can significantly increase operational costs for growers and significantly decrease product marketability. Currently, there is little information available on the fouling communities present on deep-water, suspended tray Pacific oysters (Crassostrea gigas). In general, the industry practice in tray production of Pacific oyster is to use plastic trays, but a new polyvinyl-coated metal tray, which accommodates higher oyster densities, has recently become available. The objectives of this thesis were firstly, to assess whether differe

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11

Cardona, Costa José. "EMBRYOLOGICAL AND MICROMANIPULATION TECHNIQUES IN ZEBRAFISH (Danio rerio) AND PACIFIC OYSTER (Crassostrea gigas)." Doctoral thesis, Universitat Politècnica de València, 2010. http://hdl.handle.net/10251/8326.

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En este trabajo de tesis, se presentan diversos estudios experimentales, desarrollados prin cipalmente en pez cebra pero también en ostra del Pacífico, que persiguen la puesta a punto de técnicas relevantes para la utilización de estas dos especies en el campo de la biomedicina, la toxicogenómica y la acuicultura como modelo experimental. En pez cebra, se han puesto a punto y testado: Técnicas de vitrificación de tejido de aleta caudal, de blastómeras (en microvolúmenes) y de tejido gonadal. Técnica de quimerismo de la línea germinal en estadio MBT, con una penalización previa por radi

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12

Bucklin, Katherine Adelaide. "Analysis of the genetic basis of inbreeding depression in the Pacific oyster Crassostrea gigas /." Connect to Digital dissertations. Restricted to UC campuses. Access is free to UC campus dissertations, 2002. http://uclibs.org/PID/11984.

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13

de, Kantzow Maximilian Clarence. "Epidemiological investigations inform Ostreid herpesvirus 1 disease control in Pacific oysters (Crassostrea gigas)." Thesis, University of Sydney, 2020. https://hdl.handle.net/2123/23494.

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The high mortality and economic loss in farmed Pacific oysters (Crassostrea gigas) caused by the virulent microvariant genotypes of Ostreid herpesvirus - 1 (OsHV-1) has spurred research into strategies to mitigate the impact of the disease. The two aims of this thesis are i) to examine the effect of farm management and other risk factors on mortality caused by OsHV-1 during a natural outbreak and ii) to use a laboratory infection model for OsHV-1 that provides control of the environment to examine the specific risk factors and there interactions on mortality due to OsHV-1. Water temperature ha

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14

Bagusche, Frauke. "Environmental effects on the physiology of calcification in the Pacific oyster Crassostrea gigas Thunberg, 1793." Thesis, University of Southampton, 2013. https://eprints.soton.ac.uk/355539/.

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15

Cassis, David. "The role of phytoplankton and environmental variables in Pacific oyster (Crassostrea gigas) aquaculture in British Columbia." Thesis, University of British Columbia, 2011. http://hdl.handle.net/2429/39859.

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Pacific oyster aquaculture in British Columbia faces serious challenges, such as high cadmium (Cd) concentrations, low growth and high mortalities during summer, and inability to directly gauge stress levels. The goal of this dissertation was to address these challenges by investigating the role of biological, physical and chemical oceanographic parameters in controlling them in various oyster farms in the Strait of Georgia. Three studies were undertaken. The first, from August 2004 to July 2005, investigated the role of phytoplankton in controlling Cd levels in the oysters in a Deep Bay farm.

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16

Mizuta, Darien Danielle. "Water quality improvement and the promotion of cultured oyster production by artificial upwelling." Kyoto University, 2014. http://hdl.handle.net/2433/188768.

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Kyoto University (京都大学)<br>0048<br>新制・課程博士<br>博士(農学)<br>甲第18330号<br>農博第2055号<br>新制||農||1022(附属図書館)<br>学位論文||H26||N4837(農学部図書室)<br>31188<br>京都大学大学院農学研究科応用生物科学専攻<br>(主査)教授荒井修亮, 教授山下洋, 准教授笠井亮秀<br>学位規則第4条第1項該当

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17

Jones, Trevor O. "Uptake and depuration of the antibiotics, oxytetracycline and Romet-30 in the Pacific oyster, Crassostrea gigas (Thunberg)." Thesis, University of British Columbia, 1990. http://hdl.handle.net/2429/28991.

