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Dissertations / Theses on the topic 'Salmones'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Campos, Torres Rodrigo Alfonso. "Estado y Proyecciones del Transporte para Exportaciones de Salmones." Tesis, Universidad de Chile, 2009. http://repositorio.uchile.cl/handle/2250/102120.

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El objetivo principal de este trabajo es investigar el estado del arte de la oferta y logística del transporte para la industria del salmón en Chile, con el propósito de contar con un diagnóstico y pronóstico preliminares de la problemática que prevé dicha industria en su crecimiento, producto de problemas de oferta y aumentos de costos del transporte aéreo y marítimo. En efecto, los positivos resultados de la industria chilena del salmón, obtenidos principalmente en mercados de Asia, EEUU, Latinoamérica y Europa, han permitido que los retornos del sector salmonicultor, para el año 2004

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2

Carja, Poggini Thiare. "Diseño de Flota de Buques para una Empresa Productora de Alimento para Salmones." Tesis, Universidad de Chile, 2011. http://www.repositorio.uchile.cl/handle/2250/102518.

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3

Montecinos, Rojas Felipe Andrés. "Identificación y expresión del gen constitutivo sdhA, de Piscirickettsia salmonis cepa LF-89 en salmones del Atlántico (Salmo salar) desafiados y en cultivo celular infectado." Tesis, Universidad de Chile, 2015. http://repositorio.uchile.cl/handle/2250/131836.

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Memoria para optar al Título Profesional de Médico Veterinario<br>P. salmonis es la bacteria responsable de la enfermedad denominada “piscirickettsiosis”, una de las principales amenazas para la industria acuícola de salmones en Chile. La gran tasa de mortalidad que produce la enfermedad en los sistemas productivos justifica la necesidad de entender cómo el agente es capaz de diseminarse y de persistir en los peces. Es así que los métodos moleculares se presentan como una vía rápida de diagnóstico mediante el uso de sus diferentes herramientas. Mediante el uso de herramientas de alineamiento d

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4

Romero, Yáñez Gonzalo Ignacio. "Sistema de apoyo a las decisiones de ruteo maritímo para un proveedor de alimentos para salmones." Tesis, Universidad de Chile, 2008. http://repositorio.uchile.cl/handle/2250/103117.

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El presente trabajo de título tuvo como objetivo diseñar y desarrollar el prototipo de un sistema de apoyo a las decisiones de ruteo marítimo para una empresa proveedora de alimento para salmones. Es posible esquematizar el trabajo enfrentado como un problema de ruteo de buques, con flota heterogénea, ventanas de tiempo suaves, restricciones de accesibilidad y precedencia, en el que además, en algunos casos, es necesario decidir la cantidad a entregar a cada cliente, sujeto a un porcentaje mínimo de su pedido original. Luego, el problema presenta características muy complejas por tratar

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5

Marín, Hevia Camila Fernanda. "Plan de Negocios de Empresa que Comercializa Sistemas de Cultivo para Salmones en Base a Aleaciones de Cobre." Tesis, Universidad de Chile, 2011. http://repositorio.uchile.cl/handle/2250/104159.

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Ingeniera Civil Industrial<br>El objetivo de este trabajo es la elaboración un Plan de Negocios de EcoSea, el cual contempla un rediseño en su modelo de negocios, una propuesta de reestructuración societaria y de los planes estratégicos, y la formulación de un plan de control de este nuevo modelo, de manera de poder cumplir con los objetivos de crecimiento establecidos por la compañía. EcoSea Farming S.A., es una empresa chilena que pone a disposición del mercado sistemas de cultivos en base a aleación de cobre, para la industria acuícola en general, con un enfoque inicial en la industria s

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6

Accini, Muñoz Gina Paola. "Estimación de heredabilidad e identificación de marcadores RAPD asociados a tasa de crecimiento en zebrafish (Danto rerio)." Tesis, Universidad de Chile, 2009. http://repositorio.uchile.cl/handle/2250/101714.

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Chile es uno de los mayores productores de salmones y truchas a nivel mundial, para aumentar la competitividad en este mercado es imprescindible generar tecnologías (biotecnologías) que permitan mantener su posicionamiento global. El desarrollo de estas tecnologías en otras especies de importancia agronómica, se sustenta en el desarrollo de marcadores moleculares y mapas genéticos, que han permitido identificar los genes, regiones genómicas o QTL (“Quantitative Trait Loci”), que afectan los caracteres de importancia económica. Para salmones la ausencia de mapas genéticos saturados con m

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7

Padilla, Trujillo Jorge. "Evaluación del número de muestras obtenidas en las plantas de proceso para el programa nacional de control de residuos de fármacos en salmones de exportación." Tesis, Universidad de Chile, 2007. http://repositorio.uchile.cl/handle/2250/132248.

