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Dissertations / Theses on the topic 'Freshwater fish'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Henriksson, Anna. "Biotic resistance in freshwater fish communities." Doctoral thesis, Umeå universitet, Institutionen för ekologi, miljö och geovetenskap, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-110251.

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Invasions of non-native species cause problems in ecosystems worldwide, and despite the extensive effort that has been put into research about invasions, we still lack a good understanding for why some, but not other, communities resist these invasions. In this doctoral thesis I test hypotheses on biotic resistance using a large dataset of more than 1000 both failed and successful introductions of freshwater fish into Swedish lakes. We have found that the classic species richness hypothesis is a poor descriptor of introduction success because it fails to acknowledge that resident species contr

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2

Carden, Kerilynn M. "Macrophytes as fish habitat : the role of macrophyte morphology and bed complexity in fish species distributions /." Link to abstract, 2002. http://epapers.uwsp.edu/abstracts/2002/Carden.pdf.

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3

Lee, Ching-man. "Epidemiology of laribacter hongkongensis in freshwater fish /." View the Table of Contents & Abstract, 2005. http://sunzi.lib.hku.hk/hkuto/record/B3149447X.

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4

Olden, Julian David. "Predictive models for freshwater fish community composition." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape2/PQDD_0021/MQ54206.pdf.

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5

Lee, Ching-man, and 李靜敏. "Epidemiology of laribacter hongkongensis in freshwater fish." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2005. http://hub.hku.hk/bib/B45010213.

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6

Benejam, Vidal Lluís. "Fish as ecological indicators in Mediterranean freshwater ecosystems." Doctoral thesis, Universitat de Girona, 2008. http://hdl.handle.net/10803/7873.

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Podeu escriure el text directament o arrossegar-lo des d'un altre document<br/>L'objectiu d'aquesta tesi és contribuir a l'ús dels peixos continentals com a indicadors de l'estat ecològic a la conca Mediterrània. En el primer treball es va detectar que encara que tots els índex biològics estaven correlacionats significativament, els peixos integren i expressen els estressos de manera i a una escala diferents, aportant una informació complementària als altres índexs. Al segon article es van estudiar els cabals de sis conques catalanes. S'ha mostrat que els règims hídrics estan alterats amb una

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7

Shaw, Benjamin John. "The ecotoxicology of engineered nanoparticles to freshwater fish." Thesis, University of Plymouth, 2011. http://hdl.handle.net/10026.1/565.

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The use of nanoscale materials is growing exponentially, but there are also concerns about the environmental hazard to aquatic biota. Metal-containing engineered nanoparticles (NPs) are an important group of these new materials, and whilst there are undoubtedly a plethora of beneficial uses for these NPs, it is essential that an appropriate risk assessment is carried out in order to protect the environment and human health, with the consumption of contaminated fish a distinct possibility. The current study aimed to assess the bioavailability, uptake and toxicological effects of two metal-NPs (

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8

Brydges, Nichola M. "Cognition in freshwater fish : effects of the environment." Thesis, University of Edinburgh, 2008. http://hdl.handle.net/1842/2388.

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For animals that live in a reasonably variable environment the capacity for learning and memory allow them to adapt to the changes they experience. Ecological factors that vary between habitats can affect a range of learning behaviours. Less attention has been directed at how this variation may affect memory processes, or how different ecological variables might interact when shaping cognition and behaviour. Therefore one aim of this thesis was to investigate how different ecological variables shape memory abilities and to test whether those same variables affect other related behaviours such

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9

Hartikainen, Hanna-Leena. "Freshwater bryozoan abundence, eutrophication and salmonid fish disease." Thesis, University of Reading, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.493801.

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This research investigates the links between nutrient enrichment, bryozoan abundance and the development of myxozoan parasites in bryozoans. It was found that bryozoan abundances are elevated in nutrient-rich rivers, demonstrating the potential bio-indicator value of bryozoans and predicting increased bryozoan abundances with increased planktonic productivity when space is not limiting. A comprehensive set of laboratory microcosm studies showed also that experimental nutrient enrichment increased growth rates and statoblast production in Fredericella sultana, corroborating the results from fie

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10

Calta, M. "Early development and gill function in freshwater fish." Thesis, University of Nottingham, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.307766.

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11

Liang, Yan. "Reclamation of wastewater for polyculture of freshwater fish." HKBU Institutional Repository, 1997. http://repository.hkbu.edu.hk/etd_ra/137.

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12

Sternberg, David. "Life-History Traits and the Functional Diversity of Australian Freshwater Fish." Thesis, Griffith University, 2014. http://hdl.handle.net/10072/367236.

