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Dissertations / Theses on the topic 'Salmonids'

Author: Grafiati
Published: 4 June 2021
Last updated: 25 July 2025

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1

Fast, Mark D. "Comparative susceptibilities of salmonids to Lepeophtheirus salmonis infections, biochemical and physiological studies." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/MQ63257.pdf.

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2

Dawson, Leigh Helen Jane. "Physiological, behavioural and pathological effects of sea lice, Lepeophtheirus salmonis (Krøyer, 1837), on Salmonids." Thesis, University of Aberdeen, 1997. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU483280.

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This thesis examined the physiological, behavioural and pathological effects of sea lice, <I>Lepeophtheirus salmonis </I>(Krøyer, 1837), on wild sea trout, <I>Salmo trutta </I>L., and experimentally infected sea trout and Atlantic salmon, <I>Salmo salar </I>L. to determine how, and to what extent, sea lice cause mortality of their infected hosts. A feeding hierarchy was established in groups of sea lice infected and uninfected Atlantic salmon as a physiological stressor. Results indicated that chalimus did not stimulate physiological changes leading to marine mortality and the intensity of the
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3

Turenne, Eric D. "Lipid Mobilization In Exercising Salmonids." Thesis, Université d'Ottawa / University of Ottawa, 2018. http://hdl.handle.net/10393/37075.

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Animals rely on lipids as a major fuel for endurance exercise because they pack more joules per gram than any other fuel. However, in contrast to mammals, information on how the mobilization of lipids from endogenous stores is managed to meet the needs of energy metabolism in swimming fish is sparse. Information on in vivo rates of lipid mobilization in swimming fish has been limited to relatively low exercise intensities and has only been investigated in a single species. Therefore, the goal of my thesis was to address this paucity of information by quantifying lipolytic rate in rainbow trout
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4

Crooks, Lucy Elizabeth. "Organic contaminants in salmonid spawning grounds : occurrences and effects on the early life stages of salmonids." Thesis, University of Portsmouth, 2011. https://researchportal.port.ac.uk/portal/en/theses/organic-contaminants-in-salmonid-spawning-grounds(1b72081d-8873-4f43-a6a6-7388458ec67a).html.

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The factors regulating salmonid populations remain poorly understood, although contamination of the freshwater environment has been implicated as a causative factor. Depletion of stocks has become an increasing concern and it is believed that the early life stages are potentially the most vulnerable. Reduction in salmonid stocks has been reportedly linked to water quality and this current study has shown that freshwater pollution can affect the survival and development of salmonids. Environmental concentrations measured in this study varied greatly and high levels of sediment-bound contaminant
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5

Lahti, Katriina. "Integrated analysis of aggression in salmonids." Helsinki : University of Helsinki, 2001. http://ethesis.helsinki.fi/julkaisut/mat/ekolo/vk/lahti/.

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6

Benfey, Tillmann J. "The reproductive physiology of triploid Pacific salmonids." Thesis, University of British Columbia, 1988. http://hdl.handle.net/2429/28621.

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Triploidy was induced in rainbow trout, Salmo gairdneri Richardson, by heat shock (10 min at 26, 28 or 30°C, applied 1 min after fertilization at 10°C) and in pink salmon, Oncorhynchus gorbuscha Walbaum, and coho salmon, 0. kisutch Walb., by hydrostatic pressure shock (1, 2, 3 or 4 min at 69,000 kPa, applied 15 min after fertilization at 10.5°C). Triploid individuals were identified by the flow cytometric measurement of DNA content of erythrocytes stained with propidium iodide. Gonadosomatic index was reduced to a much greater extent in triploid females than males. Triploid ovaries remained v
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7

Höjesjö, Johan. "Behavioural tactics and domestication effects in salmonids /." Göteborg : Département de zoologie, Université de Göteborg, 2002. http://catalogue.bnf.fr/ark:/12148/cb399304702.

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8

Marsden, Matthew J. "In vitro correlates of disease resistance in salmonids." Thesis, University of Aberdeen, 1993. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU603177.