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Memoria para optar al Título Profesional de Médico Veterinario<br>El comercio internacional de productos de origen acuícola, es cada vez más exigente. En la actualidad, a las restricciones de tipo sanitario, deben agregarse aquellas relacionadas con la presencia de residuos químicos en estos productos. Con el objeto de dar cumplimiento a estas exigencias de exportación, en el año 1997 en Chile se instaura el “Programa de Control de Residuos” en salmones de exportación a cargo del Servicio Nacional de Pesca (SERNAPESCA), del Ministerio de Economía. El principal objetivo de este programa de co

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8

Griffen, Angela Anne. "Molecular analysis of the salmon pathogen Piscirickettsia salmonis." Thesis, University of Glasgow, 1998. http://theses.gla.ac.uk/1323/.

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Piscirickettsia salmonis is the causative agent of Piscirickettsiosis, a disease causing significant losses in salmon aquaculture in Chile and which has also been isolated in salmonids in several other countries. This investigation was designed to prepare a recombinant library of P. salmonis DNA in a phage lambda vector. P. salmonis LF-89 was grown in CHSE-214 and RTG-2 tissue culture cells and morphological changes monitored by light microscopy and staining. Cytoplasmic vacuoles were visible in infected cells by 5 days post-infection and these expanded in size until cells burst, releasing bac

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9

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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10

Gonzalez-Alanis, Pablo. "Frontal filament morphogenesis in the salmon louse Lepeophtheirus salmonis." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape2/PQDD_0019/MQ48798.pdf.

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11

Siderakis, Villalobos Constantino Angel. "Conectividad e Infraestructura para el Transporte de Personas que Laboran en Centros de Producción de Salmones en el Mar, en Zonas Geográficas Aisladas de la XI Región de Chile." Tesis, Universidad de Chile, 2010. http://www.repositorio.uchile.cl/handle/2250/102413.

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12

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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13

Frenzl, Benedikt. "Understanding key factors associated with the infection of farmed Atlantic salmon by the salmon louse Lepeophtheirus salmonis." Thesis, University of Stirling, 2015. http://hdl.handle.net/1893/22320.

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The objective of the work described in the current thesis was to provide a better understanding of some of the key factors associated with sea louse, Lepeophtheirus salmonis, infection of farmed Atlantic salmon. In Chapter 2, initial work focused on establishing the vertical and horizontal distribution of sea lice copepodids and spatial patterns of on-farm infections. The louse distribution was investigated along the main current gradient across adjacent salmon production pens at three commercial sites. A depth profile for the distribution of larval lice was also established for the top 12 m o

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14

Freeman, Mark Andrew. "Potential biological control agents for the salmon louse Lepeophtheirus salmonis (Kroyer, 1837)." Thesis, University of Stirling, 2002. http://hdl.handle.net/1893/1685.

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The salmon louse, Lepeophtheirus salmonis (Krøyer), is an obligate ectoparasitic copepod that lives on the external surface of salmonid fish. It is the most common parasite on cage reared Atlantic salmon (Salmo salar L.), costing the aquaculture industry in Scotland millions of pounds each year to control. Traditional methods used to control sea lice have centred on the use of chemical pesticide treatments, which are expensive, hazardous to handle, potentially deleterious to the marine environment, and are sometimes ineffective. Furthermore, the misuse use of two previously efficacious chemoth

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15

Vigneau, Antoine John. "Digestive enzymes of the salmon louse (Lepeophtheirus salmonis) : implications for vaccine development." Thesis, University of Aberdeen, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.429468.

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This study identified potential salmon louse gut antigens and determines the fate of salmon antibodies in the louse gut. The characteristics and distributions of three salmon louse (<i>Lepeophtheirus salmonis</i>) gut enzymes, aminopeptidase (SLAP), alkaline phosphatase (LAlkP) and β-acetyl-hexosaminidase (LHex) are described. SLAP preferred terminal methionine residue substrates and was inhibited by leuhistin, amastatin and bestatin, identifying it as an aminopeptidase N-type enzyme. Chelators inhibited SLAP activity, and Zn<sup>2+</sup> reactivated SLAP after chelation. The enzyme was inhi

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16

Novak, Colin William. "The salmon louse Lepeophtheirus salmonis (Caligidae) as a vector of Aeromonas salmonicida." Thesis, University of British Columbia, 2013. http://hdl.handle.net/2429/44770.