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Use of antibiotics in the aquaculture industry for the control of bacterial infections in salmon has led to public concern regarding antibiotic residues in salmon tissue and the potential health risk this poses to humans. Oxytetracycline and Romet-30 are two common antibacterial agents utilized to control disease in the local finfish aquaculture industry of British Columbia, Canada. Many fish farms in British Columbia are located within close proximity to existing shellfish stocks. The potential for antibiotic bioconcentration and the production of bacterial resistance to the drugs in bivalves

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18

Vogeler, Susanne. "Nuclear receptors in the Pacific oyster, Crassostrea gigas, as screening tool for determining response to environmental contaminants." Thesis, University of Exeter, 2016. http://hdl.handle.net/10871/23626.

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Marine environments are under constant pressure from anthropogenic pollution. Chemical pollutants are introduced into the aquatic environment through waste disposal, sewage, land runoff and environmental exploitation (harbours, fisheries, tourism) leading to disastrous effects on the marine wildlife. Developmental malformations, reproduction failure including sex changes and high death rates are commonly observed in aquatic animal populations around the world. Unfortunately, the underlying molecular mechanisms of these pollution effects, in particular for marine invertebrate species, are often

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19

Nice, Helen Elizabeth. "The effect of endocrine disruptors on the growth and development of the Pacific oyster, Crassostrea gigas (Thunberg)." Thesis, Royal Holloway, University of London, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.271354.

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20

Pathirana, Bhagini Erandi. "Environmental influences on the Pacific oyster (Crassostrea gigas) microbiome and disease associated with Ostreid herpesvirus-1 (OsHV-1)." Thesis, University of Sydney, 2020. https://hdl.handle.net/2123/23241.

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Pacific oyster mortality syndrome (POMS) is a high mortality disease which has negatively impacted oyster farming. Despite the causal relationship between OsHV-1 and oyster mortality, the incidence and severity of disease is determined by complex interactions between the physiology of oysters, the environmental conditions and secondary pathogens. Understanding the multifactorial nature of the disease is required to develop management strategies. Recently, changes in the microbiome of oysters were associated with POMS. It is important to identify if differences in the microbiome are an outcome

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21

Salinas-Flores, Liliana, and n/a. "Understanding and improving the cryopreservation of pacific oyster (Crassostrea gigas) oocytes via the use of two approaches : modification of an existing cryopreservation protocol and manipulation of the lipis fraction of the oocytes." University of Otago. Department of Food Science, 2008. http://adt.otago.ac.nz./public/adt-NZDU20080305.143446.

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Cryopreservation of gametes is a valuable tool for the fast-growing aquaculture industry in New Zealand. In the present study, research was aimed to improve the cryopreservation of Pacific oyster (Crassostrea gigas) oocytes. For this, two main approaches were used: the modification of an existing published (standard) cryopreservation protocol for oyster oocytes and the modification of the oocytes themselves prior to cryopreservation. The objectives in the chapters of this thesis were: (a) determination of the cryobiological characteristics of oyster oocytes; (b) assessment and reduction of int

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22

Picard, Manon. "Effects of ocean acidification on early developmental stages of the Pacific oyster (Crassostrea gigas) in an aquaculture setting." Thesis, University of British Columbia, 2014. http://hdl.handle.net/2429/48410.

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Ocean acidification is a great concern worldwide. It has important impacts on the shellfish industry. However, more information is needed to assess the impacts of ocean acidification (OA) on economically important shellfish in a realistic industry setting. The goal of this thesis was to determine the effects of OA on the early developmental stages of the Pacific oyster, Crassostrea gigas. To better represent industrial-scale oyster production than is possible in small-volume, short-term laboratory studies, experiments were conducted at the Island Scallops hatchery facility using large volume c

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23

Pogson, Grant H. "Biochemical studies on the expression of overdominance at the phosphoglucomutase-2 locus in the Pacific oyster, Crassostrea gigas (Thunberg)." Thesis, University of British Columbia, 1988. http://hdl.handle.net/2429/29262.