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A variety of nonspecific humoral and cellular immune-parameters were investigated in several families of farmed Atlantic salmon, Salmo salar, known to exhibit differential susceptibilities to Aeromonas salmonicida (furunculosis) in the field (fishfarm) situation. Nonspecific phagocyte functions, respiratory burst activity and leucocyte migration, were not found to be selected for in resistant families. However, nonspecific humoral factors, complement, a2-macroglobulin (aa2m) and non-a2m-antiprotease activity were found to be selected for, with resistant families possessing higher activities du
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9

Bailey, Jason. "Energy requirements and feeding behaviour of salmonids in culture /." Umeå : Dept. of Aquaculture, Swedish Univ. of Agricultural Sciences, 2003. http://epsilon.slu.se/s264.pdf.

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10

Rennie, Shona. "Reproductive investment, gamete quality and diet in farmed salmonids." Thesis, University of Glasgow, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.418907.

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11

Byrne, Hazel. "The welfare and quality of farmed salmonids at harvest." Thesis, Robert Gordon University, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.248695.

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12

Duncan, Sarah Katharine. "Egg quality and the over-ripening process in salmonids." Thesis, University of Liverpool, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.359032.

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13

Belmonte, da Silva Rodrigo Caetano. "Saprolegniosis : studies of the host-pathogen interaction in salmonids." Thesis, University of Aberdeen, 2014. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=220447.

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Saprolegnia is a fresh water fish parasite responsible for significant economic losses in the aquaculture industry worldwide. The disease caused by this organism is termed saprolegniosis, being characterized by a mycosis-like infection of gills and fish skin. Without sustainable treatments available for controlling or preventing saprolegniosis, it has become a significant problem especially for salmon farming, frequently affecting the fish after vaccination. Little is known regarding how the fish immune system responds to infection and such information is vital for developing future treatments
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14

Brackley, Robert. "Interactions between migrating salmonids and low-head hydropower schemes." Thesis, University of Glasgow, 2016. http://theses.gla.ac.uk/7871/.

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The redevelopment of existing riverine barriers with modern hydropower turbines is becoming increasingly prevalent on main stem rivers with valuable stocks of migratory salmonids. This is a concern because these fish rely on longitudinal connectivity to complete their lifecycles, and modifications for hydropower could jeopardize that connectivity by obstructing or injuring migrating fish. In order to exploit very low head hydropower potential, novel turbine types are emerging. The Archimedean screw hydropower turbine is one such technology which is becoming increasingly popular for low-head ap
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15

Martin, Niall M. B. "Protein turnover in Salmonids : sexual maturation and hormonal control." Thesis, University of Aberdeen, 1990. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU548688.

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Aspects of tissue protein metabolism were studied in different groups of Atlantic salmon (Salmo salar). Firstly, 2 groups of sea water salmon were fasted for 3 and 5 days, prior to the measurement of tissue fractional rates of protein synthesis (ks, %day), using the method of 3H-phenylalanine flooding. The sensitivity of liver and gill to a short-term fast was indicated by their reduced rates of ks, while in other tissues such as ventricle, stomach and red muscle protein synthesis was unaffected. Both liver and gill are tissues which show the greatest capacities to synthesise protein, expresse
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16

Forsberg, Lars. "Genetic Aspects of Sexual Selection and Mate Choice in Salmonids." Doctoral thesis, Uppsala universitet, Populationsbiologi, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-8837.

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The long-term genetic consequences of supportive breeding programs are not well understood. Nevertheless, stocking populations with hatchery-produced fish to compensate for losses of natural production are common practice, for example after constructions of hydroelectric power dams. Hatcheries typically fertilize eggs using ‘mixed-milt fertilizations’, without consideration to natural reproductive behaviours, and hence, natural selective regimes would be altered. Here, a series of experiments with focus on Mhc and mate choice in a population of brown trout (Salmo trutta L.) with a history of l
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17

Clease, Derek Fraser. "Evolutionary divergence in Philonema (Nematoda; Philometridae) parasites of B.C. salmonids." Thesis, University of British Columbia, 1990. http://hdl.handle.net/2429/28942.

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Philonema (Nematoda; Philometridae) from anadromous hosts, sockeye salmon (Oncorhynchus nerka), and non-anadromous hosts, rainbow trout (Oncorhynchus mykiss) , were studied in order to determine if hosts with different life histories were infected with the same or different species of Philonema. Worms from the two host species were morphologically indistinguishable. However, electrophoretic banding patterns produced by restriction enzyme digestion of DNA extracted from Philonema demonstrated the presence of two genetic types corresponding to the two host species. This supports the idea that at
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18

O'Keefe, Robyn. "The feeding response and growth of diploid and triploid salmonids." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape7/PQDD_0004/MQ46460.pdf.