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The sea louse, Lepeophtheirus salmonis, has been hypothesized to be a vector of fish pathogens and previous studies have isolated viral and bacterial pathogens from L. salmonis parasitizing farmed salmon. To examine the potential transmission of A. salmonicida by preadult and adult L. salmonis via parasitism of Atlantic salmon (Salmo salar), an in vivo bacteria-parasite challenge model was tested. Two pathogen challenge trials were performed, in which sea lice from donor (Aeromonas salmonicida-injected) fish were allocated among recipient fish for 14 days. Three hypotheses were examined: (i.)

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17

Labus, Marie B. "The production of a recombinant vaccine against the salmon louse Lepeophtheirus salmonis." Thesis, University of Aberdeen, 1994. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU539163.

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Infestation of commercially reared salmonids with the salmon louse Lepeophtheirus salmonis, is a large problem for the fish farming industries in Scotland, Ireland and Norway. Lice infestations cause high fish mortalities and losses in revenue for the fish farmer. Conventional treatment of lice infestation involves the use of organophosphate insecticides which are limited in their efficacy against lice, as well as being highly toxic to the flora and fauna which surround the sea cages. We have investigated the possibility of producing a recombinant vaccine against L. salmonis based on immunisat

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18

Kuzyk, Michael Allan. "Development of an efficacious recombinant vaccine for the obligate intracellular salmonid pathogen Piscirickettsia salmonis." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape2/PQDD_0010/NQ52764.pdf.

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19

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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20

Grant, Stephanie Mary. "Production of astaxanthin by the yeast Phaffia rhodozyma." Thesis, Queen's University Belfast, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.324833.

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21

Wadsworth, Simon Leigh. "The control of sea lice Lepeophtheirus salmonis (Kroyer, 1837) (Copepoda: Caligidae) on Atlantic salmon Salmon salar L., production sites." Thesis, University of Aberdeen, 1998. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU532684.

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Sea lice Lepeophtheirus salmonis are the major pathogen affecting the salmon farming industry. Current methods of control, especially in the UK, are largely ineffective as they do not affect the chalimus stages of L. salmonis and are toxic to fish. Greater control of L. salmonis through improved management, more effective compounds, disease control and stock selection were examined. The epidemiology of L. salmonis on Atlantic salmon Salmo salar production sites was examined at a number of farms within Loch Sunart. Intensity of infection was found to be influenced by both management practices a

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22

Butler, Ricky. "In vitro modelling of the immunological interactions between the salmon louse, Lepeophtheirus salmonis (Kroyer, 1837), and the Atlantic salmon, Salmo salar (L., 1758)." Thesis, University of Stirling, 2001. http://hdl.handle.net/1893/21841.

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Atlantic salmon, SaI1M salar. L., have been shown to be more susceptible to infections by the caligid copepod Lepeophtheirus salmonis (Kreyer, 1837) than other salmonid species. Atlantic salmon exhibit a reduced cellular immune response to the attached parasite which has led to the hypothesis of the presence of sea louse associated compounds that depressed the fish's normally efficient inflammatory mechanisms. The aim of the current study was to test this hypothesis. A biochemically defmed in vitro culture system was developed that would allow collection of the secreted/excreted products of th

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23

Fewings, Graham Adrian. "Resistive properties and detection of fish." Thesis, University of Southampton, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.340366.

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24

Trevors, Crystal Margaret. "Immune response of carp, Cyprinus carpio and Atlantic salmon, Salmo salar to Piscirickettsia salmonis." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0007/MQ30061.pdf.

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25

Roth, Myron. "Studies on aspects of the chemotherapeutic control of the salmon louse Lepeophtheirus salmonis Kroyer 1837 (Copepoda: Caligidae)." Thesis, University of Stirling, 1992. http://hdl.handle.net/1893/21837.

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The efficacy of a range of anti-parasitic chemotherapeutic agents against the salmon louse Lepeophtheirus salmonis following topical application was studied in vitro and in vivo. In general, adult and preadult lice were susceptible to a wide range of compounds with dose rates, following 1 hour exposures, ranging several orders of magnitude (10.0 - 0.001 mg/L). Overall the pyrethroid compounds which were tested were found to have the widest therapeutic ratios, indicating the potential of this group of chemotherapeutants for sea lice control. Resistance to the organophosphorus (OP) compounds dic

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26

Lewis, Danielle Lee. "Interactions between salmon macrophages and pathogenic bacteria in the presence of secretions isolated from Lepeophtheirus salmonis." Thesis, University of British Columbia, 2013. http://hdl.handle.net/2429/44308.