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Numerous studies have documented significant associations between multiple-locus heterozygosity and fitness-related traits in natural populations, but the explanations for these patterns remain unknown. The objective of the present study was to examine the merits of the overdominance hypothesis as the mechanism responsible for a positive correlation between adult body weight and heterozygosity involving the phosphoglucomutase-2 (Pgm-2) locus in the Pacific oyster, Crassostrea gigas. The kinetic and structural properties of seven Pgm-2 genotypes were examined over physiological ranges of tempe

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24

Evans, B. S. "The ecology and reproductive biology of the Pacific oyster (Crassostrea gigas (Thunberg 1795)) in the Daucleddau Estuary, West Wales." Thesis, Swansea University, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.636917.

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This thesis is concerned with the ecology and mariculture of the Pacific oyster <i>Crassostrea gigas</i> (Thunberg, 1795) in U.K. waters. Oyster culture in the U.K. is reviewed, with detailed assessment of operations in the Daucleddau Estuary, South-West Wales. Growth performance and gametogenesis of <i>C. gigas</i> were monitored over two seasons (1986 and 1987) at two oyster farms in the Daucleddau Estuary (Carew Oysters and Cosheston Fish Farms Ltd.), and at a control site in the Menai Strait (Tal-y-foel). Environmental water quality was regularly monitored over the same period. Environment

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25

Hart, Courtney. "THE EFFECTS OF 4-NONYLPHENOL ON THE IMMUNE RESPONSE OF THE PACIFIC OYSTER, CRASSOSTREA GIGAS, FOLLOWING BACTERIAL INFECTION (VIBRIO CAMPBELLII)." DigitalCommons@CalPoly, 2016. https://digitalcommons.calpoly.edu/theses/1609.

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Endocrine disrupting chemicals (EDCs) are compounds that can interfere with hormone signaling pathways and are now recognized as pervasive in estuarine and marine waters. One prevalent EDC in California’s coastal waters is the xenoestrogen 4-nonylphenol (4-NP), which has been shown to impair reproduction, development, growth, and in some cases immune function of marine invertebrates. To further investigate effects of 4-NP on marine invertebrate immune function we measured total hemocyte counts (THC), relative transcript abundance of immune-relevant genes, and lysozyme activity in Pacific oyste

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26

Manders, James G. "A current analysis of the status and prospects for the culturing of the Pacific oyster, Crassostrea gigas (Thunberg, 1793) in British Columbia, Canada." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/mq24200.pdf.

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27

Downing, Sandra Leigh. "Triploid and diploid interspecific and conspecific crosses between the Pacific oyster, Crassostrea gigas (Thunberg), and either Crassostrea virginica (Gmelin) or Crassostrea rivularis (Gould) /." Thesis, Connect to this title online; UW restricted, 1993. http://hdl.handle.net/1773/5283.

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28

Burioli, Erika Astrid Virginie <1977&gt. "An Integrated Approach to Improve the Knowledge of Ostreid Herpesvirus Type 1 and the Comprehension of Mortality Events in the Pacific Oyster Crassostrea Gigas." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2017. http://amsdottorato.unibo.it/8142/1/Tesi%20dott%20Burioli.pdf.

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In a period of expansion of oysters farming in Italy, the present work aimed to contribute to this challenge approaching several important aspects connected with oyster health management. Firstly, we evidenced the presence of natural populations of C. gigas along the Italian coasts and showed differences in the distribution and density population between Adriatic and Tyrrhenian Sea. The presence of OsHV-1 infecting these wild populations was detected in all the Adriatic beds, demonstrating high diversity of genotypes, and showing that these individuals may play a role as reservoir of infection

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29

Mai, Huong. "Evaluation of the deleterious effects of heavy metals and pesticides on early life stages and gametes of the Pacific Oyster, Crassostrea gigas : application to the pollution context of the Arcachon Bay." Phd thesis, Université Sciences et Technologies - Bordeaux I, 2013. http://tel.archives-ouvertes.fr/tel-01053814.