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19

Jones, Wayne. "Modelling the growth and resource allocation dynamics of juvenile salmonids." Thesis, University of Strathclyde, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.248333.

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20

Parkyn, Daryl Charles. "Visual biology of salmonids with special reference to polarised light sensitivity." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp02/NQ34280.pdf.

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21

Ojala, Jeffrey Veikko. "Invertebrate phenology and prey selection of three sympatric species of Salmonids." Connect to this title online, 2008. http://scholarworks.umass.edu/theses/97/.

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22

Østergaard, Anders Erlang. "Discovery and expression of novel immunoglobulin-like transcripts (NILTs) in salmonids." Thesis, University of Aberdeen, 2010. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=158294.

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Three new NILT genes were successfully cloned and characterized from rainbow trout, with one NILT alternatively spliced into a long isoform containing two Ig domains and a short isoform containing one Ig domain.  The expression of NILTs was studied in six different tissues and two different cell lines, with expression apparent in immunologically important tissues.  Furthermore, phylogenetic analysis showed that NILTs are more closely related to triggering receptor expressed on myeloid (TREM) cells and Nkp44 from humans than to NITRs from rainbow trout. The genomic organisation and structure of
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23

Suter, Hayley Claire. "The effects of maternal steroids on individual variation in juvenile salmonids." Thesis, University of Glasgow, 2002. http://theses.gla.ac.uk/5347/.

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The research described in this thesis examined whether concentrations of maternal steroids in the egg at fertilisation can influence ecologically important physiological and behavioural traits in juvenile salmonids. I have addressed four questions: Can experimental manipulation of egg steroid concentrations influence offspring physiology and behaviour? What is the extent of natural variation in the steroid content of a female's eggs at fertilisation? Does natural variation in egg steroid content influence offspring phenotype? Does maternal social status influence maternal and egg steroid conce
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24

Gauld, Niall Roderick. "The behavioural ecology of migratory salmonids in the River Tweed, UK." Thesis, Durham University, 2014. http://etheses.dur.ac.uk/10722/.

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This study investigated various life history stages of salmonids within the River Tweed, UK with a focus on migratory movements. The River Tweed is a large upland river situated on the border between Scotland and England and is home to some of the healthiest stocks of Atlantic salmon (Salmo salar) and sea trout (Salmo trutta) in the UK. The research undertaken as part of this thesis aims to assess how management can be improved to aid the migration of salmonids moving within freshwater. This is of particular importance due to increased demand for renewable energy including small scale hydropow
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25

Addley, R. Craig. "A Mechanistic Approach to Modeling Habitat Needs of Drift-Feeding Salmonids." DigitalCommons@USU, 1993. https://digitalcommons.usu.edu/etd/5808.

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A mechanistic model is developed to determine the habitat needs of drift-feeding stream salmonids from the direct cause-and- effect relationships of environmental and physiological variables on net energy intake (NEI). The model determines NEI by subtracting energy costs (basal metabolism , swimming cost, digestion cost) and losses (egestion and excretion) from the gross energy intake obtained as a result of simulated prey capture. The prey capture portion of the model utilizes components o f the predation model of C.S. Holling and the prey capture model of N.F. Hughes and L.M. Dill to determi
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26

Delfosse, Cyril. "Méthodes d'évaluation et de contrôle du stress chez les salmonides d'élevage : Implications sanitaires, zootechniques et environnementales." Thesis, Toulouse, INPT, 2017. http://www.theses.fr/2017INPT0003/document.

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De l’éclosion à l’abattage, le saumon Atlantique et la truite arc-en-ciel d’élevage sont soumis à divers événements inducteurs de stress. Le stress influe directement sur la physiologie, le comportement et les performances zootechniques des animaux. Ainsi, l’intérêt grandissant du public pour le bien-être des animaux nous a amené à améliorer les connaissances sur le stress des salmonidés d’élevage pour en proposer des méthodes d’évaluation et de contrôle. Partant de ce constat, nous avons étudié les conséquences de deux situations inductrices de stress et proposé une méthode d’évaluation du bi
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27

Von, Schalburg Kristian Robert. "The gonadotropin-releasing hormone gene : characterization, regulation and expression in two salmonids." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/NQ36651.pdf.