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In response to stimuli (i.e., salmon mucus) the sea louse, Lepeophtheirus salmonis, produces pharmacologically active substances (prostaglandin E₂, trypsin-like proteases and cathepsin). Lice-derived secretions impair the genetic expression of pro-inflammatory mediators in the commercial salmon-head kidney (SHK-1) cell line and head kidney macrophages isolated from Atlantic salmon (Salmo salar); however, effects on the functionality of these cells has not been explored. Related to the development of an inflammatory response, salmon species (Oncorhynchus spp. and Salmo spp.) exhibit differences

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27

Ritchie, Gordon. "Studies on the reproductive biology of Lepeophtheirus salmonis (Kroyer, 1838) on Atlantic salmon (Salmo salar, L.)." Thesis, University of Aberdeen, 1993. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU603172.

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The salmon louse (Lepeophtheirus salmonis) is recognised as a major pathogen of farmed Atlantic salmon (Salmo salar). With the growth in salmon farming in Scotland and Norway the problem of lice and the need to understand more about their biology and population dynamics has grown. The aims of this study were to examine various aspects of the reproductive biology of L. salmonis and increase fundamental knowledge of this area. It was discovered that the male reproductive system consisted of a pair of testes, vasa deferentia, spermatophore sacs and cement glands and the female reproductive system

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28

Herath, Tharangani K. "Cellular and molecular pathogenesis of Salmonid alphavirus 1 in Atlantic salmon Salmo salar L." Thesis, University of Stirling, 2010. http://hdl.handle.net/1893/2325.

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Salmonid alphaviruses (SAV) are a group of viruses that have recently emerged as a serious threat to the salmonid aquaculture industry in Europe. Over recent years, diseases caused by SAV have severely hampered the Scottish, Irish and Norwegian Atlantic salmon industry, and are considered to be among the major economically important viral diseases affecting the industry at present. Amongst the six subtypes characterised so far, Salmonid alphavirus 1 (SAV1) causes severe pathology in the heart, pancreas and the skeletal muscle of Atlantic salmon leading to death and growth retardation in the af

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29

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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30

Pietrak, Micheal. "Evaluation of Three Potential Methods for Preventing the Spread of the Salmon Louse, Lepeophtheirus salmonis (Kreyer, 1837)." Fogler Library, University of Maine, 2002. http://www.library.umaine.edu/theses/pdf/PietrakM2002.pdf.

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31

O'Shea, Bridget A. "Host identification and settlement of the infective copepodid stage of the salmon louse, Lepeophtheirus salmonis (Kroyer, 1837)." Thesis, University of Aberdeen, 2005. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU200650.

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Settlement of Lepeophtheirus salmonis copepodids on salmonid and non-salmonid fish hosts was investigated at a variety of time points post-infection. Infection was also evaluated following previous exposure to L. salmonis to determine if cues of attached lice stimulated further settlement. A new method for estimating the surface area of a fish was devised. Consequently, surface area was examined for effect on louse burden in all fish species. The external surface of the copepodid was surveyed for potential receptors that may be used in host location and recognition. The behaviour of L. salmoni

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32

Tsai, Hsin Yuan. "Genomic basis of growth traits and host resistance against sea lice (L. Salmonis) in Atlantic salmon (S. Salar)." Thesis, University of Edinburgh, 2017. http://hdl.handle.net/1842/28918.

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Background Atlantic salmon (Salmo Salar) is a key aquaculture species in several countries. Since its critical role in economic sector and scientific research, this species has been relatively extensively investigated, in comparison with other farmed and wild aquatic species. However, the genetic components associated with growth and fillet-related traits are lack consistency, and the issue of sea louse disease in both wild and famed salmon is still unsolved. Objectives Overall aim of this project was to understand the genetic basis of growth-related traits and host resistance to sea lice usin

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Heumann, Jan H. "The potential role of ABC transporters as factors influencing drug susceptibility in the salmon louse, Lepeophtheirus salmonis (Kroyer, 1837)." Thesis, University of Stirling, 2014. http://hdl.handle.net/1893/21812.