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Australian freshwaters are home to approximately 256 fish species from 36 families, many of which are endemic to the country and considered threatened, vulnerable or rare in the wild. In part this is due to a long history of continental isolation where increasing aridity and flow unpredictability have given rise to a fish fauna characterised by a unique association of life-history traits (i.e. characteristics of an organism that contribute to its fitness or performance, and which allow it to function in the environment) in order to cope with natural variation in environmental seasonality, stab

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13

Wang, Xi-chang. "Comparisons of Quality of Kamaboko Gels Derived from Freshwater Fish and Marine Fish." Kyoto University, 2001. http://hdl.handle.net/2433/150361.

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14

Zha, Yinghua. "Assembly of Gut Microbial Communities in Freshwater Fish and Their Roles in Fish Condition." Doctoral thesis, Uppsala universitet, Limnologi, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-314235.

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Animal hosts provide associated microorganisms with suitable ecological niches in their intestines. Microbes help their hosts to digest food, protect against pathogens, and influence the host’s metabolisms. Compositional variation of gut microbial communities is common among hosts, and may affect the health status of hosts. Diet and genetic factors are well known to influence the assembly of gut microbial communities. This thesis focuses on disentangling the contributions of factors including host genetics (sex), diet, environment, and other ecological processes to the assembly of gut microbia

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15

Taylor, Lisa N. McDonald D. G. "Physiological indicators of waterborne copper toxicity in freshwater fish /." *McMaster only, 2002.

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16

Kirkwood, Richard Christopher. "Interactions between fish, Mysis, and zooplankton in Lough Neagh." Thesis, University of Ulster, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.268119.

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17

Khan, Tariq. "Exotic fish impacts on lake community structure and function in Western Victoria, Australia." Thesis, Federation University Australia, 2002. http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/164899.

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The researcher investigated a number of closed catchment lakes in western Victoria that have been stocked with exotic fish. Exotic-native fish interactions were studied and the potential of the exotic species to affect the lake ecosystem structure was explored.<br>Doctor of Philosophy

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18

Knight, Amelia Cassidy Terhune Jeffery S. "General fish health assessment and age evaluation of impinged fish at steam generating power plants." Auburn, Ala, 2008. http://repo.lib.auburn.edu/EtdRoot/2008/FALL/Fisheries_and_Allied_Aquacultures/Thesis/Knight_Amelia_50.pdf.

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19

Feist, Stephen Wolfgang. "Inter-relationships of myxosporeans, including PKX with certain freshwater fish." Thesis, University of Plymouth, 1993. http://hdl.handle.net/10026.1/2755.

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The prevalence and impact of proliferative kidney disease (PKD) and myxosporidiosis has been investigated in wild fish stocks in the UK, over 1,500 fish representing 17 species being examined. PKD was recorded in brown trout, grayling and pike, the causative agent, the PKX cell, being identified with the aid of light and electron microscopy. A further 27 myxosporean species were also noted, with Myxobolus cotti (syn. M. jiroveci), in the brain of bullheads Cottus gobio being recorded for the first time. Studies on the structure and development of Myxidium lieberkuehni in pike revealed several

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20

Langford, Briana. "Analysis of the Fish Community on Tidal-Freshwater Constructed Reefs." VCU Scholars Compass, 2012. http://scholarscompass.vcu.edu/etd/2852.

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Constructed reefs are used successfully in marine systems to enhance spawning habitat; this study examines the effectiveness of constructed reefs in a tidal-freshwater river. Fish abundance, species diversity and richness, residency, water column position, reproductive guilds, and feeding guilds were analyzed on two constructed reefs in the tidal-freshwater James River and compared to silted regions representing the primary substrate in the river. Reefs were sampled using hydroacoustics, electroshocking, gillnetting, trawling, and egg mats. The constructed reefs had a greater proportion of

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21

Sheath, Danny. "Ecological consequences of indigenous and non-indigenous freshwater fish parasites." Thesis, Bournemouth University, 2016. http://eprints.bournemouth.ac.uk/25014/.

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Parasites can have considerable consequences for their freshwater fish hosts, irrespective of whether they are intermediate or final hosts. The ecological consequences of infection arise from processes including parasite manipulation, where the parasite manipulates the host to increase their chance of transmission to the next host in the lifecycle, and parasite-mediated competition, where a consequence of infection is an alteration in the symmetry of competition between hosts and their uninfected conspecifics, or with other species. Whilst there is a great deal of existing knowledge on some of

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22

French, Kenneth J. "Mercury evolution in freshwater fish from reservoirs in Newfoundland, Canada." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp04/mq25841.pdf.