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28

Washburn, E. J. "Factors influencing salmonids use of an estuarine 'pool and weir' fish pass." Thesis, Swansea University, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.639353.

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The construction of a partial exclusion amenity barrage across the lower estuary of the River Tawe, South Wales, was completed in 1992. The structure includes a pool and weir fish pass consisting of 16 pools interlinked by deep notches in alternately downstream and cross facing traverses. Modifications to the fish pass weirs were carried out at the end of June 2000 in order to address the problem of excessive turbulence within the pools. The primary aim of this thesis was to examine the effectiveness of the modified fish pas under a range of environmental conditions. Underwater video was selec
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29

Watz, Johan. "Winter behaviour of stream salmonids: effects of temperature, light, and ice cover." Licentiate thesis, Karlstads universitet, Institutionen för miljö- och livsvetenskaper, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-26809.

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In boreal streams, stream salmonids typically face low water temperatures and variable ice conditions during winter, and thus stream salmonids are expected to use different behavioural strategies to cope with these environmental conditions. The studies presented in this thesis explore how temperature, light intensity, and surface ice affect salmonid behaviour, with focus on drift-feeding and ventilation rates. The first paper reports results from a laboratory study designed to measure prey capture probabilities and reaction distances of drift-feeding Atlantic salmon, brown trout, and European
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30

Petrie, Allan Gilmour. "Potential of PLG and LTB for oral delivery of antigens to salmonids." Thesis, University of Aberdeen, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.401271.

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Biocompatible polymer poly(lactide-co-glycolide) (PLG) and <i>Escherichia coli</i> heat labile enterotoxin B-subunit (LTB) were investigated with regards to their potential for delivering antigens following oral delivery to salmonids. A commercial immersion vaccine against furunculosis was encapsulated within PLG microparticles and delivered to Atlantic salmon by oral intubation and intra-peritoneal injection.  Following delivery, antibody responses and protection against lethal challenge with <i>Aeromona salmonicida </i>were minimal.  SEM and protein studies of particles indicated that encaps
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31

Roberts, Laura Jayne. "Improving the survival and fitness of hatchery-reared salmonids in restoration programmes." Thesis, Swansea University, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.678416.

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32

Brown, Thomas Gordon. "The role of abandoned stream channels as over-wintering habitat for juvenile salmonids." Thesis, University of British Columbia, 1985. http://hdl.handle.net/2429/24488.

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The role of ephemeral swamps and intermittent tributaries (off-stream habitat) located on the flood-plain of a west coast Vancouver Island stream (Carnation Creek), as over-wintering habitat, was examined for two winters. All trout (Salmo gairdneri and S_. clarki clarki) and juvenile coho salmon (Oncorhynchus kisutch) off-stream habitat were identified and characterized. Within this habitat: seasonal movement of salmonids was noted, coho growth rates were measured, salmonid populations were enumerated and contribution of off-stream habitat to the total coho smolt production was estimated. Coh
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33

McKeever, Thomas J. "The estimation of individual fish size using broadband acoustics with free-swimming Salmonids /." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ34206.pdf.

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34

Ang, Keng Pee. "New strategies for feeding salmonids : video monitoring and contrast enhancement of feed pellets." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp02/NQ46311.pdf.

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35

Boyd, James W. "Effects of water temperature and angling on mortality of salmonids in Montana streams." Thesis, Montana State University, 2008. http://etd.lib.montana.edu/etd/2008/boyd/BoydJ0808.pdf.

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In Montana, angling closures are used to protect salmonids from the deleterious impacts of angling at elevated water temperatures (23&Acirc;&deg;C). Catch-and-release angling (CR) studies have reported high levels (30-40%) of salmonid mortality at water temperatures >20&Acirc;&deg;C, but few studies assess CR mortality of salmonids at water temperatures observed in Montana streams during mid-summer (23&Acirc;&deg;C). The primary objective of this study was to measure CR mortality of rainbow trout, brown trout, and mountain whitefish in three water temperature treatments; when daily maximum wat
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36

Middlemas, Stuart John. "Interactions between harbour seals (Phoca vitulina) and salmonids (Salmo spp.) in estuarine environments." Thesis, University of Aberdeen, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.288379.