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Efficient control of sea lice is a major challenge for the sustainable production of farmed Atlantic salmon (Salmo salar (Linnaeus, 1758)). These marine ectoparasites feed on mucus, skin and blood of their hosts, thereby reducing the salmon’s growth rate and overall health. In the northern hemisphere, the most prevalent species is Lepeophtheirus salmonis (Krøyer, 1837). In 2006, global costs of sea lice infections are estimated to have exceeded €300 million, with the majority spent on a limited number of chemical delousing agents. Emamectin benzoate (EMB; SLICE®), an avermectin, has been widel

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Heavyside, Rebecca. "Dietary modulation of the interaction between Salmonid fish and sea lice (Lepeophtheirus salmonis) : effects on host attractiveness, skin mucus and immune response." Thesis, University of Aberdeen, 2017. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=235985.

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35

Carmichael, Stephen N. "An investigation into the molecular determinants of salmon louse (Lepeophtheirus salmonis (Krøyer, 1837)) susceptibility to the antiparasitic drug emamectin benzoate." Thesis, University of Stirling, 2013. http://hdl.handle.net/1893/19526.

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Caligid copepods, also called sea lice, are ectoparasites of marine fish, with Lepeophtheirus salmonis (Krøyer, 1837) emerging as a problem for mariculture of Atlantic salmon (Salmo salar Linnaeus, 1758) in the northern hemisphere. Annual costs of sea lice to global salmon farming was estimated to be in excess of €300 million in 2006, with the majority of this accounted for through expenses accrued from chemical treatments. Only a limited range of anti-sea louse drugs are available and licensed for the treatment of fish, and the continued use of only a few compounds creates a situation potenti

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Rodríguez, Silva Tomás. "Comunas salmoneras post crisis del Virus ISA: hegemonía salmonera y construcción de lugar en la región de Los Lagos." Tesis, Universidad de Chile, 2016. http://repositorio.uchile.cl/handle/2250/143693.

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37

Bron, James Emmanuel. "A study of the biology and behaviour of the copepodid larva of the salmon louse Lepeophtheirus salmonis (Kroyer, 1837) (Copepoda: Caligidae)." Thesis, University of Stirling, 1993. http://hdl.handle.net/1893/625.

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The salmon louse Lepeophtheirus salmonis (Krøyer, 1837) (Copepoda; Caligidae) is a serious pathogen of wild and farmed salmonids in the marine environment. A study has been carried out to investigate the biology and behaviour of the infective copepodid stage of this parasite. Copepodids showed a positive phototactic response to a wide spectrum of light wavelengths (300 - 700 nm) with a peak response at 550 nm. Light response was positively correlated to light intensity between 2.4 - 240 lux with immobilsation occurring at 20,000 lux. Copepodids demonstrated a negative geotactic response to inc

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38

Warren, Andrew Mark. "The impact of river flow on the distribution and abundance of salmonid fishes." Thesis, University of St Andrews, 2017. http://hdl.handle.net/10023/11569.

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River flow regime is fundamental in determining lotic fish communities and populations, and especially of salmonid fishes. Quantifying the effects of human induced flow alteration on salmonids is a key question for conservation and water resources management. While qualitative responses to flow alteration are well characterised, a more intractable problem is quantifying responses in a way that is practical for environmental management. Using data drawn from the Environment Agency national database, I fitted generalised linear mixed models (GLMMs) using Bayesian inference to quantify the respon

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Ikediashi, Charles Isioma. "Population level variation of Atlantic salmon in the chalk streams of southern England and neighbouring regions." Thesis, University of Exeter, 2015. http://hdl.handle.net/10871/22074.

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In this thesis, population level variation is elucidated for Atlantic salmon living in the chalk streams of southern England – a unique and unusual habitat – as well as in immediately surrounding regions. Salmon in these chalk streams have yet to be robustly investigated, despite individual populations standing out from neighbouring populations in several previous studies. This thesis attempts to identify how different they are and the reasons for it. Then, this thesis also investigates the effect of this distinction on their internal population structure, as well as the current and future tra

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40

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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Vernerback, Claes. "Effect of incubation temperature on Atlantic salmon metabolism as indicated by ventilation rate." Thesis, Karlstads universitet, Institutionen för miljö- och livsvetenskaper, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-44497.

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The global mean temperature is predicted to increase by up to 5 °C during this century. For fish, being ectotherms, temperature is one of the most important environmental factors, influencing them in a number of different ways, including effects on physiological traits, timing of life history events and behavior. Atlantic salmon has been shown to grow faster after being incubated at warmer temperatures. One possible explanation for this could be that the increased incubation temperature causes decreased metabolic rates. The aim of this project was to examine whether this is true. Atlantic salm

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Ramsay, Jennifer Mara. "The effects of exposure method, host species and salinity on the development of microsporidial gill disease of salmonids caused by Loma salmonae (Microspora)." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/MQ63262.pdf.