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23

Heath, Daniel D. "An experimental and theoretical investigation of stunting in freshwater fish /." Thesis, McGill University, 1985. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=65985.

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24

Monopoli, Matthew Stephen. "Acid water tolerance in a New Zealand native freshwater fish." Thesis, University of Canterbury. Zoology, 1996. http://hdl.handle.net/10092/6974.

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Physiological experiments were conducted to measure the effects of low pH water upon Na⁺ fluxes and swimming performance in east coast neutral water banded kokopu, and west coast banded kokopu living in naturally acid water. This allowed comparisons to be made regarding the relative acid tolerance between the two population stocks. A morphological study of the gills using scanning electron microscopy and transmission electron microscopy was carried out on a limited number of fish to compare gill structures of east coast acid and non acid exposed fish with west coast fish. East coast kokopu fro

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25

Longshaw, Matthew. "Studies on myxozoan parasites of freshwater fish and invertebrate hosts." Thesis, University of Plymouth, 2004. http://hdl.handle.net/10026.1/2566.

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A study of myxozoan parasites has been investigated in hosts from freshwater environments in the UK. Over 17,000 oligochaetes, almost 5,000 juvenile cyprinids representing 7 species and over 60 invertebrate species have been examined for the presence of myxozoan parasites. In addition, studies on the lifecycle of Tetracapsuloides bryosalmonae (the causative agent of salmonid proliferative kidney disease, PKD) and of selected cyprinid myxozoans were conducted. A total of 21 actinospore types in seven collective groups were isolated and described from oligochaetes collected from seven different

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26

Harrison, A. J. "Ecology and control of the freshwater fish louse (Argulus foliaceus)." Thesis, Queen's University Belfast, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.431598.

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27

Carrier, Roxie. "Temperature Tolerance of Freshwater Fish Exposed to Water-Borne Cadmium." Thesis, North Texas State University, 1987. https://digital.library.unt.edu/ark:/67531/metadc504077/.

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Lethal toxicity values (96 h LC50; mg Cd/L) for the test species were similar: Lepomis cyanellus, 11.52; Notropis lutrensis, 6.62; Pimephales promelus, 3.58. However the effects of cadmium concentration and exposure time on temperature tolerance varied between species. Neither cadmium concentration nor exposure time had a significant effect on the CTM of green sunfish. Both cadmium concentration and exposure time had a significant effect on the CTMs of red shiners and fathead minnows. By day 10 mean CTMs were 2.3 t- 4.5 C (red shiners) and 4.2 to 5.7 C (fathead minnows) lower than control CTM.

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28

Abban, Edward Kofi. "Taxonomy and biochemical genetics of some African freshwater fish species." Thesis, Swansea University, 1988. https://cronfa.swan.ac.uk/Record/cronfa43062.

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29

CIUFFA, DANIELE. "Nutrients and fish effects on plankton community in freshwater mesocosms." Doctoral thesis, Università degli Studi di Roma "Tor Vergata", 2009. http://hdl.handle.net/2108/962.

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Eutrophication affects many lakes in the world. Two important mechanisms to solve this problem are nutrient and fish control. The main aim of the present work was to study nutrient and fish effects on plankton community in freshwater shallow lakes. Two mesocosm experiments were performed, one in spring and the other in winter to test differences in response of planktonic organisms to nutrient and fish addition in different seasons. The results would be of extremely importance for the management of these ecosystems. Mesocosms were polyethylene bags filled with lake water and placed into the l

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30

McGlashan, Dugald James, and piscador@hotmail com. "Consequences of Dispersal, Stream Structure and Earth History on Patterns of Allozyme and Mitochondrial DNA Variation of Three Species of Australian Freshwater Fish." Griffith University. Australian School of Environmental Studies, 2000. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20030226.152217.

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Freshwater systems offer important opportunities to investigate the consequences of intrinsic biological and extrinsic environmental factors on the distribution of genetic variation, and hence population genetic structure. Drainages serve to isolate populations and so preserve historical imprints of population processes. Nevertheless, dispersal between and within drainages is important if the biology of the species confers a good dispersal capability. Knowledge of the population genetic structure or phylogeographic patterns of Australia's freshwater fish fauna is generally depauperate, and the

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31

Duarte, Gonçalo Filipe Fernandes. "Ghost of diadromous fish past: streamlining research on diadromous fish species using historical data at european scale." Doctoral thesis, ISA/UL, 2019. http://hdl.handle.net/10400.5/18329.