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There is great interest in the perceived conflict between salmon fisheries and seals, but little information to inform managers.  This study therefore explored the interactions between harbour seals and salmonids within an estuarine system, the Cromarty Firth, NE Scotland (57°37’N, 4°21’W).  The number of seals using this area in the 2000 pupping season was estimated to be 188 (138-286) using a novel Bayesian framework that corrected counts of seals on land for those remaining in the water. The presence of seals in the mouth of the River Conon, at the head of the Firth, and the occurrence of s
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37

Causey, Dwight R. "Proteomic and molecular investigations of links between growth and immune function in salmonids." Thesis, University of Aberdeen, 2018. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=240038.

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The allocation of energetic resources into competing physiological systems is crucial for the survival and fitness of an organism. Maintenance of active growth and effective immune function is energetically costly and therefore, trade-offs should have evolved to optimise the allocation of resources into these systems according to physiological status. While recent studies have begun to elucidate the mechanisms by which cross-talk exists between these two systems, more work is needed to characterise their interactions. A high-throughput proteomics approach was developed to investigate the molec
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38

Larsson, Pia L. M. "Foraging efficiencies on drifting and benthic prey in juvenile salmonids - effect of light." Thesis, Karlstads universitet, Institutionen för miljö- och livsvetenskaper, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-41939.

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Stream living salmonids are generally regarded as drift feeders that rely upon their vision when foraging. It has been shown that salmonids become nocturnal at low water temperatures, but have a low foraging efficiency as light intensity is low, due to their dependence upon vision. Shifting from drift feeding to benthic feeding, has been suggested, and analyses of gut contents during winter have shown that the diet of salmonids mainly consists of benthic invertebrates. Most experimental studies of salmonid foraging have only offered the fish drifting prey or only given the fish access to benth
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39

Robb, David Henry Francis. "Some factors affecting the flesh quality of salmonids : pigmentation, composition and eating quality." Thesis, University of Bristol, 1998. http://hdl.handle.net/1983/c474b238-aff0-4c37-96af-e223c441f6eb.

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This thesis is concerned with identifying some of the factors which affect the flesh quality of Atlantic salmon (Salmo salar) and rainbow trout (Oncorhynchus mykiss). The flesh of any food animal is of utmost importance. Much work has been carried out on the flesh of land animals, but comparatively little is known about the factors which affect the quality of fish flesh. Salmonids have been farmed for a relatively short period of time, but great advances have been made in the techniques for their rearing. Now that the fish can be grown easily, more information is required on the factors which
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40

Lowther, Alan B. "Development, expansion, and evaluation of release-recapture survival models for Snake River juvenile salmonids, with new algorithms allowing time-dependent individual covariates /." Thesis, Connect to this title online; UW restricted, 2002. http://hdl.handle.net/1773/6378.

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41

Bettge, Kathrin. "The proliferative kidney disease of salmonids : dynamics of the parasite in the fish host /." [S.l.] : [s.n.], 2008. http://opac.nebis.ch/cgi-bin/showAbstract.pl?sys=000286556.

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42

Power, Elizabeth A. "Effects of log storage on zooplankton and juvenile salmonids in Babine Lake, British Columbia." Thesis, University of British Columbia, 1987. http://hdl.handle.net/2429/26516.

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Effects of log storage on water quality, zooplankton and juvenile salmonids were investigated at Babine Lake, British Columbia in a series of enclosure, field and laboratory experiments. Enclosures were stocked with lake zooplankton and treated with lodgepole pine (Pinus Contorta) and white spruce (Picea glauca) logs for two 25 day periods. Oxygen depletion, to levels as low as 2.5 mg/l, and increased lignin and tannin (L-T) concentration (a measure of wood leachate) occurred in log treated enclosures. Zooplankton density significantly decreased with increased log number, but changes in commun
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43

Mazur, Carl François. "Growth, incidence of bacterial kidney disease and immunological function of salmonids reared in captivity." Thesis, University of British Columbia, 1991. http://hdl.handle.net/2429/30127.

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Pacific salmon reared commercially off of the Coast of British Columbia suffer great mortality losses to Bacterial Kidney Disease (BKD), caused by the diplobacillus bacterium Renibacterium salmqninarum. This thesis investigates the effects of environmental conditions on the growth performance and disease susceptibility of salmonids reared in captivity. I found that growth rate of chinook salmon was significantly higher in fish fed to 100 compared to 67 % of satiation during the first 175 days of saltwater rearing but not during the first winter. Feed coversion rate was significantly higher fo
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44

Aminirissehei, Abdolhossein. "Passive immunization of salmonids against furunculosis and vibriosis with chicken egg yolk immunoglobulins (IGY)." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/MQ61527.pdf.