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Rubio, Mejia Olga Liliana. "The CHSE-214 salmon cell line as a model to study molecular regulation of long-chain polyunsaturated fatty acid biosynthesis in salmonids." Thesis, University of Stirling, 2015. http://hdl.handle.net/1893/21807.

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The main source of omega-3 (n-3) long-chain polyunsaturated fatty acids (LC-PUFA) in our diet is supplied by fish, and an ever-increasing proportion of these are being produced by aquaculture. The drive for the growing market demand and production from sustainable sources has led to the use of high-energy (fat) diets and, recently, to the replacement of fishmeal and fish oil with non-marine components, such as plant meals and vegetable oils that are devoid of n-3 LC-PUFA. Both changes impact greatly on lipid and fatty acid metabolism in fish, with health implications for the fish and the human

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Bull, Peter. "Expectancy-value theory as a tool in resource analysis and management, a study of the motivations of salmon anglers on the salmonier river." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ34168.pdf.

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Footen, Brian. "Impacts of piscivorous predation on juvenile chinook (Oncorhynchus tshawytscha) and other salmonids in Salmon and Shilshole Bays of Puget Sound, King CO. WA." Online pdf file accessible through the World Wide Web, 2001. http://archives.evergreen.edu/masterstheses/Accession86-10MES/Footen_B2001.pdf.

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Gravil, Helen Ruth. "Studies on the biology and ecology of the free swimming larval stages of Lepeophtheirus Salmonis (Kroyer, 1838) and Caligus Elongatus Nordmann, 1832 (Copepoda: Caligidae)." Thesis, University of Stirling, 1996. http://hdl.handle.net/1893/2380.

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The study investigated biological and ecological parameters controlling and influencing the production and distribution of the free-swimming larval stages of Lepeophtheirus salmonis (Kroyer, 1838), and to a lesser extent Caligus elongatus Nordmann 1832, in the natural environment The reproductive output of L. salmonis was influenced by seasonal effects. The number of eggs produced per brood showed an inverse relationship with increasing temperature. The number of eggs per brood was also influenced by adult female body size (cephalothorax length), which in itself exhibited an inverse relationsh

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Smedley, Marie A. "Nutritional and environmental effects on triploid Atlantic salmon skeletal deformity, growth and smoltification." Thesis, University of Stirling, 2016. http://hdl.handle.net/1893/23342.

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The Atlantic salmon (Salmo salar) is an iconic species that dominates the global finfish production sector with increasing market demand. The Scottish industry and government alone aspires for expansion of the sector to 210,000 t by 2020 with 154, 000 t produced in 2013. As such, there are pressures to improve sustainable development in particular to minimise the genetic impact of escapees on wild populations and reduce sea lice infection which are required for the granting of “green licenses” in Norway. The use of triploidy has been tested in the 1980’s with little success owing to suboptimal

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Leksell, Lina. "Early environmental effects on dominance in juvenile Atlantic salmon (Salmo salar L.)." Thesis, Karlstads universitet, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-55304.

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The earth’s climate is rapidly changing. With climate change currently altering the environment, water temperature is an important environmental factor that will have various effects on fishes since they are ectotherms. As the changes are expected to be greatest during winter, when salmonid fishes incubate their eggs, one might expect substantial effects on egg development. In this experiment pairs of fish, matched by length, were compared. For each pair, one fish had experienced ambient cold temperatures (cold treatment) during embryogenesis and the other elevated temperatures (warm treatment

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Gendron, Jean-François. "Physical controls on summer thermal refuges for salmonids in two gravel-cobble salmon rivers with contrasting thermal regimes: the Ouelle and Ste. Marguerite rivers." Thesis, McGill University, 2013. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=119636.

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Salmon and trout respond to river temperature fluctuations by moving into cooler areas when main-stem temperatures exceed their upper tolerance limits. In a climate warming context, these areas are increasingly recognized as an important aspect of stream habitat especially for cold water fish such as salmonids, because they can act as thermal refuges during summer months. This thesis aims firstly to examine the physical processes that underlie the formation of various types of cold water anomalies in a river setting, and secondly, to determine which anomaly types are being used as refuges by s

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Tyedmers, Peter. "Salmon and sustainability, the biophysical cost of producing salmon through the commercial salmon fishery and the intensive salmon culture industry." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/NQ61187.pdf.

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