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Doutoramento em Restauro e Gestão Fluviais - Instituto Superior de Agronomia / Faculdade de Arquitetura / Instituto Superior Técnico<br>The decline of diadromous fish species has been occurring at least since the beginning of the 20th century. In this thesis, multiple European databases on the historical distribution of diadromous fish were consulted and, acknowledging the lack of data for Portugal, the first database of Portuguese historical data for freshwater fish was created. The existence of multiple databases with distinct geographical coverage and data at different spatial scales lead t

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32

Branco, Paulo José de Lemos. "Improving connectivity for river fish." Doctoral thesis, ISA, 2013. http://hdl.handle.net/10400.5/6447.

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33

Shohet, Adam Joseph. "Mate choice and sexual selection in the guppy, Poecilia reticulata." Thesis, University of Sheffield, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.269307.

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34

Gardner, Christopher John. "The behaviour and ecology of adult common bream Abramis brama (L.) in a heavily modified lowland river." Thesis, University of Lincoln, 2013. http://eprints.lincoln.ac.uk/14683/.

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Anthropogenic influences on riverine ecosystems have led to numerous impacts that have compromised fish communities. Large European lowland rivers have been amongst the most impacted aquatic environments globally. However, paradoxically, these environments have also been amongst the least studied, due the inherent difficulties of studying fish in large, turbid, dynamic environments. Common bream Abramis brama (L.) populations are amongst those impacted by reduced lateral and longitudinal connectivity that are a consequence of modifications to large lowland rivers in Europe. Thus common bream i

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35

Goss, Gregory Gerard. "Interrelationships between gill morphology and acid-base regulation in freshwater fish." Thesis, University of Ottawa (Canada), 1993. http://hdl.handle.net/10393/6794.

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This thesis examines the branchial mechanisms utilized by freshwater fish to regulate internal acid-base status and presents a model to explain the underlying basis of the compensatory processes. Rainbow trout, Oncorhynchus mykiss, brown bullhead, Ictalurus nebulosus, and American eels, Anguilla rostrata, were examined under a variety of experimental treatments which induced both respiratory (hyperoxia, hypercapnia) and metabolic (post-hyperoxia, post-hypercapnia, HCl infusion, NaHCO$\sb3$ infusion) acid-base disturbances. Acid-base-regulation was achieved by appropriate adjustments of Na$\sp+

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36

Doehring, Anna Katharina. "Urbanisation influences on freshwater fish distribution and remediation of migratory barriers." Thesis, University of Canterbury. Biological Sciences, 2009. http://hdl.handle.net/10092/2896.

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Ongoing urbanisation in lower stream reaches can adversely affect the ecology of river ecosystems by altering freshwater fish distributions. Diadromous fish species (those that migrate between the sea and freshwater) are particularly affected as unimpeded access to and from the sea is necessary for their life-cycle completion. To investigate the extent of the effects that urbanisation have on migratory freshwater fish species, I compared fish community composition between urbanimpacted and un-impacted waterways in the upper South Island, New Zealand. I also investigated whether culverts were b

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37

Perez-Camargo, Gerardo. "Effects of sublethal concentrations of pesticides on tropical freshwater fish quality." Thesis, University of Nottingham, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.294727.

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38

Bracewell, Philip John. "The effects of electric fishing on some freshwater cyprinid fish species." Thesis, University of Hull, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.327287.

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39

Warnick, William A. "Sport fish consumption advisory for West Virginia." Morgantown, W. Va. : [West Virginia University Libraries], 2002. http://etd.wvu.edu/templates/showETD.cfm?recnum=2681.

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40

Ozburn, Nicholas R. "Influence of dams on stream fish biodiversity across a diverse Georgia landscape." Auburn, Ala., 2007. http://repo.lib.auburn.edu/07M%20Theses/OZBURN_NICHOLAS_54.pdf.

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41

Go, Jeffrey. "Megalocytiviruses of freshwater ornamental fish and pathogenicity in marine and euryhaline species." Thesis, The University of Sydney, 2015. http://hdl.handle.net/2123/14118.

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Megalocytiviruses affect a broad range of fish species and have caused widespread mortality in aquaculture throughout Asia. The first confirmed report involved mass mortality in red sea bream cultured off Shikoku Island, Japan in 1990. Ornamental fish exhibiting pathology consistent with Megalocytivirus infection have been reported from a range of countries, frequently in association with fish recently imported from south east Asia. Although the relationship between megalocytiviruses in ornamental fish and food fish remains unclear, a potential linkage between a Megalocytivirus from a disease

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42

Currie, Rebecca J. (Rebecca Jean). "Upper and Lower Temperature Tolerances of Three Freshwater Game-Fish Species Exposed to Cycling Temperatures." Thesis, University of North Texas, 1995. https://digital.library.unt.edu/ark:/67531/metadc279105/.