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The coastal areas are subject to multiple anthropogenic pressures including chemical pollution that can pose a real risk to the sustainability of aquatic species. The Arcachon Bay, macrotidal lagoon located on the French Atlantic coast, is the important ecosystem for oyster farming. But for several years, the oyster farms face lower recruitment and high mortality of oyster spat. Chemical contamination of the environment as a factor that may contribute to the observed effects on oysters has so far not been investigated.The present thesis aimed at evaluating through different approaches, of the

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30

Picot, Sandy. "Caractérisation de la voie de l’autophagie chez l’huître creuse Crassostrea gigas en réponse à une infection par le virus OsHV-1." Thesis, La Rochelle, 2019. http://www.theses.fr/2019LAROS006.

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Les importantes mortalités observées sur le naissain de l’huître creuse, Crassostrea gigas, ont fortement affecté l’économie aquacole de plusieurs pays dans le monde. Les causes de ces mortalités sont complexes, mais un agent viral appartenant à la famille des herpèsvirus, appelé ostreid herpesvirus 1 (OsHV-1), a été identifié comme étant le principal facteur responsable de ces mortalités. Les moyens disponibles pour lutter contre le virus OsHV-1 restent limités et une meilleure connaissance des interactions entre l’huître creuse et le virus est nécessaire. Récemment, les résultats de plusieur

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Moreau, Pierrick. "Étude des interactions entre infection à ostreid herpesvirus 1, immunité, autophagie et pesticides chez l’huître creuse, Crassostrea gigas." Thesis, La Rochelle, 2014. http://www.theses.fr/2014LAROS028/document.

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Le travail de thèse s’inscrit dans la problématique très actuelle des mortalités massives de naissain et de juvéniles d’huîtres creuses, C. gigas, et des questionnements autour de l’implication des pesticides dans ce phénomène. La première partie de la thèse a été consacrée à l’étude des effets de pesticides sur les capacités hémocytaires de l’huître creuse (in vitro et in vivo). L’effet immuno-modulateur des xénobiotiques sélectionnés (seul ou en mélange) a été exploré principalement au travers de la cytométrie en flux. La deuxième partie de la thèse a concerné l’étude des effets d’un mélange

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Segarra, Amélie. "Étude des interactions hôte/virus chez l’huître creuse, Crassostrea gigas, et son virus Ostreid herpesvirus 1." Thesis, Lorient, 2014. http://www.theses.fr/2014LORIS344/document.

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Le virus ostreid herpesvirus type 1 (OsHV-1), peut être considéré comme un des agents infectieux majeur affectant les élevages d’huîtres creuses, Crassostrea gigas, en France. Des différences de sensibilité à l’infection ont également été observées au sein de cette espèce. Des travaux précédents suggèrent un lien entre la base génétique et la survie des animaux face à l’infection. Dans ce contexte, l’objectif principal du travail de thèse était de mieux comprendre les interactions entre l’huître creuse et OsHV-1, et plus particulièrement, les bases moléculaires du cycle viral. Nos résultats mo

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Lafont, Maxime. "Mécanismes et spécificité du priming immunitaire antiviral chez un Lophotrochozoaire, l'huitre creuse Crassostrea gigas." Thesis, Perpignan, 2017. http://www.theses.fr/2017PERP0041/document.