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45

Murua, Jefferson. "The role of social rank in the development, physiology and reproductive strategies in salmonids." Thesis, University of Exeter, 2009. http://hdl.handle.net/10036/104585.

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Salmonids naturally organise into social hierarchies both in the wild and aquaculture. This thesis investigates how social rank influences the physiology and development of salmonids with different life strategies using Atlantic salmon (Salmo salar) as a model. In broad terms two types of studies were conducted. Firstly osmoregulatory traits of freshwater parr prior to smolting, maturing or remaining immature where investigated using Na+ gill uptake kinetics. Highly distinct patterns emerged, especially for Na+ uptake affinity, between future alternative phenotypes, which could potentially be
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46

Brockmark, Sofia. "Environmental influences on the behavioural ecology of juvenile salmonids : the importance of rearing density /." Göteborg : Department of Zoology, Animal Ecology, University of Gothenburg, 2009. http://hdl.handle.net/2077/21127.

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47

Jaramillo, Torres Hugo Alexander. "Intestinal health and microbiota in salmonids : the impact of probiotics under potentially stressful conditions." Thesis, University of Plymouth, 2017. http://hdl.handle.net/10026.1/9705.

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The intestine and associated bacterial microbiota have a central role the physiology and homoeostasis of the host. The understanding of how farming conditions affect the intestine and associated microbiota of fish is the high importance to counteract the potential threats to health and welfare. Thus, this thesis aims to understand the role of stressful husbandry conditions on the intestine and associated microbiota of rainbow trout and Atlantic salmon. Within this context, the role of Pediococcus acidilactici as health promoter was also investigated Chapter 3 investigated the replacement of fi
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48

McCarthy, Una. "Piscirickettsia salmonis : characterisation, infection and immune response in salmonid fish." Thesis, University of Stirling, 2005. http://hdl.handle.net/1893/2711.

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The pathogen Piscirickettsia salmonis, has been isolated from all species of salmonid and has been found in Chile, Canada, Ireland, Norway and Scotland. Rickettsia-like organisms from European sea bass (Dicentrarchus labrax) were found to share common antigens with the P. salmonis type-strain, LF-89 using the indirect fluorescent antibody test (IFAT) and immunohistochemistry (IHC). In addition, the DNA sequences of the 16S rDNA and 16S-23S internal transcribed spacer region (ITS) were compared with those published for P. salmonis strains and showed that the sea bass piscirickettsia-like organi
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49

Jaensson, Alia. "Pheromonal Mediated Behaviour and Endocrine Responses in Salmonids : The impact of Cypermethrin, Copper, and Glyphosate." Doctoral thesis, Uppsala universitet, Ekotoxikologi, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-121848.

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The effects of cypermethrin, copper and glyphosate on the endocrine system and subsequent response to female pheromones were investigated in mature male brown trout (Salmo trutta) parr.  Responses measured were the amount of strippable milt, blood plasma levels of both an androgen (11-ketotestosterone (11-KT)) and a progestin (17α,20β-dihydroxy-4-pregnen-3-one (17,20b-P)), and behavioural changes. This was done in a two phased investigation where parr were exposed to one of the following via ambient water: 1) 0.1 or 1.0 μg L-1 cypermethrin, 2) 10 or 100 μg L-1 copper (Cu2+), or 3) 150 μg L-1 g
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50

Salonius, Kira. "Effects of early rearing history on selected endocrine and immune functions in juvenile Pacific salmonids." Thesis, University of British Columbia, 1991. http://hdl.handle.net/2429/30297.

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The effects of different early rearing conditions on plasma Cortisol concentration, immune function, hematological profile, and disease resistance were examined in populations of hatchery-reared and wild Chinook salmon (Oncorhynchus tshawytscha) and hatchery-reared, wild, and colonized coho salmon (O. kisutch). These features were examined during smoltification and after an acute stress. The effect of initiating feeding with a wild-type diet as compared to a commercially prepared diet was also examined in chinook salmon fry as one aspect of rearing history that is different between fish reared
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