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A total of 670 critical thermal maxima (CTMax) and minima (CTMin) were determined for three freshwater fishes acclimated to three constant temperatures and a diel regimen cycling between the lowest and highest acclimation temperatures. In all species temperature tolerance was directly related to acclimation temperature and slopes relating these variables indicate that acclimation temperature has a greater influence on tolerance of low rather than high temperatures. CTMax and CTMin values generated following exposure to 32 days of oscillating temperatures indicate that in general, fishes had te

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43

Kneeland, Stephen C. "Identification of Fish Hosts for Wild Populations of Rare Freshwater Mussels (Lampsilis cariosa and Leptodea Ochracea) Using a Molecular DNA Key." Fogler Library, University of Maine, 2006. http://www.library.umaine.edu/theses/pdf/KneelandSC2006.pdf.

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44

Anandan, Chantelle. "Morphological and genetic differentiation of the fish eye fluke Diplostomum spp. (Digenea, Diplostomatidae)." Thesis, University of Aberdeen, 2004. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=186183.

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Digenean eye-flukes of the genus <i>Diplostomum </i>(Family: Diplostomatidae) are common in the eyes of freshwater fishes. <i>Diplostomum </i>spp. infections can lead to severe detrimental deformities and even death to both farmed and wild fish species. Identification of <i>Diplostomum</i> spp. in the fish host (metacercaria) is challenging because species are morphologically indistinguishable. Since <i>Diplostomum</i> spp. are difficult to identify the literature is confounded by synonymy and as a result, the taxonomic status of the genus remains unclear. Thus, it is difficult to ascerta

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45

Ozaktas, Tugba. "Multiple Antibiotic Resistance Of Surface Mucus Dwelling Bacterial Populations In Freshwater Fish." Master's thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/12609113/index.pdf.

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Surface mucus of a freshwater fish, Alburnus alburnus (bleak), caught from Lake Mogan, situated in south of Ankara, was collected in different seasons. The total cultivable bacteria were enumerated by spread plate method on nine different media. Bacteria were isolated based on colony morphologies and pigmentation. A total of sixty bacterial isolates obtained. The mucus-dwelling bacteria were first tested for resistance against ampicillin and kanamycin<br>then streptomycin and chloramphenicol were added to the experimental set up. The resistance levels of isolates were determined in terms of fo

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46

Hamidan, Nashat A. "Ecology and conservation of Garra ghorensis, an endangered freshwater fish in Jordan." Thesis, Bournemouth University, 2016. http://eprints.bournemouth.ac.uk/25214/.

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The focal species of the research was the freshwater cyprinid fish Garra ghorensis. Endemic to the southern Dead Sea basin of the Middle East, it is ‘Red listed’ by the IUCN as ‘endangered’. It inhabits the small rivers of the basin (‘wadis’), existing within fish communities of very low species diversity. The aim of the research was to inform conservation strategies for the species through investigations into their phylogeny, current distribution, life history traits and feeding relationships. Analysis of the mitochondrial DNA of G. ghorensis with other fishes of the Garra genus tested two co

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47

Moran, Rebecca Jayne. "The impacts of climate change on freshwater fish, macroinvertebrates, and their interactions." Thesis, University of Liverpool, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.533960.

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48

Gaze, William Hugo. "Studies on the biosystematics of Trichodinid ciliates parasitic on British freshwater fish." Thesis, University of Stirling, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.296749.

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49

Godfrey, Paul C. "Recruitment Ecology of Freshwater Fish in Rivers of Australia's Wet Tropics Region." Thesis, Griffith University, 2012. http://hdl.handle.net/10072/367117.

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Hydrologic variation has a profound influence on the life cycles of fishes in tropical rivers. Several studies highlighting the critical links between fish recruitment, river hydrology and other environmental factors exist globally. However, understanding of the influence of abiotic drivers on fish recruitment in Australia’s Wet Tropics rivers is limited. There is potential for humans to further alter the hydrologic regimes and the landscapes of these rivers and therefore, gathering knowledge about fish recruitment dynamics is needed to support the implementation of appropriate management stra

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50

Elberizon, E. "Empirical and theoretical modelling of waste output and distribution from freshwater aquaculture cages." Thesis, Heriot-Watt University, 2000. http://hdl.handle.net/10399/554.

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