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Depuis 2008, des épisodes de surmortalité massive d’origine multifactorielle, affectent mondialement les élevages de juvéniles d’huître creuse Crassostrea gigas dont le virus de type herpès, l’OsHV-1, peut être considéré comme un des agents pathogènes majeurs. L’immunité des huîtres, repose sur un système immunitaire inné et a longtemps été considéré comme peu spécifique et dépourvu de mémoire. Cependant, cette vision a été remise en question via des études ayant démontré l’existence d’une réponse immunitaire spécifique et mémoire chez des invertébrés. Dans le cadre de cette thèse, l’objectif

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Tallec, Kevin. "Impacts des nanoplastiques et microplastiques sur les premiers stades de vie (gamètes, embryons, larves) de l'huître creuse Crassostrea gigas Surface functionalization determines behavior of nanoplastic solutions in model aquatic environments, in Chemosphere 225, June 2019 Nanoplastics impaired oyster free living stages, gametes and embryos, in Environmental Pollution 242 (Part B), November 2018 Constraints and priorities for conducting experimental exposures of marine organisms to microplastics, in Frontiers in Marine Science 5(252), July 2018 Cellular responses of Pacific oyster (Crassostrea gigas) gametes exposed in vitro to polystyrene nanoparticles, in Chemosphere 208, October 2018." Thesis, Brest, 2019. http://www.theses.fr/2019BRES0103.

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Depuis 70 ans, les débris plastiques dont la fin de vie a été négligée par les sociétés humaines s’accumulent dans les océans. L’évaluation des effets engendrés par cette contamination ubiquitaire est une préoccupation majeure, notamment au regard des micro- et potentiels nanoplastiques (MNP ; < 5 mm) du fait de leur biodisponibilité pour la plupart des organismes marins. L’objectif de cette thèse était de déterminer les effets des MNP sur les jeunes stades de vie d’une espèce ingénieure des habitats côtiers, l’huître creuse Crassostrea gigas. Les impacts des MNP sur ces jeunes stades sont

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Tucker, Gene Rhea. "Oysters, macaroni, and beer: the Texas Pacific and Manufacturing Company of Thurber, Texas /." Stephenville, Tex. : Tarleton State University, 2006. http://www.geocities.com/geneheatucker/library-thesis-thurberbibliography.html.

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Rozmankova, Eliška. "Currently used pesticides and their mixtures : what are the risks to non-target aquatic organisms? Laboratory and in situ approaches." Thesis, Bordeaux, 2020. http://www.theses.fr/2020BORD0301.

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Les pesticides ont pour rôle de protéger les cultures des espèces nuisibles permettant ainsi d’intensifier le rendement agricole pour nourrir une population toujours en augmentation. Néanmoins, les pesticides se retrouvent souvent dans le réseau aquatique, par exemple via le ruissellement, où ils peuvent nuire aux organismes non-cibles. Les concentrations environnementales des pesticides sont souvent considérées sans risque pour les écosystèmes aquatiques, mais elles peuvent cependant induire des effets sublétaux dans les organismes exposés. De plus, les organismes ne font généralement pas fac

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Flahauw, Emilie. "Caractérisation génétique de l'effort reproducteur de l'huitre creuse, Crassostrea gigas, dans le cadre des mortalités estivales de juvéniles : approche QTL." Thesis, La Rochelle, 2013. http://www.theses.fr/2013LAROS406/document.

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L’huître creuse, Crassostrea gigas, est une espèce dont la production aquacole représente un intérêt économique tant au niveau mondial qu’aux niveaux européen et français. Cependant, cette espèce subit des mortalités estivales enregistrées dès le début du 20ème siècle et, depuis 2008, ce phénomène s’est amplifié et menace essentiellement les huîtres juvéniles. La production aquacole d’huître creuse subit les conséquences de ces mortalités massives ; c’est pourquoi ce phénomène est étudié depuis de nombreuses années. En France, la bactérie Vibrio splendidus et le virus Ostreid Herpes Virus 1 (O

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Diederich, Susanne. "Invasion of Pacific oysters (Crassostrea gigas) in the Wadden Sea competitive advantage over native mussels = Eingeführte Pazifische Austern (Crassostrea gigas) im Wattenmeer : Konkurrenzvorteil gegenüber heimischen Miesmuscheln /." [S.l.] : [s.n.], 2005. http://e-diss.uni-kiel.de/diss_1690/d1690.pdf.

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Delisle, Lizenn. "Rôle de la température dans l'interaction huître creuse / Ostreid Herpesvirus de type 1 : réponses transcriptomiques et métaboliques." Thesis, Brest, 2018. http://www.theses.fr/2018BRES0090/document.

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Crassostrea gigas est la principale espèce d’huître cultivée dans le monde. Depuis 2008, de sévères épisodes de mortalités affectent les huîtres âgées de moins d’un an en Europe et en Océanie et sont associées à l’émergence de l’Ostreid herpèsvirus μVar (OsHV-1 μVar). En Europe, ces mortalités sont saisonnières et surviennent lorsque la température de l’eau de mer est comprise entre 16°C et 24°C. Dans le cadre de ce travail, l’effet des hautes températures (21°C, 26°C et 29°C) est évalué sur la sensibilité des huîtres à OsHV-1 mais aussi sur la persistance et la virulence du virus. La survie d

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40

Kent, GN. "Gynogen induction and diploid restoration in the Pacific oyster Crassostrea gigas." Thesis, 2010. https://eprints.utas.edu.au/20761/1/whole_KentGregNeil2010_thesis.pdf.

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A large proportion of stock improvement in agriculture and more recently aquaculture has come through breeding strategies that work to isolate and fix favourable characters and eliminate undesirable genetic qualities in the target species. The development of homozygous breeding lines, which allow fixing of desirable traits need to be progressed to enhance the effectiveness of breeding strategies. Such lines would also be a valuable research tool for examining genetic versus environmental influence on reproductive biology and stock performance. One potentially rapid and effective method that ma

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Robinson, Anja M. "The effects of dietary algal and lipid supplements on the gonadal and larval development of Crassostrea gigas kumamoto (Thunberg) /." 1991. http://hdl.handle.net/1957/7296.

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Aagesen, Alisha M. "Investigating Vibrio parahaemolyticus interactions with the Pacific oyster, Crassostrea gigas." Thesis, 2012. http://hdl.handle.net/1957/35769.

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Vibrio parahaemolyticus is a Gram-negative, halophilic, human pathogenic bacterium ubiquitous in the marine environment. Like many Vibrio species, V. parahaemolyticus commonly associates with shellfish, particularly oysters. Ingestion of a raw or under cooked oysters contaminated with V. parahaemolyticus can cause gastroenteritis, which is typically self-limiting and rarely causes death. Globally, oyster production is highly lucrative, especially on the West Coast of the United States where approximately 60% of oyster production occurs each year. Outbreaks of V. parahaemolyticus can result

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Stick, David A. "Identification of optimal broodstock for Pacific Northwest oysters." Thesis, 2011. http://hdl.handle.net/1957/26654.

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The United States Pacific Northwest is well known for its shellfish farming. Historically, commercial harvests were dominated by the native Olympia oyster, Ostrea lurida, but over-exploitation, habitat degradation, and competition and predation by non-native species has drastically depleted their densities and extirpated many local populations. As a result, shellfish aquaculture production has shifted to the introduced Pacific oyster, Crassostrea gigas. An underlying objective of this dissertation is the use of molecular genetics to improve our ability to accurately identifying optimal oyster

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Bell, Andrew Harwood. "The retention of picoplankton by the pacific oyster, Crassostrea gigas, and implications for oyster culture." 2006. http://hdl.handle.net/2292/504.

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Pacific oyster (Crassostrea gigas) farming in New Zealand has reached a point where the pressures on resources appear likely to constrain current, and future, development. To maintain industry growth, security of juvenile oyster (spat) supply and productivity gains within the existing farm leases, are becoming industry imperatives. The use of hatchery technology could achieve both of these requirements, but it is expensive to establish and maintain. The additional expense of a hatchery could be offset by the establishment of, for example, a selective breeding program to enhance oyster producti

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Evans, Sanford 1968. "Improving Pacific oyster (Crassostrea gigas) production through selective breeding." Thesis, 2004. http://hdl.handle.net/1957/29975.

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Ma, Lei. "Commercial application of high pressure processing for inactivating Vibrio parahaemolyticus in Pacific oysters (Crassostrea gigas)." Thesis, 2012. http://hdl.handle.net/1957/28654.

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Vibrio parahaemolyticus is a Gram-negative, halophilic pathogen that occurs naturally in coastal and estuarine environments. This human pathogen is frequently isolated from a variety of seafood, particular oysters, and is the leading cause of gastroenteritis associated with seafood consumption. Several outbreaks of V. parahaemolyticus infections linked to consumption of raw oysters have been documented. Contamination of oysters with V. parahaemolyticus is a concern for public health. This study investigated the efficacy of high pressure processing (HPP) in inactivating V. parahaemolyticus in

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Cowan, Malcolm. "Exploring the mechanisms of Pacific oyster summer mortality in Baynes Sound aquaculture." Thesis, 2020. http://hdl.handle.net/1828/12114.

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In recent years, mortalities of unknown aetiology have occurred in Pacific oyster aquaculture in Baynes Sound, BC during the summer. Field studies were conducted to examine environmental, reproductive and microbial factors that could be contributing to these mortalities. In 2017, oysters were observed at three sites from July 5 to September 15. Each intertidal site had three modules containing seven stacked trays with 80 oysters per tray. Final mortalities ranged from 9.3 ± 1.9 to 38.8 ± 4.9% per module. The mortality per module correlated significantly with gonad length and the proportion of

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Holliday, J. E. "Nursery culture of Sydney rock oysters, Saccostrea commercialis (Iredale & Roughley, 1933) and Pacific oysters, Crassostrea gigas (Thunberg 1793)." Thesis, 1995. https://eprints.utas.edu.au/20333/1/whole_HollidayJE1995_thesis.pdf.

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This study of settlement, nursery and growing techniques for Sydney rock oysters, Saccostrea commercialis, and Pacific oysters, Crassostrea gigas, was aimed at developing and evaluating production systems for juvenile oysters (spat). Settlement, retention (spat retained within nursery units from settlement or stocking to harvest), survival and growth of juvenile wild and hatchery produced oysters were assessed in relation to systems design and management at sites in New South Wales (NSVV), Australia.

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Krassoi, Frederick Rudolf. "Population ecology of the Sydney rock oyster saccostrea commercialis and the pacific oyster crassostrea gigas in a New South Wales estuary." 2001. http://hdl.handle.net/2100/1107.

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University of Technology, Sydney, 2001.<br>The study of place was often divided between the spatial interests of geographers and local historians intent on constructing heroic lineages. In the period of accelerated globalization however, discrete discourses on time and space are no longer tenable. Histories of place engage the transdisciplinary approach of recent scholarship in understanding the complexities and fluidity of the world in which we live. Places are constructed out of the enmeshing of the material, social and cultural. The reasons why people migrate both within and to particular p

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Mitchell, Iona Margaret. "Relationship between water quality parameters (nutrients, seston, chlorophyll a), hydrodynamics and oyster growth in three major Pacific oyster (Crassostrea gigas) growing areas in southern Tasmania (Australia)." Thesis, 2001. https://eprints.utas.edu.au/20928/1/whole_MitchellIonaMargaret2001_thesis.pdf.

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An assessment was made of three Pacific oyster ( Crassostrea gig as) growing areas in southern Tasmania (Pitt Water, Pipeclay Lagoon and Little Swanport) with respect to water quality parameters, oyster growth and hydrodynamic characteristics. This was done in an order to explain differences in reported oyster growth rates and hence address the issue of shellfish productivity in each area. Water samples were collected monthly for 13 months from several sites along the length of each area from a marine site to the. upper reaches of the estuary, or coastal embayment. These were analysed fo

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